Proceeds from Divestiture of Businesses Proceeds from Divestiture of Businesses Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Restatement [Axis] Revision of Prior Period [Axis] Unobservable input - revenue retention volatility - maximum Unobservable input - revenue retention volatility - maximum Unobservable input - revenue retention volatility - maximum Investments Investment, Policy [Policy Text Block] business combinations, recognized intangible business combinations, recognized intangible business combinations, recognized intangible Realized Investment Gains (Losses) Realized Investment Gains (Losses) Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase for Purchase Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase for Purchase Employee Employee [Member] Employee [Member] Indefinite-lived Intangible Assets [Axis] Indefinite-Lived Intangible Assets [Axis] Entity File Number Entity File Number Additional Paid-In Capital Additional Paid-in Capital [Member] Effective Income Tax Rate Reconciliation, Tax Credit, Amount Effective Income Tax Rate Reconciliation, Tax Credit, Amount Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Carrying value - private investment Carrying value - private investment Carrying value - private investment Foreign Earnings Repatriated Undistributed Earnings of Foreign Subsidiaries RELATED PARTY TRANSACTIONS Related Party Transactions Disclosure [Text Block] Revenue from Contract with Customer [Text Block] Revenue from Contract with Customer [Text Block] Stock-based compensation expense Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-Based Compensation Cost Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Period Increase (Decrease) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Period Increase (Decrease) Business Combination, Consideration Transferred [Abstract] Business Combination, Consideration Transferred [Abstract] Fair Value, Option, Changes in Fair Value, Gain (Loss) Fair Value, Option, Changes in Fair Value, Gain (Loss) Issuance of restricted stock, net of forfeitures, shares Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Current Income Tax Expense (Benefit), Total Current Income Tax Expense (Benefit) Revenue accounted by major clients Concentration Risk, Percentage TXSE - private investment TXSE - private investment TXSE - private investment Principles of consolidation Consolidation, Policy [Policy Text Block] Stock-based compensation expense Restricted stock expense Share-Based Payment Arrangement, Noncash Expense Business Combination Consideration Transferred - Broadmark Business Combination Consideration Transferred - Broadmark Business Combination Consideration Transferred - Broadmark Schedule Of Property Plant And Equipment [Table] Property, Plant and Equipment [Table] Prepaid Taxes Prepaid Taxes Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Income Taxes Paid Income Taxes Paid Deferred Tax Liabilities, Financing Arrangements Deferred Tax Liabilities, Financing Arrangements Antidilutive Securities Antidilutive Securities [Axis] Contractual Rights Contractual Rights [Member] Total Westwood Holdings Group, Inc. stockholders’ equity BALANCE BALANCE Equity, Attributable to Parent Other comprehensive income (loss), net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Property and Equipment Property, Plant and Equipment [Table Text Block] Common stock, shares authorized Common Stock, Shares Authorized LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] Cover [Abstract] Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Maximum [Member] Maximum [Member] Property and equipment Property, Plant and Equipment, Net [Abstract] Total [Domain] Total [Member] Total [Domain] Net Income (Loss) Attributable to Noncontrolling Interest Net Income (Loss) Attributable to Noncontrolling Interest Issuance of treasury stock under employee stock plans, shares Shares Issued, Shares, Share-Based Payment Arrangement, before Forfeiture Intangible assets, net Net Carrying Amount Finite-Lived Intangible Assets, Net Repatriation Earnings and Profits Repatriation Earnings and Profits Repatriation Earnings and Profits Restricted Stock Restricted Shares Subject Only to a Service Condition Restricted Stock [Member] Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] CONCENTRATION Concentration Risk Disclosure [Text Block] Status and Changes in Restricted Stock Grants that Subject to Service Condition Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Net change in unrealized appreciation on investments Unrealized gains/(losses) Trading Securities, Change in Unrealized Holding Gain (Loss) (Deprecated 2023) Investment Owned, at Fair Value Investment Owned, Fair Value Other Assets Other Assets [Member] Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income (loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Proceeds from Sale of Property, Plant, and Equipment Proceeds from Sale of Property, Plant, and Equipment Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings Loss Contingency Nature Loss Contingency Nature [Axis] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Operating Segments Operating Segments [Member] Finite-lived intangibles, expected amortization, thereafter Finite-lived intangibles, expected amortization, thereafter Finite-lived intangibles, expected amortization, thereafter Accumulated Other Comprehensive Income (Loss), Tax Accumulated Other Comprehensive Income (Loss), Tax Accumulated Other Comprehensive Income (Loss), Tax Payments to Noncontrolling Interests Payments to Noncontrolling Interests Accrued Income Taxes, Noncurrent Accrued Income Taxes, Noncurrent 2019 Operating Leases, Future Minimum Payments Due, Next 12 Months U.S. Income (Loss) from Continuing Operations before Income Taxes, Domestic Total Expense Recorded for Stock Based Compensation Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Operating Lease, Liability, Current Operating Lease, Liability, Current Service condition restricted stock expense Restricted Shares Subject To Service Condition [Member] Restricted shares subject to service condition. Entity Address, Address Description Entity Address, Address Description Operating lease liabilities Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Deferred Rent Internally developed software Software and Software Development Costs [Member] Document Fiscal Period Focus Document Fiscal Period Focus Accounts Receivable Receivable [Policy Text Block] Litigation Case Litigation Case [Domain] Furniture and fixtures Furniture and Fixtures [Member] Adjustments for New Accounting Pronouncements [Axis] Accounting Standards Update [Axis] Award Type [Axis] Award Type [Axis] Stock Based Compensation Share-Based Payment Arrangement [Policy Text Block] Trading Symbol Trading Symbol Lessee, Operating Lease, Liability, Payments, Due Year Four Lessee, Operating Lease, Liability, to be Paid, Year Four Business Combinations Business Combination [Policy Text Block] Liability for Uncertainty in Income Taxes, Current Liability for Uncertainty in Income Taxes, Current Entity Address, City or Town Entity Address, City or Town Total payments due Operating Leases, Future Minimum Payments Due Special Damage Special Damage [Member] Special damage. Total deferred tax assets Deferred Tax Assets, Net of Valuation Allowance Statement of Income Location, Balance [Domain] Statement of Income Location, Balance [Domain] Severance Costs Severance Costs Unobservable input - growth discount rate - minimum Unobservable input - growth discount rate - minimum Unobservable input - growth discount rate - minimum Estimated merger consideration Business Combination, Consideration Transferred Canadian Plan restricted stock expense Canadian Plan Restricted Stock Expense [Member] Canadian plan restricted stock expense. SCLP net capital excess SCLP net capital excess SCLP net capital excess Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities Entity Emerging Growth Company Entity Emerging Growth Company Payments to Acquire Intangible Assets Payments to Acquire Intangible Assets Investment in NHBC Investment in NHBC Investment in NHBC Revenue from Contract with Customer, Including Assessed Tax Revenue from Contract with Customer, Including Assessed Tax Mutual Fund Advisory [Member] [Member] Mutual Fund Advisory [Member] [Member] Mutual Fund Advisory [Member] [Member] Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases Dilutive potential shares from contingent consideration (in shares) Incremental Common Shares Attributable to Dilutive Effect of Contingently Issuable Shares Common stock, shares outstanding BALANCE, shares BALANCE, shares Common Stock, Shares, Outstanding Disaggregation of Revenue [Table Text Block] Disaggregation of Revenue [Table Text Block] Finite-Lived Intangible Assets Disposed [Abstract] Finite-Lived Intangible Assets Disposed [Abstract] Finite-Lived Intangible Assets Disposed [Abstract] Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Total assets measured at fair value Fair Value, Net Asset (Liability) Income taxes payable Accrued Income Taxes, Current Estimated Amortization Expense for Intangible Assets over the Next Five Years Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Net increase (decrease) in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) (Deprecated 2022) Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes. Restricted shares subject only to a service condition: Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Provision for income taxes Income tax provision Income Tax Expense (Benefit) Future Contractual Rental Payments for Non-Cancelable Operating Leases Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Other Assets Other Assets Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Required combined cash and receivables Foreign Financial Institutions, Mandated Reserve Amount Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Property and equipment cost Property, Plant and Equipment, Gross Property, Plant and Equipment Property, Plant and Equipment [Member] Institutional Institutional [Member] Institutional. Discontinued Operations and Disposal Groups [Abstract] Discontinued Operations and Disposal Groups [Abstract] Other assets Increase (Decrease) in Other Current Assets Asset Management [Member] Asset Management [Member] Retirement plan matching contributions Defined Contribution Plan, Employer Discretionary Contribution Amount Effective Income Tax Rate Reconciliation, Nondeductible Expense, Life Insurance, Percent Effective Income Tax Rate Reconciliation, Nondeductible Expense, Life Insurance, Percent Global Intangible Low Taxed Income, Percent Global Intangible Low Taxed Income, Percent Global Intangible Low Taxed Income, Percent Goodwill Acquired Goodwill, Acquired During Period Sale of investments Payments to Acquire Businesses, Net of Cash Acquired Payments to Acquire Businesses, Net of Cash Acquired Dividends declared, per share Dividends Payable, Amount Per Share Deferred Compensation Share Based Payments Deferred Compensation, Share-Based Payments [Member] Non-compete agreements Non-compete agreements Non-compete agreements Restricted stock, Section 162(m) impact Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Nonvested restricted shares (in shares) Non-vested, January 1, 2015 (in shares) Non-vested, December 31, 2015 (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] General Damage General Damage [Member] General damage. Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Proceeds from Insurance Settlement, Investing Activities Proceeds from Insurance Settlement, Investing Activities Long-term Investments Long-Term Investments Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation [Axis] Estimated useful lives of the assets Property, Plant and Equipment, Useful Life Subsequent Event Subsequent Event [Member] Fee revenues from Westwood VIEs Variable Interest Entity, Measure of Activity, Revenues Depreciation Depreciation Money market funds Money Market Funds [Member] Schedule of Investments [Abstract] Schedule of Investments [Abstract] Business Combination, Separately Recognized Transactions, Expenses and Losses Recognized Business Combination, Separately Recognized Transactions, Expenses and Losses Recognized Equity Components [Axis] Equity Components [Axis] Property Plant And Equipment [Line Items] Property, Plant and Equipment [Line Items] Sublease Income Sublease Income Stock Issued During Period, Value, Restricted Stock Award, Gross Stock Issued During Period, Value, Restricted Stock Award, Gross Earnings per share: Earnings Per Share, Basic and Diluted [Abstract] (Deprecated 2022) Number of operating segments Number of Reportable Segments Contract with Customer, Basis of Pricing [Axis] Contract with Customer, Basis of Pricing [Axis] EMPLOYEE BENEFITS Compensation and Employee Benefit Plans [Text Block] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Share-based Liabilities Paid Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Share-Based Liabilities Paid Share Pretax Income Goal Sliding Scale Award Share Pretax Income Goal Sliding Scale Award Share Pretax Income Goal Sliding Scale Award Broadmark Asset Management LLC [Domain] Broadmark Asset Management LLC [Domain] Broadmark Asset Management LLC [Domain] VARIABLE INTEREST ENTITIES Variable Interest Entity Disclosure [Text Block] Entity Address, State or Province Entity Address, State or Province Interest and Dividend Income, Operating Interest and Dividend Income, Operating Operating Lease, Impairment Loss Operating Lease, Impairment Loss Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Antidilutive Security, Excluded EPS Calculation [Table] Effective Income Tax Rate Reconciliation, Tax Contingency, State and Local, Percent Effective Income Tax Rate Reconciliation, Tax Contingency, State and Local, Percent Dividends declared ($2.07 in 2015, $1.82 per share in 2014, $1.64 per share in 2013) Dividends, Common Stock Total current liabilities Liabilities, Current Noncash Tenant Improvements Noncash Tenant Improvements Noncash Tenant Improvements Private Equity Investment Commitment Private Equity Investment Commitment Private Equity Investment Commitment Restricted stock issued Stock Issued During Period, Shares, Restricted Stock Award, Gross 2022 Operating Leases, Future Minimum Payments, Due in Four Years Accounting Changes and Error Corrections [Abstract] Accounting Changes and Error Corrections [Abstract] Document Annual Report Document Annual Report Entities [Table] Entities [Table] Variable Interest Entity [Member] Variable Interest Entity [Member] Variable interest entity. Total reportable segments Total reportable segments Total reportable segments Deferred Other Tax Expense (Benefit) Deferred taxes on goodwill Deferred Other Tax Expense (Benefit) Subsidiary, Ownership Percentage, Noncontrolling Owner Subsidiary, Ownership Percentage, Noncontrolling Owner Entity Interactive Data Current Entity Interactive Data Current Due from related party Due from Related Parties (Deprecated 2023) Lessee, Operating Lease, Disclosure Lessee, Operating Lease, Disclosure [Table Text Block] Loss Contingency, Nature Loss Contingency, Nature [Domain] Mutual Fund [Member] Mutual Fund [Member] Asset Acquisition, Contingent Consideration, Liability Asset Acquisition, Contingent Consideration, Liability Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Amount Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-Based Payment Arrangement, Amount Business Combination, Contingent Consideration, Type [Axis] Business Combination, Contingent Consideration, Type [Axis] Investment Owned, at Cost Investment Owned, Cost Finite-Lived Intangible Assets, Remaining Amortization Period Finite-Lived Intangible Assets, Remaining Amortization Period Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Property, Plant and Equipment, Type Long-Lived Tangible Asset [Axis] performance fee [Member] performance fee [Member] performance fee [Member] Total investments Total investments Total investments Other Assets, Noncurrent Other Assets, Noncurrent Growth earn-out Growth earn-out Growth earn-out Customer [Domain] Customer [Domain] Debt Securities, Trading, Amortized Cost Debt Securities, Trading, Amortized Cost Entity Central Index Key Entity Central Index Key Total revenues Total revenues Revenues Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax Purchase Obligation, to be Paid, Year Two Purchase Obligation, to be Paid, Year Two Supplemental cash flow information: Supplemental Cash Flow Elements [Abstract] Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Schedule Of Segment Reporting Information By Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Share-based Compensation Award, Tranche One Share-Based Payment Arrangement, Tranche One [Member] Business Combination, Separately Recognized Transaction, Acquisition-Related Cost, Expensed Business Combination, Separately Recognized Transaction, Acquisition-Related Cost, Expensed Unobservable input - revenue retention discount rate - weighted average Unobservable input - revenue retention discount rate - weighted average Unobservable input - revenue retention discount rate - weighted average Entity Filer Category Entity Filer Category Remaining unrecognized compensation cost Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount U.S. Federal corporate tax rate Income tax provision computed at US federal statutory rate, effective tax rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Subsequent Event Type Subsequent Event Type [Axis] Contingent consideration Business Combination, Contingent Consideration, Liability, Current Investment balances Debt Securities, Trading, Restricted [Abstract] Gross Unrealized Gains Trading Securities, Unrealized Holding Gain Trading Securities, Unrealized Holding Gain (Deprecated 2023) 2021 Finite-Lived Intangible Asset, Expected Amortization, Year Three Vesting Vesting [Domain] Deferred tax assets: Deferred Tax Assets, Net [Abstract] Gross Carrying Amount Finite-Lived Intangible Assets, Gross Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Noncontrolling Interest AOCI Attributable to Parent [Member] Number of vested shares from employees on the date vesting Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Investments Investments [Domain] Unrecognized Tax Benefits, Period Increase (Decrease) Unrecognized Tax Benefits, Period Increase (Decrease) Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] Private investment fund Private Equity Funds, US [Member] Finite-Lived Intangible Assets Disposed [Line Items] Finite-Lived Intangible Assets Disposed [Line Items] [Line Items] for Finite-Lived Intangible Assets Disposed [Table] Effective Income Tax Rate Reconciliation, Tax Contingency, Amount [Abstract] Effective Income Tax Rate Reconciliation, Tax Contingency, Amount [Abstract] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Other Revenue Misc Services [Member] Other Revenue Misc Services [Member] Other Revenue Misc Services [Member] Employee Benefits and Share-based Compensation Employee Benefits and Share-Based Compensation Effective Income Tax Rate Reconciliation, Tax Contingency, Amount Effective Income Tax Rate Reconciliation, Tax Contingency, Amount Employee compensation and benefits Labor and Related Expense Investment carrying value - Vista Investment carrying value - Vista Investment carrying value - Vista Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Payments to Acquire Investments Payments to Acquire Investments Relationship to Entity Title and Position [Domain] Total expenses Costs and Expenses Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Related Party Transaction [Line Items] Related Party Transaction [Line Items] Finite-Lived Intangible Assets Sold, Gross Finite-Lived Intangible Assets Sold, Gross Finite-Lived Intangible Assets Sold, Gross Fair Value Inputs, Liabilities, Quantitative Information Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Unobservable input - book value multiple - minimum [Abstract] Unobservable input - book value multiple - minimum Unobservable input - book value multiple - minimum Lessee, Operating Lease, Liability, Payments, Due Year Two Lessee, Operating Lease, Liability, to be Paid, Year Two Investments, All Other Investments [Abstract] Investments, All Other Investments [Abstract] Investment Type Investment Type [Axis] Investments Investments New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification (Deprecated 2020) Represents the quantification of the effect of adopting the new accounting standard or change in accounting principle expected by the entity to have a significant effect on the entity's financial statements. Finite-Lived Intangible Assets, Net Finite-Lived Intangible Assets Sold, Net Finite-Lived Intangible Assets Sold, Net Number of shares purchased in the open market Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Purchased for Award Closing sate consideration paid in cash Payments to Acquire Businesses, Gross Debt Securities, Trading, Unrealized Gain Debt Securities, Trading, Unrealized Gain Deferred Tax Liabilities, Leasing Arrangements Deferred Tax Liabilities, Leasing Arrangements Other Intangible Assets Other Intangible Assets [Member] 2023 Operating Leases, Future Minimum Payments, Due in Five Years Equity Award [Domain] Award Type [Domain] Leasehold improvements Leasehold Improvements [Member] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Other Income Other Income CANADA Canada CANADA Unrecorded Unconditional Purchase Obligation, Due after Five Years Unrecorded Unconditional Purchase Obligation, to be Paid, after Year Five Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Performance​ Based​ Restricted​ Shares​ For Future Performance Years Performance Based Restricted Shares For Future Performance Years [Member] Performance​ based​ restricted​ shares​ for future performance years. Effective Income Tax Rate Reconciliation,Other Reconciling Items, Percent Effective Income Tax Rate Reconciliation, Other Reconciling Items, Percent Litigation Settlement, Fee Expense Litigation Settlement, Fee Expense Zarvona Energy Fund GP, L.P. [Domain] Zarvona Energy Fund GP, L.P. [Domain] Zarvona Energy Fund GP, L.P. [Domain] Net realized gains (losses) Trading Securities, Realized Gain (Loss) (Deprecated 2023) Compensation and benefits payable Increase (Decrease) in Employee Related Liabilities Future contractual rental payments for non-cancelable operating leases Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] Schedule Of Investments [Line Items] Schedule of Investments [Line Items] Canadian rate differential, effective tax rate Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent AUSTRALIA AUSTRALIA Business Combination, Recognized Asset Acquired, Deferred Tax Asset Business Combination, Recognized Asset Acquired, Deferred Tax Asset Non-cash accrued contingent consideration Business Combination, Contingent Consideration, Change in Contingent Consideration, Liability, Increase (Decrease) Weighted average shares outstanding: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Revenues: Revenues [Abstract] Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Sales and marketing Selling and Marketing Expense Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Percent Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Percent Realized gains Trading Securities, Realized Gain (Deprecated 2023) Gain (Loss) on Sale of Leased Assets, Net, Operating Leases Gain (Loss) on Sale of Leased Assets, Net, Operating Leases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Performance Shares Performance Shares [Member] Components of accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount SCLP minimum net capital SCLP minimum net capital SCLP minimum net capital Business Combination, Achieved in Stages, Preacquisition and Acquired Equity Interests in Acquiree, Percentage Business Combination, Achieved in Stages, Preacquisition and Acquired Equity Interests in Acquiree, Percentage Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Minimum [Member] Minimum [Member] Goodwill, Measurement Period Adjustment Goodwill, Measurement Period Adjustment Schedule Of Available For Sale Securities [Table] Schedule of Available-for-Sale Securities [Table] (Deprecated 2023) Business Combination, Pro Forma Information, Pro Forma Income (Loss), after Tax Business Combination, Pro Forma Information, Pro Forma Income (Loss), after Tax Percentage of defense costs which will be covered by insurance Percentage Of Defense Costs Covered By Insurance Percentage of defense costs covered by insurance. Profit-sharing contributions, net Profit Sharing Contribution Profit sharing contribution. Minimum capital requirement Banking Regulation, Total Risk-Based Capital, Capital Adequacy, Minimum Deferred tax liabilities: Deferred Tax Liabilities, Net [Abstract] Operating Lease, Payments Operating Lease, Payments Treasury Stock, Shares, Acquired, Employee Stock Plan Treasury Stock, Shares, Acquired, Employee Stock Plan Treasury Stock, Shares, Acquired, Employee Stock Plan Dividends payable Dividends Payable Unvested mutual fund awards Unvested mutual fund awards Unvested mutual fund awards Variable Interest Entities [Abstract] Variable Interest Entities [Abstract] Variable interest entities. Unobservable input - revenue retention volatility - weighted average Unobservable input - revenue retention volatility - weighted average Unobservable input - revenue retention volatility - weighted average Current Foreign Tax Expense (Benefit) Current Foreign Tax Expense (Benefit) Changes in goodwill Goodwill [Roll Forward] State and local taxes paid - Massachusetts State and local taxes paid - Massachusetts State and local taxes paid - Massachusetts COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Share-based Compensation Award, Tranche Two Share-Based Payment Arrangement, Tranche Two [Member] Diluted (in shares) Weighted average shares outstanding – diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Business Combination - Broadmark Revenues includedin Earnings Business Combination - Broadmark Revenues includedin Earnings Business Combination - Broadmark Revenues includedin Earnings Entity Small Business Entity Small Business Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] (Gain) loss from change in fair value of contingent consideration Other Cost and Expense, Operating Weighted-average grant date fair value for shares granted and the total fair value of shares vested Share Based Compensation Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value And Fair Value Of Shares Vested [Abstract] Purchase Obligation, to be Paid, Year Four Purchase Obligation, to be Paid, Year Four Current State and Local Tax Expense (Benefit) Current State and Local Tax Expense (Benefit) Document Transition Report Document Transition Report Business Combination, Recognized Asset Acquired, Other Asset, Noncurrent Business Combination, Recognized Asset Acquired, Other Asset, Noncurrent Concentration Schedules of Concentration of Risk, by Risk Factor [Table Text Block] Profit Sharing and 401(k) Contributions for the Periods Defined Contribution Plan Disclosures [Table Text Block] Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date Effect of currency rate changes on cash Effect of Exchange Rate on Cash and Cash Equivalents (Deprecated 2022) Amount of increase (decrease) from the effect of exchange rate changes on cash and cash equivalent balances held in foreign currencies. INCOME TAXES Income Tax Disclosure [Text Block] Payment for Contingent Consideration Liability, Financing Activities Payment for Contingent Consideration Liability, Financing Activities Schedule Of Investments [Table] Schedule of Investments [Table] Mutual fund vesting period Share Based Compensation Arrangement With Individual Requisite Service Period Share based compensation arrangement with individual requisite service period. Stockholders' Equity, Total Equity, Including Portion Attributable to Noncontrolling Interest Treasury Stock Acquired, Average Cost Per Share Shares Acquired, Average Cost Per Share Risks and Uncertainties [Abstract] Risks and Uncertainties [Abstract] Document Type Document Type Level 3 Fair Value, Inputs, Level 3 [Member] EARNINGS PER SHARE Earnings Per Share [Text Block] Loss Contingencies [Table] Loss Contingencies [Table] Product and Service [Axis] Product and Service [Axis] Asset Acquisition [Domain] Asset Acquisition [Domain] Business Combination, Contingent Consideration, Type [Domain] Business Combination, Contingent Consideration, Type [Domain] Revenue from Contract with Customer, Excluding Assessed Tax Revenue from Contract with Customer, Excluding Assessed Tax Revenue from Contract with Customer, Excluding Assessed Tax Asset Acquisition, Consideration Transferred Asset Acquisition, Consideration Transferred Total current assets Assets, Current Range [Axis] Statistical Measurement [Axis] Share Repurchase Program, Authorized, Amount Share Repurchase Program, Authorized, Amount Business Combination, Separately Recognized Transactions, Revenues and Gains Recognized Business Combination, Separately Recognized Transactions, Revenues and Gains Recognized Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation Disposal Group Name [Axis] Disposal Group Name [Axis] Restricted stock returned for payment of taxes Payment, Tax Withholding, Share-Based Payment Arrangement Change in uncertain tax positions, net of federal income taxes, effective tax rate Effective Income Tax Rate Reconciliation, Tax Contingency, Domestic, Percent Entity Information [Line Items] Entity Information [Line Items] Contract with Customer, Duration [Domain] Contract with Customer, Duration [Domain] Current Liabilities: Liabilities, Current [Abstract] Business Combination, Achieved in Stages, Preacquisition Equity Interest in Acquiree, Percentage Business Combination, Achieved in Stages, Preacquisition Equity Interest in Acquiree, Percentage Other Liabilities, Fair Value Disclosure Other Liabilities, Fair Value Disclosure Operating Expenses Total expenses Operating Expenses Unobservable input - revenue retention discount rate - maximum Unobservable input - revenue retention discount rate - maximum Unobservable input - revenue retention discount rate - maximum 2020 Operating Leases, Future Minimum Payments, Due in Two Years Vesting period Defined Contribution Plan Specified Period Of Service For Employer Profit Sharing Contributions To Be Fully Vested Defined contribution plan specified period of service for employer profit sharing contributions to be fully vested. Level 1 Fair Value, Inputs, Level 1 [Member] Profit sharing and 401(k) contributions for the periods Profit Sharing And Contributions [Abstract] Business Acquisitions - Salient, Pro Forma Revenue Business Acquisitions - Salient, Pro Forma Revenue Business Acquisitions - Salient, Pro Forma Revenue Share Based Compensation Award Tranche Four Share Based Compensation Award Tranche Four [Member] Share based compensation award tranche four. Schedule Of Related Party Transactions By Related Party [Table] Related Party Transaction [Table] Diluted (in dollars per share) Diluted earnings per common share (in dollars per share) Earnings Per Share, Diluted Unrealized gain on private equity investment Unrealized gain on private equity investment Unrealized gain on private equity investment Accounts receivable Accounts Receivable, after Allowance for Credit Loss, Current Insurance Settlement [Member] Insurance Settlement [Member] Unobservable input - revenue retention discount rate - minimum Unobservable input - revenue retention discount rate - minimum Unobservable input - revenue retention discount rate - minimum Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount Treasury Stock, Common, Shares Treasury Stock, Common, Shares Consolidation Items [Domain] Consolidation Items [Domain] Mutual fund award liability Mutual fund award liability Mutual fund award liability Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Auditor Location Auditor Location Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Amount Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Amount Asset Acquisition [Table] Asset Acquisition [Table] Zarvona Energy Fund II-A, L.P. [Domain] Zarvona Energy Fund II-A, L.P. [Domain] Zarvona Energy Fund II-A, L.P. [Domain] Realized gains on private investments Realized gains on private investments Realized gains on private investments Business Acquisitions - Salient, Net Income (Loss0 Business Acquisitions - Salient, Net Income (Loss0 Business Acquisitions - Salient, Net Income (Loss0 Contract with Customer, Sales Channel [Axis] Contract with Customer, Sales Channel [Axis] Lessee, Operating Lease, Liability, Undiscounted Excess Amount Lessee, Operating Lease, Liability, Undiscounted Excess Amount Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Percent Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Percent Cash paid during the year for income taxes Income Taxes Paid, Net 2020 Finite-Lived Intangible Asset, Expected Amortization, Year Two Economic Earnings (Loss) Economic Earnings Losses Economic Earnings is a non-U.S. generally accepted accounting principles (“non-GAAP”) performance measure of segment profit or loss. We provide this measure in addition to, but not as a substitute for, net income, which is reported on a U.S. GAAP basis. Both our management and Board of Directors review Economic Earnings to evaluate our ongoing performance, allocate resources and review dividend policy. We believe that this non-GAAP performance measure of segment profit or loss, while not a substitute for GAAP net income, is useful for management and investors when evaluating our underlying operating and financial performance and our available resources. We do not advocate that investors consider this non-GAAP measure of segment profit or loss without considering financial information prepared in accordance with GAAP. Unrealized Gain (Loss) on Securities Unrealized Gain (Loss) on Securities (Deprecated 2023) Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Compensation and benefits payable Employee-related Liabilities, Current Lessee, Operating Lease, Liability, Payments, Due Lessee, Operating Lease, Liability, to be Paid Advisory Segment Goodwill Advisory Segment Goodwill Advisory Segment Goodwill Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Service condition restricted stock expense Stock Based Compensation Expense Subject To Service Condition [Member] Stock based compensation expense subject to service condition. Trade Names [Member] Trade Names [Member] Other Intersegment Eliminations [Member] Operating lease liabilities Increase (Decrease) in Other Operating Liabilities Other revenue Other revenue Other revenue 2023 Finite-Lived Intangible Asset, Expected Amortization, Year Five Related Party Transaction, Amounts of Transaction Related Party Transaction, Amounts of Transaction Property and equipment, net of accumulated depreciation of $_,___ and $10,078 Net property and equipment Property, Plant and Equipment, Net Unrecorded Unconditional Purchase Obligation, Due in Next Twelve Months Unrecorded Unconditional Purchase Obligation, to be Paid, Year One Accounts receivable Increase (Decrease) in Accounts Receivable WEBs - preferred stock WEBs - preferred stock WEBs - preferred stock Asia [Member] Asia [Member] Fair Value Hierarchy Including NAV [Domain] Fair Value Hierarchy Including NAV [Domain] [Domain] for Fair Value Hierarchy Including NAV [Axis] Entity Current Reporting Status Entity Current Reporting Status Unobservable input - revenue retention volatility - minimum Unobservable input - revenue retention volatility - minimum Unobservable input - revenue retention volatility - minimum Variable Interest Entity, Classification Consolidated Entities [Domain] Loss on Contract Termination Loss on Contract Termination Income tax provision computed at US federal statutory rate Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Banking Regulation, Tangible Capital, Excess, Actual Banking Regulation, Tangible Capital, Excess, Actual Restricted stock returned for payment of taxes, shares Restricted Stock, Shares Issued Net of Shares for Tax Withholdings Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Type of Adoption [Domain] Accounting Standards Update [Domain] Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Percent Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-Based Payment Arrangement, Percent State and local income taxes, net of federal income taxes, effective tax rate Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent Limited Liability Company [Member] Limited Liability Company [Member] Noncontrolling Interest Partners' Capital Attributable to Noncontrolling Interest Accrued liability Mutual Fund Incentive Award Liability Mutual fund incentive award liability. Unrealized gains on investments Deferred Tax Liabilities, Unrealized Gains on Trading Securities Current Fiscal Year End Date Current Fiscal Year End Date Tax Reform [Table] Tax Reform [Table] Tax Reform [Table] Accrued dividends Dividends Payable Non Current Dividends payable non current. Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Insurance proceeds Proceeds from Insurance Settlement, Operating Activities Income (loss) before income taxes by jurisdiction Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest [Abstract] Shares remain available for issuance Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Professional services Professional Fees Other Noncontrolling Interests Other Noncontrolling Interests Interest income – trading Interest and Dividend Income, Securities, Operating, Trading or Measured at Fair Value (Deprecated 2023) Business Combination, Acquisition of Less than 100 Percent of Broadmark, Noncontontrolling Interest Business Combination, Acquisition of Less than 100 Percent of Broadmark, Noncontontrolling Interest Business Combination, Acquisition of Less than 100 Percent of Broadmark, Noncontontrolling Interest Performance-based restricted stock expense Stock Based Compensation Expense Subject To Performance Condition [Member] Stock based compensation expense subject to performance condition. Excess from Minimum capital requirement Banking Regulation, Total Risk-Based Capital, Excess, Actual Private Wealth Advisory [Member] Private Wealth Advisory [Member] Private Wealth [Member] Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent Equity Securities, FV-NI Equity Securities, FV-NI, Current Timing of Transfer of Good or Service [Domain] Timing of Transfer of Good or Service [Domain] Stock Issued During Period, Value, Acquisitions Stock Issued During Period, Value, Acquisitions Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less) Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less) Uncertain tax position Unrecognized Tax Benefits, Beginning Balance Unrecognized Tax Benefits, Ending Balance Unrecognized Tax Benefits Anti-dilutive restricted shares or options Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Unrecorded Unconditional Purchase Obligation Unrecorded Unconditional Purchase Obligation Investment Owned, at Fair Value Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value Accounts payable and accrued liabilities Accounts Payable and Accrued Liabilities, Current Accounts Payable and Accrued Liabilities, Current Lessee, Operating Leases Lessee, Operating Leases [Text Block] Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Unrecognized deferred tax liability Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries Effective Income Tax Rate Reconciliation, Nondeductible Expense, Life Insurance, Amount Effective Income Tax Rate Reconciliation, Nondeductible Expense, Life Insurance, Amount Property, Plant and Equipment, Type Long-Lived Tangible Asset [Domain] Issuance of restricted stock, net of forfeitures Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Share Repurchase Program, Remaining Authorized, Amount Share Repurchase Program, Remaining Authorized, Amount Disposal Group Classification [Domain] Disposal Group Classification [Domain] Total reporting segment Total reporting segment Total reporting segment Investment Income, Investment Expense Investment Income, Investment Expense Entity Tax Identification Number Entity Tax Identification Number Effective Income Tax Rate Reconciliation, Tax Credit, Percent Effective Income Tax Rate Reconciliation, Tax Credit, Percent Effective Income Tax Rate Reconciliation, Tax Credit, Percent Asset Acquisition [Axis] Asset Acquisition [Axis] Variable Interest Entities Schedule of Variable Interest Entities [Table Text Block] Unrealized gains (losses) on private investments Unrealized gains (losses) on private investments Unrealized gains (losses) on private investments Long Term Investment, at Cost, in Private Equity Long Term Investment, at Cost, in Private Equity Long Term Investment, at Cost, in Private Equity Common stock, shares issued Common Stock, Shares, Issued Unrecognized tax benefits Accrued contingent consideration Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Contingencies Treasury Stock Treasury Stock [Member] (Deprecated 2023) Lawsuit filing date Loss Contingency, Lawsuit Filing Date Operating Lease, Weighted Average Remaining Lease Term Operating Lease, Weighted Average Remaining Lease Term Goodwill and Other Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Unrealized Loss on Securities Unrealized Loss on Securities (Deprecated 2023) Dividends payable Dividends Payable, Current Entity Public Float Entity Public Float Changes in Goodwill Schedule of Goodwill [Table Text Block] Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract] Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract] Foreign Currency Translation Adjustment, Description Foreign Currency Translation Adjustment, Description Loss Contingencies [Line Items] Loss Contingencies [Line Items] Cost Trading Securities, Cost Trading Securities, Cost (Deprecated 2023) Fees unpaid from related party Accounts Receivable, Related Parties, Current (Deprecated 2023) Total Reportable Segments Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Security Exchange Name Security Exchange Name Payments to Acquire Additional Interest in Subsidiaries Payments to Acquire Additional Interest in Subsidiaries Total long-term liabilities Liabilities, Noncurrent State and local taxes paid - New York State and local taxes paid - New York State and local taxes paid - New York Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount Restricted stock expense under the Plan Stock Based Compensation Expense [Member] Stock based compensation expense. Business Combination, Consideration Transferred, Equity Interest, Type [Domain] Business Combination, Consideration Transferred, Equity Interest, Type [Domain] Defined Benefit Plan, Plan Assets, Category [Domain] Defined Benefit Plan, Plan Assets, Category [Domain] Stock Repurchased During Period, Shares Stock Repurchased During Period, Shares Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-Lived Intangible Assets, Major Class Name [Domain] Expenses: Operating Expenses [Abstract] Asset Class [Domain] Asset Class [Domain] Business Combination, Achieved in Stages, Preacquisition Equity Interest in Acquiree, Fair Value Business Combination, Achieved in Stages, Preacquisition Equity Interest in Acquiree, Fair Value Unobservable input - book value multiple - maximum [Abstract] Unobservable input - book value multiple - maximum Unobservable input - book value multiple - maximum Statement [Line Items] Statement [Line Items] Cost-method Investments, Realized Gains Cost-method Investments, Realized Gains (Deprecated 2023) Cash and cash equivalents Cash and cash equivalents, beginning of year Cash and cash equivalents, end of year Cash and Cash Equivalent Restricted stock returned for payment of taxes Restricted Stock, Value, Shares Issued Net of Tax Withholdings Subsequent Event [Line Items] Subsequent Event [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized Deferred income taxes Increase (Decrease) in Deferred Income Taxes Westwood Holdings Group, Inc. Common Stock, Par Common Stock [Member] Vested, shares Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Variable Interest Entities Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net [Abstract] (Deprecated 2020) Business Combination, Recognized Asset Acquired, Asset, Current Business Combination, Recognized Asset Acquired, Asset, Current Unrealized Gain (Loss) on Investments Unrealized Gain (Loss) on Investments SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Tax Reform [Line Items] Tax Reform [Line Items] [Line Items] for Tax Reform [Table] Range [Domain] Statistical Measurement [Domain] Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment Other Current Assets Other Current Assets [Member] Lessee, Operating Lease, Liability, Payments, Due after Year Five Lessee, Operating Lease, Liability, to be Paid, after Year Five Restricted Stock Award, Forfeitures Restricted Stock Award, Forfeitures Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Percent Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Percent Salient MLP Total Return TE Fund, L.P. [Domain] Salient MLP Total Return TE Fund, L.P. [Domain] Salient MLP Total Return TE Fund, L.P. [Domain] Business Combination, Goodwill, Expected Tax Deductible, Amount Business Combination, Goodwill, Expected Tax Deductible, Amount Asset Class [Axis] Asset Class [Axis] Leases [Abstract] Benefit Plans [Member] Benefit Plans [Member] Benefit plans. Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Gain on sale of operations Gain on sale of operations Gain on sale of operations Interest Income, Interest-Earning Asset Interest Income, Interest-Earning Asset Contract with Customer, Asset, Net, Current Contract with Customer, Asset, after Allowance for Credit Loss, Current Unrecorded Unconditional Purchase Obligations Disclosure Unrecorded Unconditional Purchase Obligations Disclosure [Table Text Block] Basic (in dollars per share) Basic earnings per common share (in dollars per share) Earnings Per Share, Basic Other Revenue, Net Other Revenue, Net Other Revenue, Net Unobservable input - growth discount rate - maximum Unobservable input - growth discount rate - maximum Unobservable input - growth discount rate - maximum Accounts payable and accrued liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Net cash used in financing activities Cash Provided by (Used in) Financing Activity, Continuing Operation Other comprehensive income (loss) Acquisition Other Comprehensive Income (Loss), Net of Tax Intersegment Balances Schedule of Segment Reporting Information, by Segment [Table Text Block] Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document and entity information. Finite-Lived Intangible Assets, Accumulated Amortization Finite-Lived Intangible Assets Sold, Accumulated Amortization Finite-Lived Intangible Assets Sold, Accumulated Amortization Computer hardware and office equipment Computer Hardware And Office Equipment [Member] Computer hardware and office equipment. Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits Information technology Communications and Information Technology Cash and Cash Equivalents Cash and Cash Equivalents [Member] Gain on Sale of Investments Gain on Sale of Investments Unobservable input - growth volatility - weighted average Unobservable input - growth volatility - weighted average Unobservable input - growth volatility - weighted average Equity investments Corporate Investment Debt Securities, Trading, and Equity Securities, FV-NI Proceeds from Sale of Other Investments Proceeds from Sale of Other Investments Payments to Acquire Equity Method Investments Payments to Acquire Equity Method Investments Issuance of treasury stock under employee stock plans Shares Issued, Value, Share-Based Payment Arrangement, before Forfeiture Compensation expense recorded Add: Restricted stock expense Share-Based Payment Arrangement, Expense Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] State and local taxes paid - Texas State and local taxes paid - Texas State and local taxes paid - Texas Current Assets: Assets, Current [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period Total liabilities and stockholders’ equity Liabilities and Equity Long Term Investments, Cost, in a private company. Long Term Investments, Cost, in a private company. Long Term Investments, Cost, in a private company. Currency Translation Foreign Currency Transactions and Translations Policy [Policy Text Block] Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Issuance of common stock for acquisition, shares Stock Issued During Period, Shares, Acquisitions Concentration Risk Benchmark Concentration Risk Benchmark [Axis] Other Deferred Tax Assets, Other General and Administrative Expense [Member] General and Administrative Expense [Member] Total reportable segments Total reportable segments [Member] Total reportable segments Accounting Policies [Abstract] Accounting Policies [Abstract] Lessee, Operating Lease, Liability, Maturity Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Concentration Risk Type Concentration Risk Type [Domain] Net intersegment revenues Net Intersegment Revenues Net intersegment revenues. Unrealized Gain on Securities Unrealized Gain on Securities (Deprecated 2023) Fair value of vested shares Fair value of shares vested (in thousands) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Combined cash and receivables Foreign Financial Institutions, Actual Reserve Amount Adjustments to Additional Paid in Capital, Income Tax Deficiency from Share-based Compensation Adjustments to Additional Paid in Capital, Income Tax Deficiency from Share-Based Compensation (Deprecated 2022) Amount of decrease in additional paid in capital (APIC) resulting from a tax deficiency associated with a share-based compensation plan other than an employee stock ownership plan (ESOP). Operating Lease, Liability Operating Lease, Liability Deferred share units, issued and outstanding Share Based Compensation Arrangement By Share Based Payment Award Options Issued And Outstanding In Period Gross Share based compensation arrangement by share based payment award options issued and outstanding in period gross. Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Noncontrolling Interest, Increase from Business Combination Noncontrolling Interest, Increase from Business Combination Accounting Standards Update 2016-02 [Member] Accounting Standards Update 2016-02 [Member] Other Liabilities, Noncurrent Other Liabilities, Noncurrent Auditor [Line Items] Goodwill impairment loss Goodwill, Impairment Loss Unobservable input - book value multiple - weighted average [Abstract] Unobservable input - book value multiple - weighted average Unobservable input - book value multiple - weighted average REGULATORY CAPITAL REQUIREMENTS Regulatory Capital Requirements under Banking Regulations [Text Block] Schedule Of Variable Interest Entities [Table] Variable Interest Entity [Table] Amount at Risk Risk Of Loss The risk of loss on Investment in VIE. Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Lessee, Operating Lease, Liability, Payments, Due Year Three Lessee, Operating Lease, Liability, to be Paid, Year Three Second Lawsuit by AGF Second Lawsuit By A G F [Member] Second lawsuit by AGF. State and local taxes paid - Other State and local taxes paid - Other State and local taxes paid - Other Loss on asset disposition Excess Tax Benefit from Share-Based Compensation, Operating Activities (Deprecated 2022) Amount of cash outflow for realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Total comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Disposal Group Name [Domain] Disposal Group Name [Domain] Income (Loss) Before Income Taxes by Jurisdiction Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Acquired Goodwill - Total Acquired Goodwill - Total Acquired Goodwill - Total Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Private Equity Investments [Member] Private Equity Investments [Member] Private Equity Investments [Member] Income taxes receivable and payable Increase (Decrease) in Accrued Taxes Payable Westwood Hospitality Fund I LLC [Member] Westwood Hospitality Fund I LLC [Member] Westwood Hospitality Fund I LLC [Member] Restatement Adjustment [Member] Revision of Prior Period, Adjustment [Member] Legal Entity [Axis] Legal Entity [Axis] Nonredeemable Noncontrolling Interest Nonredeemable Noncontrolling Interest Assets Assets Cash flows from investing activities: Cash Provided by (Used in) Investing Activity, Continuing Operation [Abstract] 2019 Finite-Lived Intangible Asset, Expected Amortization, Year One Vested (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Schedule Of Significant Accounting Policies [Line Items] Schedule Of Significant Accounting Policies [Line Items] Schedule of significant accounting policies. Geographical [Domain] Geographical [Domain] Income Taxes Income Tax, Policy [Policy Text Block] Receivable Type [Axis] Receivable Type [Axis] Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life Concentration Risk Type Concentration Risk Type [Axis] Private equity Private Equity Funds [Member] Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] 2022 Finite-Lived Intangible Asset, Expected Amortization, Year Four Dividends declared per share Common Stock, Dividends, Per Share, Declared Fair Value Hierarchy Including NAV [Axis] Fair Value Hierarchy Including NAV [Axis] Fair Value Hierarchy Including NAV [Axis] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Capitalized Contract Cost, Net Capitalized Contract Cost, Net Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Schedule Of Available For Sale Securities [Line Items] Debt Securities, Available-for-Sale [Line Items] Business Combination, Recognized Asset Acquired, Asset Business Combination, Recognized Asset Acquired, Asset Level 2 Fair Value, Inputs, Level 2 [Member] Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Equity Method Investments Equity Method Investments Business Combination [Domain] Business Combination [Domain] Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal Income Tax Provision (Benefit) as Set Forth in the Consolidated Statements of Income Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Plan Name [Axis] Plan Name [Axis] Property and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Debt Securities, Trading Debt Securities, Trading Intangibles Deferred Tax Liabilities, Intangible Assets Tax Reform [Axis] Tax Reform [Axis] Tax Reform [Axis] UNITED STATES U.S. UNITED STATES Changes in operating assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Weighted-Average Grant Date Fair Value for Shares Granted and the Total Fair Value of Shares Vested Share Based Compensation Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value And Fair Value Of Shares Vested Table [Text Block] Share based compensation award equity instruments other than options grants in period weighted average grant date fair value and fair value of shares vested. Cash Acquired in Excess of Payments to Acquire Business Cash Acquired in Excess of Payments to Acquire Business Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Property and equipment Deferred Tax Liabilities, Property, Plant and Equipment Adjusted pre-tax income Share Pretax Income Goal Share pretax income goal. Retained Earnings (Accumulated Deficit) Retained Earnings [Member] Adjusted Goodwill - Total Adjusted Goodwill - Total Adjusted Goodwill - Total Summary of Quarterly Results of Operations Quarterly Financial Information [Table Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Share-Based Payment Arrangement [Abstract] Income Statement [Abstract] Income Statement [Abstract] Noncontrolling Interest in Limited Partnerships Noncontrolling Interest in Limited Partnerships Tax Year 2017 [Member] Tax Year 2017 [Member] Product and Service [Domain] Product and Service [Domain] Customer Concentration Risk Customer Concentration Risk [Member] Inputs, Net Asset Value [Member] Inputs, Net Asset Value [Member] Inputs, Net Asset Value [Member] Estimated lease asset and net lease liability for ASU 2016-02 Estimated lease asset and net lease liability for ASU 2016-02 Estimated lease asset and net lease liability for ASU 2016-02 Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Business Combination, Consideration Transferred, Equity Interest, Type [Axis] Business Combination, Consideration Transferred, Equity Interest, Type [Axis] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] City Area Code City Area Code Gain (Loss) from Litigation Settlement Gain (Loss) from Litigation Settlement Total deferred tax liabilities Deferred Tax Liabilities, Net General and administrative General and Administrative Expense UCITS Fund Undertaking For Collective Investment In Transferable Securities [Member] Undertaking for collective investment in transferable securities. Contract with Customer, Duration [Axis] Contract with Customer, Duration [Axis] Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] Related Party Transactions [Abstract] Related Party Transactions [Abstract] Assets Under Management Assets under Management, Carrying Amount Accounts Receivable, Related Parties Accounts Receivable, Related Parties (Deprecated 2023) Tax Adjustments, Settlements, and Unusual Provisions Tax Adjustments, Settlements, and Unusual Provisions Other Liabilities Other Liabilities Goodwill Segment goodwill Goodwill Lease, Cost Lease, Cost [Table Text Block] Gain (Loss) on Investments Gain (Loss) on Investments Deferred Federal Income Tax Expense (Benefit) Deferred Federal Income Tax Expense (Benefit) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 Unrecognized Tax Benefits [Roll Forward] Unrecognized Tax Benefits [Roll Forward] Auditor Name Auditor Name DESCRIPTION OF THE BUSINESS Nature of Operations [Text Block] Concentration Risk [Table] Concentration Risk [Table] seed money investment seed money investment seed money investment Treasury Stock, Acquired, Employee Stock Plan Treasury Stock, Acquired, Employee Stock Plan Treasury Stock, Acquired, Employee Stock Plan Goodwill, Impaired, Accumulated Impairment Loss Goodwill, Impaired, Accumulated Impairment Loss Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax U.S. Government securities US Treasury and Government [Member] Related Party Related and Nonrelated Parties [Domain] Difference between the Federal corporate tax rate and the effective tax rate Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract] Effective Income Tax Rate Reconciliation, Tax Settlement, State and Local, Amount Effective Income Tax Rate Reconciliation, Tax Settlement, State and Local, Amount Proceeds from Income Tax Refunds Proceeds from Income Tax Refunds Vesting Vesting [Axis] Fair Value of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Computation of Basic and Diluted Shares Earnings Per Share Reconciliation [Abstract] Accounting Standards Update 2016-09 [Member] Accounting Standards Update 2016-09 [Member] (Deprecated 2022) Accounting Standards Update 2016-09 Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. Other Payments to Acquire Businesses Other Payments to Acquire Businesses Other current assets Other Assets, Current Additional paid-in capital Additional Paid in Capital, Common Stock Entity [Domain] Entity [Domain] Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Purchase Obligation, to be Paid, Year One Purchase Obligation, to be Paid, Year One Non Cash Accrued PP&E Non Cash Accrued PP&E Non Cash Accrued PP&E Document Fiscal Year Focus Document Fiscal Year Focus Operating Lease, Right-of-Use Asset Operating Lease, Right-of-Use Asset Related Party Transaction, Expenses from Transactions with Related Party Related Party Transaction, Expenses from Transactions with Related Party (Deprecated 2023) Trust Performance-based Trust Performance-based [Member] Trust Performance-based Effective Income Tax Rate Reconciliation, Percent Effective income tax rate Effective Income Tax Rate Reconciliation, Percent Operating Lease, Cost Operating Lease, Cost Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Cash flows from operating activities: Cash Provided by (Used in) Operating Activity, Continuing Operation [Abstract] Plan Name [Domain] Plan Name [Domain] Increase (Decrease) in Accounts Receivable, Related Parties Increase (Decrease) in Accounts Receivable, Related Parties Remaining unrecognized compensation cost recognized over a remaining weighted average period Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Fiduciary and Trust [Member] Fiduciary and Trust [Member] Valuation allowance Deferred Tax Assets, Valuation Allowance Goodwill and Other Intangible Assets Goodwill and Intangible Assets, Policy [Policy Text Block] Purchase Obligation Purchase Obligation SEGMENT REPORTING Segment Reporting Disclosure [Text Block] Banking Regulation, Tangible Capital, Minimum Banking Regulation, Tangible Capital, Minimum Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Current Federal Tax Expense (Benefit) Current Federal Tax Expense (Benefit) New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Finite Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Share Repurchase Program, Authorized, Number of Shares Share Repurchase Program, Authorized, Number of Shares Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Fair Value, Recurring and Nonrecurring [Table] Amortization of intangible assets Amortization expense Amortization of Intangible Assets Proceeds from Sale and Collection of Receivables Proceeds from Sale and Collection of Receivables Deferred income taxes Deferred Income Tax Assets, Net Treasury Stock, Value, Acquired, Cost Method Stock Repurchased During Period, Value Components of Accumulated Other Comprehensive Loss Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Purchases of investments Payments to Acquire Productive Assets Accrued dividends Dividends Declared Dividends Declared Revenue From External Sources Revenue From External Sources Revenue From External Sources Noncurrent operating lease liabilities Deferred Rent Credit, Noncurrent Costs and Expenses, Related Party Costs and Expenses, Related Party Adjustments for Change in Accounting Principle [Axis] Change in Accounting Principle, Type [Axis] Gross Unrealized Losses Trading Securities, Unrealized Holding Loss Trading Securities, Unrealized Holding Loss (Deprecated 2023) Canadian rate differential Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount Reasonably possible maximum decrease in uncertain tax position Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit Business Combination, Acquiree's Earnings (Loss) since Acquisition Date, Actual Business Combination, Acquiree's Earnings (Loss) since Acquisition Date, Actual Investment Balances Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block] Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Segments [Axis] Segments [Axis] Adjustments for Change in Accounting Principle [Domain] Change in Accounting Principle, Type [Domain] Loss contingency, receivable Loss Contingency, Receivable, Current Local Phone Number Local Phone Number Share price Share Price Europe [Member] Europe [Member] Gain on asset disposition Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item Investments in securities: Investments, Fair Value Disclosure [Abstract] ASSETS Assets [Abstract] Dilutive potential shares from unvested restricted shares (in shares) Incremental Common Shares Attributable To Nonvested Restricted Shares Incremental common shares attributable to nonvested restricted shares. Revenue retention earn-out Revenue retention earn-out Revenue retention earn-out Rental Income, Nonoperating Rental Income, Nonoperating Forfeited (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value FAIR VALUE OF FINANCIAL INSTRUMENTS Fair Value Disclosures [Text Block] Stockholders’ Equity: Equity, Attributable to Parent [Abstract] Punitive Damage Punitive Damage [Member] Punitive damage. Percentage of deferred share units vesting Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage Purchases of treasury stock Treasury Stock, Value, Acquired, Cost Method Business Combination, Contingent Consideration, Change in Range of Outcomes, Liability, Maximum, Increase (Decrease) Business Combination, Contingent Consideration, Change in Range of Outcomes, Liability, Maximum, Increase (Decrease) Operating Lease, Liability, Noncurrent Operating Lease, Liability, Noncurrent Entity Voluntary Filers Entity Voluntary Filers Unobservable input - growth discount rate - weighted average Unobservable input - growth discount rate - weighted average Unobservable input - growth discount rate - weighted average Other Long-term Investments Other Long-Term Investments Net deferred tax assets and liabilities are reflected on our balance sheet Deferred Tax Assets, Net, Classification [Abstract] (Deprecated 2022) Summary of intangible assets Intangible Assets, Net (Excluding Goodwill) [Abstract] Adjustments for New Accounting Pronouncement [Member] Adjustments for New Accounting Pronouncement [Member] (Deprecated 2021) Sources of change to generally accepted accounting principles (GAAP) in the United States. The FASB released the FASB Accounting Standards Codification as the authoritative source of literature effective for interim and annual periods ending after September 15, 2009. As part of the Codification process, the FASB issues "Accounting Standards Updates" to amend the Codification but otherwise the Accounting Standards Updates are not authoritative in their own right. All previous accounting standards (such as FASB Statements of Financial Accounting Standards, FASB Interpretations, FASB Staff Positions, Emerging Issues Task Force Consensuses, other pronouncements of the FASB or other designated bodies, or other forms of GAAP are considered accounting pronouncements) were superseded upon the adoption of the Codification. For an interim period, references to the superseded standards are included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Recorded Unconditional Purchase Obligation, Due in Rolling Year Three Recorded Unconditional Purchase Obligation, Due in Rolling Year Three Retained Earnings, Appropriated [Member] Retained Earnings, Appropriated [Member] Accounts Receivable, after Allowance for Credit Loss Accounts Receivable, after Allowance for Credit Loss Entity Registrant Name Entity Registrant Name InvestCloud private investment InvestCloud private investment InvestCloud private investment Lessee, Operating Lease, Discount Rate Lessee, Operating Lease, Discount Rate Number of largest clients Number Of Major Customers UCITS Fund [Member] UCITS Fund [Member] UCITS Fund [Member] Restatement [Domain] Revision of Prior Period [Domain] Related Party Related and Nonrelated Parties [Axis] Granted (in dollars per share) Weighted-average grant date fair value (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, before Tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, before Tax Net cash provided by (used in) operating activities Cash Provided by (Used in) Operating Activity, Continuing Operation Summary of Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Private Equity Investment Purchase Private Equity Investment Purchase Private Equity Investment Purchase Purchases of common stock with respect to awards granted Share Based Compensation Arrangement By Share Based Payment Award Available For Grant Share based awards available for future grants. Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Accounts Receivable Accounts Receivable [Member] Deferred Foreign Income Tax Expense (Benefit) Deferred Foreign Income Tax Expense (Benefit) Members' Equity Members' Equity Number of reporting units Number of Reporting Units Net cash (used in) provided by investing activities Cash Provided by (Used in) Investing Activity, Continuing Operation Salient MLP Total Return Fund, L.P. [Domain] Salient MLP Total Return Fund, L.P. [Domain] Salient MLP Total Return Fund, L.P. [Domain] Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount Beginning balance Ending balance Goodwill Trust Segment Goodwill Trust Segment Goodwill Previously Reported [Member] Previously Reported [Member] 2021 Operating Leases, Future Minimum Payments, Due in Three Years Contract with Customer, Basis of Pricing [Domain] Contract with Customer, Basis of Pricing [Domain] Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Deferred Tax Assets, Property, Plant and Equipment Deferred Tax Assets, Property, Plant and Equipment Right-of-use assets obtained in exchange for operating lease liabilities Business Combination, Consideration Transferred, Equity Interest Property, Plant and Equipment, Other, Accumulated Depreciation Property, Plant and Equipment, Other, Accumulated Depreciation Equity funds Equity Funds [Member] Wealth Management Private Wealth [Member] Private wealth. Non-vested, January 1, 2015 (in dollars per share) Non-vested, December 31, 2015 (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest Asset Acquisition [Line Items] Asset Acquisition [Line Items] Percentage of compensation Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay Alternative Investment Alternative Investment Decrease in income tax provision Significant Change in Income Tax Provision is Reasonably Possible, Amount of Unrecorded Benefit Significant Change in Income Tax Provision is Reasonably Possible, Amount of Unrecorded Benefit Stock-based compensation expense APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Treasury stock, at cost – 2,___,___ and 2,715,977, respectively Treasury Stock, Value Westwood Funds Westwood Funds [Member] Westwood funds. Litigation Case Litigation Case [Axis] Trust [Member] Trust [Member] Trust. Auditor Firm ID Auditor Firm ID Segments [Domain] Segments [Domain] Litigation claim for damages Loss Contingency, Damages Sought, Value Statement of Income Location, Balance [Axis] Statement of Income Location, Balance [Axis] Canada Income (Loss) from Continuing Operations before Income Taxes, Foreign Assets, Noncurrent [Abstract] Assets, Noncurrent Unobservable input - growth volatility - minimum Unobservable input - growth volatility - minimum Unobservable input - growth volatility - minimum Restricted Shares Subject to Service and Performance Conditions Restricted Shares Subject to Service and Performance Conditions Restricted Shares Subject To Service And Performance Conditions [Member] Restricted shares subject to service and performance conditions. Total revenues Total revenues Total revenues INVESTMENTS Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Finite-Lived Intangible Assets Disposed [Table] Finite-Lived Intangible Assets Disposed [Table] Finite-Lived Intangible Assets Disposed [Table] Earnings Per Share, Policy [Policy Text Block] Earnings Per Share, Policy [Policy Text Block] Property and equipment, accumulated depreciation Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Weighted Average Amortization Period (years) Finite-Lived Intangible Asset, Weighted-Average Period before Renewal or Extension Revenue Recognition, Policy [Policy Text Block] Revenue [Policy Text Block] Fund purchases of common stock Fund Purchases Of Common Stock Fund purchases of common stock. Trust Fee [Member] Trust Fee [Member] Trust Fee [Member] Business Combination, Recognized Liability Assumed, Liability Business Combination, Recognized Liability Assumed, Liability Deferred Tax Assets and Deferred Tax Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Common stock, $0.01 par value, authorized 25,000,000 shares, issued 11,___,___ and 11,856,737, respectively and outstanding 9,___,___ and 9,140,760, respectively Common Stock, Value, Issued Investments, at fair value Short-Term Investments Realized losses Trading Securities, Realized Loss (Deprecated 2023) Distributed Earnings Distributed Earnings Title and Position Title and Position [Axis] Ridgeline, Inc. - private investment Ridgeline, Inc. - private investment Ridgeline, Inc. - private investment Supplemental Deferred Purchase Price Supplemental Deferred Purchase Price State and local taxes paid - Pennsylvania State and local taxes paid - Pennsylvania State and local taxes paid - Pennsylvania Commitments and contingencies Commitments and Contingencies Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived Significant Accounting Policy [Table] Significant Accounting Policy [Table] Significant accounting policy. Fair Value Measured at Net Asset Value Per Share Fair Value Measured at Net Asset Value Per Share [Member] Business Combination [Axis] Business Combination [Axis] Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest New Accounting Pronouncements or Change in Accounting Principle [Table] Accounting Standards Update and Change in Accounting Principle [Table] Revenues by Geographic Location Revenue from External Customers by Geographic Areas [Table Text Block] Unobservable input - growth volatility - maximum Unobservable input - growth volatility - maximum Unobservable input - growth volatility - maximum Noncontrolling Interest Noncontrolling Interest [Member] Equity Method Investments Equity Method Investments [Policy Text Block] Equity Method Investment, Ownership Percentage Equity Method Investment, Ownership Percentage Concentration Risk [Line Items] Concentration Risk [Line Items] Net deferred tax assets Deferred Tax Assets, Net Property and Equipment, Net by Geographic Area Long-Lived Assets by Geographic Areas [Table Text Block] BALANCE SHEET COMPONENTS Supplemental Balance Sheet Disclosures [Text Block] Effective Income Tax Rate Reconciliation, Tax Settlement, Percent Effective Income Tax Rate Reconciliation, Tax Settlement, Percent Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Gain (Loss) on Sale of Assets and Asset Impairment Charges Gain (Loss) on Sale of Assets and Asset Impairment Charges Scenario [Axis] Scenario [Axis] Schedule of Unrecognized Tax Benefits Roll Forward Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] Tax rate excluding ASU 2016-09 adoption Tax rate excluding ASU 2016-09 adoption Tax rate excluding ASU 2016-09 adoption Rental expense for facilities and equipment leases Operating Leases, Rent Expense Income tax expense from gains (losses) Income Tax Benefit Expense On Securities Transactions Income tax benefit expense on securities transactions. Service period of mutual fund share incentive award Share-Based Compensation Arrangement by Share-Based Payment Award, Award Requisite Service Period Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation [Domain] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Expenditures for long-lived assets Payments to Acquire Property, Plant, and Equipment Westwood Management Westwood Management [Member] Westwood management. SCLP net capital SCLP net capital SCLP net capital Disposal Group Classification [Axis] Disposal Group Classification [Axis] Finite-Lived Intangible Assets Disposed [Table Text Block] Finite-Lived Intangible Assets Disposed [Table Text Block] [Table Text Block] for Finite-Lived Intangible Assets Disposed [Table] Westwood funds expense Westwood funds expense Westwood funds expense Asset Acquisition, Consideration Transferred, Contingent Consideration Asset Acquisition, Consideration Transferred, Contingent Consideration Tax Reform [Domain] Tax Reform [Domain] [Domain] for Tax Reform [Axis] Schedule Of Finite Lived Intangible Assets [Table] Intangible Asset, Finite-Lived [Table] Westwood International Advisors Inc Westwood International Advisors Inc [Member] Westwood International Advisors Inc. Geographical [Axis] Geographical [Axis] QUARTERLY FINANCIAL DATA (Unaudited) Quarterly Financial Information [Text Block] Restricted Stock Subject Only to a Service Condition Restricted Stock Subject Only To Service Condition [Member] Restricted stock subject only to service condition. Business Combination, Pro Forma Information, Pro Forma Revenue Business Combination, Pro Forma Information, Pro Forma Revenue Foreign Currency Transaction Gain (Loss), before Tax Gain (Loss), Foreign Currency Transaction, before Tax Common Trust Funds Common Trust Funds [Member] Common trust funds. Concentration Risk Benchmark Concentration Risk Benchmark [Domain] Title of 12(b) Security Title of 12(b) Security Treasury Stock, Value, Acquired, Cost Method, Employee Stock Plan Treasury Stock, Value, Acquired, Cost Method, Employee Stock Plan Treasury Stock, Value, Acquired, Cost Method, Employee Stock Plan Percentage of Pretax income Goal Earned Percentage of Pretax income Goal Earned Percentage of Pretax income Goal Earned Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Service, Other [Member] Service, Other [Member] Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount Capitalized Contract Cost, Amortization Capitalized Contract Cost, Amortization Estimated useful lives of the assets Property, Plant, and Equipment, Useful Life, Term, Description [Extensible Enumeration] Recorded Unconditional Purchase Obligation, Due in Rolling Year Five Recorded Unconditional Purchase Obligation, Due in Rolling Year Five Earnings per share: Earnings Per Share [Abstract] Lessee, Operating Lease, Liability, Payments, Due Year Five Lessee, Operating Lease, Liability, to be Paid, Year Five Noncompete Agreements [Member] Noncompete Agreements [Member] Contract with Customer, Sales Channel [Domain] Contract with Customer, Sales Channel [Domain] Schedule of Economic Earnings Schedule of Economic Earnings [Table Text Block] Schedule of Economic Earnings [Table Text Block] Goodwill, Written off Related to Sale of Business Unit Goodwill, Written off Related to Sale of Business Unit Goodwill, Written off Related to Sale of Business Unit Quarterly Financial Information Disclosure [Abstract] Quarterly Financial Information Disclosure [Abstract] Income Tax Paid, Federal, before Refund Received Income Tax Paid, Federal, before Refund Received us-gaap_EquitySecuritiesMember us-gaap_EquitySecuritiesMember [Member] Exchange-traded bond funds Payment for Contingent Consideration Liability, Operating Activities Payment for Contingent Consideration Liability, Operating Activities Fees earned from related party Revenue from Related Parties (Deprecated 2023) Purchases of treasury stock, shares Purchase of treasury stock, shares Treasury Stock, Shares, Acquired Adjusted goodwill - Advisory segment Adjusted goodwill - Advisory segment Adjusted goodwill - Advisory segment State and local income taxes, net of federal income taxes(1) Effective Income Tax Rate Reconciliation, Tax Contingency, Domestic, Amount Canadian Plan Canadian Plan [Member] Canadian Plan. Other Revenue Gain (Loss) on Securities [Table Text Block] Business Combination Consideration Transferred Gross- Broadmark Business Combination Consideration Transferred Gross- Broadmark Business Combination Consideration Transferred Gross- Broadmark Trade name Trade name Trade name Banking and Thrift [Abstract] Banking and Thrift [Abstract] (Deprecated 2020) Westwood funds Mutual Fund Administration And Distribution Expenses related to the administration, distribution and marketing of mutual funds. Deferred State and Local Income Tax Expense (Benefit) Deferred State and Local Income Tax Expense (Benefit) Net income Net income Net Income (Loss) Attributable to Parent Subsequent Event [Table] Subsequent Event [Table] Construction in progress Construction in Progress [Member] Operating Lease, Lease Income, Lease Payments Operating Lease, Lease Income, Lease Payments Difference between the Federal Corporate Tax Rate and the Effective Tax Rate Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Restricted shares granted to employees vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Axis] Other, net, effective tax rate Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Purchases of treasury stock Amount of shares purchased in the open market Payments for Repurchase of Common Stock Taxes Payable Taxes Payable Mutual fund incentive award expense Mutual fund incentive award expense Mutual fund incentive award expense Excess tax benefits from stock-based compensation Excess Tax Benefit from Share-Based Compensation, Financing Activities (Deprecated 2022) Amount of cash inflow from realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes. Customer [Axis] Customer [Axis] Cash flows from financing activities: Cash Provided by (Used in) Financing Activity, Continuing Operation [Abstract] Customer Relationships [Member] Customer Relationships [Member] Operating Income (Loss) Operating Income (Loss) Trust performance-based fees [Member] Trust performance-based fees [Member] Trust performance-based fees Retained earnings (accumulated deficit) Retained Earnings (Accumulated Deficit) Accrued liability Deferred Compensation Share-Based Arrangements, Liability, Current and Noncurrent Payments for Other Fees Payments for Other Fees Subsequent Event Type Subsequent Event Type [Domain] Dividend income Investment Income, Dividend Deferred Tax Liabilities, Other Deferred Tax Liabilities, Other Adoption of ASU 2016-09 [Member] Adoption of ASU 2016-09 [Member] Adoption of ASU 2016-09 [Member] Total investments under measurement alternative Total investments under measurement alternative Total investments under measurement alternative Statement [Table] Statement [Table] Deferred Income Tax Expense (Benefit), Total Deferred Income Tax Expense (Benefit) Adjustments to reconcile net income to net cash provided by (used in) operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent Sales Revenue, Net Revenue Benchmark [Member] Treasury stock, shares Treasury Stock, Shares (Deprecated 2023) WEBs - call option WEBs - call option WEBs - call option Net (purchases) sales of investments – investments at fair value Increase (Decrease) in Debt Securities, Trading, and Equity Securities, FV-NI Advisory [Member] Advisory [Member] Advisory. Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Amendment Flag Amendment Flag Total income tax benefit recognized related to stock-based compensation Share-Based Payment Arrangement, Expense, Tax Benefit Investments under fair value measurement alternative Investments under fair value measurement alternative Investments under fair value measurement alternative Total number of shares that may be issued under the stock based compensation Plan (including predecessor plans to the Plan) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized Increase (Decrease) in Contract with Customer, Asset Increase (Decrease) in Contract with Customer, Asset Business Combinations - Broadmark net income included in earnings Business Combinations - Broadmark net income included in earnings Business Combinations - Broadmark net income included in earnings Cost, Depreciation Cost, Depreciation Receivable [Domain] Receivable [Domain] Share-based Compensation Award, Tranche Three Share-Based Payment Arrangement, Tranche Three [Member] Operating Lease, Weighted Average Discount Rate, Percent Operating Lease, Weighted Average Discount Rate, Percent Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Business Combination, Acquiree's Revenue since Acquisition Date, Actual Business Combination, Acquiree's Revenue since Acquisition Date, Actual Basic (in shares) Weighted average shares outstanding – basic (in shares) Weighted Average Number of Shares Outstanding, Basic Tax Credits used to pay Federal cash taxes Tax Credits used to pay Federal cash taxes Tax Credits used to pay Federal cash taxes Unrecognized Tax Benefits that Would Impact Effective Tax Rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate Income (Loss) from Continuing Operations before Interest Expense, Interest Income, Income Taxes, Noncontrolling Interests, Net Income (Loss) from Continuing Operations before Interest Expense, Interest Income, Income Taxes, Noncontrolling Interests, Net Payment for Contingent Consideration Liability, Investing Activities Payment for Contingent Consideration Liability, Investing Activities Computation of Basic and Diluted Shares Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Director Director [Member] Subsequent Events [Abstract] Subsequent Events [Abstract] Segment Reporting [Abstract] Segment Reporting [Abstract] Estimated amortization expense for intangible assets for the next five years Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] Long Term Investment, at Cost, in a private investment fund Long Term Investment, at Cost, in a private investment fund Long Term Investment, at Cost, in a private investment fund Penalties and interest Income Tax Examination, Penalties and Interest Expense Defined Benefit Plan, Plan Assets, Category [Axis] Defined Benefit Plan, Plan Assets, Category [Axis] Scenario, Unspecified [Domain] Scenario [Domain] Expenses: Costs and Expenses [Abstract] Dividends, Cash Dividends, Cash Estimated Litigation Liability, Current Estimated Litigation Liability, Current Total reporting segment Total reporting segment [Member] Total reporting segment Debt Securities, Trading, Unrealized Loss Debt Securities, Trading, Unrealized Loss Variable Interest Entities Consolidated Entities [Axis] Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Common stock, par value Common Stock, Par or Stated Value Per Share Compensation and benefits payable Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Benefits Investment Performance [Member] Investment Performance [Member] Other reporting segment Other reporting segment [Member] Other reporting segment Revenue Disaggregation by Geographic Location [Table Text Block] Revenue Disaggregation by Geographic Location [Table Text Block] [Table Text Block] for Revenue Disaggregation by Geographic Location [Table] First Lawsuit By A G F First Lawsuit By A G F [Member] First lawsuit by AGF. Use of Estimates Use of Estimates, Policy [Policy Text Block] Cash dividends Payments of Dividends Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Tax Litigation Settlement, Amount Awarded to Other Party Litigation Settlement, Amount Awarded to Other Party Values of Assets Within Fair Value Hierarchy Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] SUBSEQUENT EVENTS Subsequent Events [Text Block] Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Related Party Transaction, Purchases from Related Party Related Party Transaction, Purchases from Related Party Equity Securities Equity Securities [Member] Payment for Repurchases of Stock for Benefit Plan Payment for Repurchases of Stock for Benefit Plan Payment for Repurchases of Stock for Benefit Plan Global Intangible Low Taxed Income, Net Deductions Global Intangible Low Taxed Income, Net Deductions Global Intangible Low Taxed Income, Net Deductions Total liabilities Liabilities Antidilutive Securities, Name Antidilutive Securities, Name [Domain] Investment Advisory Services [Member] Investment Advisory Services [Member] Investment Advisory Services [Member] Net interest and dividend revenue Investment Income, Net Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Deferred Tax Assets, Tax Deferred Expense, Other Deferred Tax Assets, Tax Deferred Expense, Other Stock Issued During Period, Value, New Issues Stock Issued During Period, Value, New Issues Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Business Combination, Intangible Asset, Acquired, Finite-Lived and Indefinite-Lived [Table Text Block] Consolidation Items [Axis] Consolidation Items [Axis] Balance at December 31, 2021 Balance at December 31, 2021 Balance at December 31, 2021 Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Trust Trust for Benefit of Employees [Member]