Leases [Abstract] Lessee, Operating Leases [Text Block] Lessee, Operating Leases [Text Block] Earnings Per Share [Abstract] Earnings Per Share, Policy [Policy Text Block] Earnings Per Share, Policy [Policy Text Block] Employee Benefit and Share-based Payment Arrangement, Noncash Expense [Abstract] LONG-TERM INCENTIVE COMPENSATION Compensation and Employee Benefit Plans [Text Block] Segment Reporting [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Award Type Award Type [Axis] Equity Award Award Type [Domain] Restricted Stock Restricted Stock [Member] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Operating Segments Operating Segments [Member] Westwood Holdings Corporate, Non-Segment [Member] Eliminations Intersegment Eliminations [Member] Segments [Axis] Segments [Axis] Segment [Domain] Segments [Domain] Advisory Advisory [Member] Advisory. Trust Trust [Member] Trust. Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Revenue From External Sources Revenue From External Sources Revenue From External Sources ReconciliationFromNetIncomeToNonGaapMeasure [Table Text Block] ReconciliationFromNetIncomeToNonGaapMeasure [Table Text Block] ReconciliationFromNetIncomeToNonGaapMeasure [Table Text Block] Net intersegment revenues Net Intersegment Revenues Net intersegment revenues. Net interest and dividend revenue Investment Income, Net Other revenue Other revenue Other revenue Total revenues Revenues Economic Earnings 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. Share-based Payment Arrangement, Expense Share-based Payment Arrangement, Expense Intangible amortization Amortization of Intangible Assets Deferred taxes on goodwill Deferred Other Tax Expense (Benefit) Net income Net Income (Loss) Attributable to Parent Segment assets Assets Goodwill Goodwill Organization, Consolidation and Presentation of Financial Statements [Abstract] Components of Accumulated Other Comprehensive Loss Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Equity [Abstract] Stock Repurchase Program, Authorized Amount Stock Repurchase Program, Authorized Amount Additional Share Repurchase Additional Shares available for Repurchase Additional Shares available for Repurchase Stock Repurchase Program, Remaining Authorized Repurchase Amount Stock Repurchase Program, Remaining Authorized Repurchase Amount Stock Repurchased During Period, Shares Stock Repurchased During Period, Shares Treasury Stock Acquired, Average Cost Per Share Treasury Stock Acquired, Average Cost Per Share Stock Repurchased During Period, Value Stock Repurchased During Period, Value Statement of Financial Position [Abstract] Property and equipment, accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Common stock, par value (dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares issued Common Stock, Shares, Issued Common stock, shares outstanding Common Stock, Shares, Outstanding Treasury stock, shares Treasury Stock, Shares Long-term Investments Carried at Fair Value Long-term Investments Carried at Fair Value Long-term Investments Carried at Fair Value Fair Value Disclosures [Abstract] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Measurement Frequency [Axis] Measurement Frequency [Axis] Measurement Frequency [Domain] Measurement Frequency [Domain] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] 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] Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block] Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Disposal Groups, Including Discontinued Operations [Table Text Block] Disposal Groups, Including Discontinued Operations [Table Text Block] Number of operating segments Number of Reportable Segments Accounting Policies [Abstract] Significant Accounting Policies [Text Block] Significant Accounting Policies [Text Block] Income Statement [Abstract] Statement [Table] Statement [Table] Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Asset Management [Member] Asset Management [Member] Investment Performance [Member] Investment Performance [Member] Fiduciary and Trust [Member] Fiduciary and Trust [Member] Scenario [Axis] Scenario [Axis] Scenario [Domain] Scenario [Domain] Statement [Line Items] Statement [Line Items] Revenue from Contract with Customer, Including Assessed Tax Revenue from Contract with Customer, Including Assessed Tax REVENUES: Revenues [Abstract] Other Revenue, Net Other Revenue, Net Other Revenue, Net EXPENSES: Costs and Expenses [Abstract] Employee compensation and benefits Labor and Related Expense Sales and marketing Selling and Marketing Expense Westwood mutual funds Mutual Fund Administration And Distribution Expenses related to the administration, distribution and marketing of mutual funds. Information technology Communications and Information Technology Professional services Professional Fees General and administrative General and Administrative Expense Foreign Currency Transaction Gain (Loss), before Tax Foreign Currency Transaction Gain (Loss), before Tax Total expenses Costs and Expenses Operating Income (Loss) Operating Income (Loss) Gain on sale of operations Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal Other Income Other Income Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Provision for income taxes Income Tax Expense (Benefit) Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Total comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Earnings per share: Basic (dollars per share) Earnings Per Share, Basic Diluted (dollars per share) Earnings Per Share, Diluted Weighted average shares outstanding: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Basic (shares) Weighted Average Number of Shares Outstanding, Basic Diluted (shares) Weighted Average Number of Shares Outstanding, Diluted Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Restricted Shares Subject Only to a Service Condition Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] 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] Non-vested, beginning balance, shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Vested (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Forfeited (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Non-vested, ending balance, shares Non-vested, beginning balance, (dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted (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 Vested (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 Forfeited (dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Non-vested, ending balance, (dollars per share) Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities Antidilutive Securities [Axis] Antidilutive Securities, Name Antidilutive Securities, Name [Domain] Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Anti-dilutive restricted shares Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Accounting Changes and Error Corrections [Abstract] New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Adjustments for Change in Accounting Principle [Axis] Adjustments for Change in Accounting Principle [Axis] Adjustments for Change in Accounting Principle [Domain] Adjustments for Change in Accounting Principle [Domain] Restatement [Axis] Restatement [Axis] Restatement [Domain] Restatement [Domain] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] Related Party Transactions [Abstract] Schedule Of Related Party Transactions By Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Related Party Related Party [Axis] Related Party Related Party [Domain] Trust Trust for Benefit of Employees [Member] Variable Interest Entities Variable Interest Entities [Axis] Variable Interest Entity, Classification Variable Interest Entity, Classification [Domain] UCITS Fund Undertaking For Collective Investment In Transferable Securities [Member] Undertaking for collective investment in transferable securities. Private Equity Investments [Member] Private Equity Investments [Member] Private Equity Investments [Member] Private Equity Investment Bank [Member] [Member] Private Equity Investment Bank [Member] [Member] Private Equity Investment Bank [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Document Period End Date Document Period End Date Due from related party Due from Related Parties Fees earned from related party Revenue from Related Parties Fees unpaid from related party Accounts Receivable, Related Parties, Current Related Party Transaction, Purchases from Related Party Related Party Transaction, Purchases from Related Party Goodwill and Intangible Assets Disclosure [Abstract] Goodwill, Impairment Loss Goodwill, Impairment Loss Impairment of Intangible Assets (Excluding Goodwill) Impairment of Intangible Assets (Excluding Goodwill) Statement of Cash Flows [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Net income Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation Depreciation Amortization of intangible assets Unrealized (gains) losses on trading investments Trading Securities, Change in Unrealized Holding Gain (Loss) Stock based compensation expense Share-based Payment Arrangement, Noncash Expense Deferred income taxes Deferred Income Tax Expense (Benefit) Non-cash lease expense Non-cash lease expense Non-cash lease expense Gain on sale of operations Gain on sale of operations Gain on sale of operations Change in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Net sales (purchases) of investments - trading securities Increase (Decrease) in Debt Securities, Trading, and Equity Securities, FV-NI Accounts receivable Increase (Decrease) in Accounts Receivable Other current assets Increase (Decrease) in Other Current Assets Accounts payable and accrued liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Compensation and benefits payable Increase (Decrease) in Employee Related Liabilities Income taxes payable Increase (Decrease) in Accrued Taxes Payable Other liabilities Increase (Decrease) in Other Operating Liabilities Net Cash Provided by (Used in) Operating Activities Net Cash Provided by (Used in) Operating Activities CASH FLOWS FROM INVESTING ACTIVITIES: Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Purchase of property and equipment Payments to Acquire Property, Plant, and Equipment Proceeds from sale of operations Proceeds from Divestiture of Businesses Payments to Acquire Intangible Assets Payments to Acquire Intangible Assets Payments to Acquire Investments Payments to Acquire Investments Net Cash Provided by (Used in) Investing Activities Net Cash Provided by (Used in) Investing Activities CASH FLOWS FROM FINANCING ACTIVITIES: Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Purchases of treasury stock Payments for Repurchase of Common Stock Payment for Repurchases of Stock for Benefit Plan Payment for Repurchases of Stock for Benefit Plan Payment for Repurchases of Stock for Benefit Plan Restricted stock returned for payment of taxes Payment, Tax Withholding, Share-based Payment Arrangement Cash dividends paid Payments of Dividends Net Cash Provided by (Used in) Financing Activities Net Cash Provided by (Used in) Financing Activities Effect of currency rate changes on cash Effect of Exchange Rate on Cash and Cash Equivalents Net Change in Cash and Cash Equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents, beginning of period Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents, end of period Supplemental cash flow information: Supplemental Cash Flow Elements [Abstract] Cash paid during the period for income taxes Income Taxes Paid, Net DividendsAccrued DividendsAccrued DividendsAccrued Computation of Basic and Diluted Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer, Excluding Assessed Tax Revenue from Contract with Customer [Text Block] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Investment Advisory Services [Member] Investment Advisory Services [Member] Investment Advisory Services [Member] Mutual Fund Advisory [Member] Mutual Fund Advisory [Member] [Member] Mutual Fund Advisory [Member] [Member] Private Wealth Advisory [Member] Private Wealth Advisory [Member] Private Wealth [Member] Performance-based fees [Member] performance fee [Member] performance fee [Member] Trust Fees [Member] Trust Fee [Member] Trust Fee [Member] Other Revenue Misc Services [Member] Other Revenue Misc Services [Member] Other Revenue Misc Services [Member] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] Asia [Member] Asia [Member] Australia AUSTRALIA Canada CANADA Europe [Member] Europe [Member] United States [Member] UNITED STATES Contract with Customer, Sales Channel [Axis] Contract with Customer, Sales Channel [Axis] Contract with Customer, Sales Channel [Domain] Contract with Customer, Sales Channel [Domain] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Revenue from Contract with Customer, Excluding Assessed Tax Revenue from Contract with Customer, Excluding Assessed Tax GOODWILL AND OTHER INTANGIBLE ASSETS Goodwill and Intangible Assets Disclosure [Text Block] DESCRIPTION OF THE BUSINESS Nature of Operations [Text Block] Date of incorporation Entity Incorporation, Date of Incorporation Divestiture of Omaha Operations [Table] Cash Proceeds From Divestiture [Table] Cash Proceeds From Divestiture [Table] Disposal Group Classification [Axis] Disposal Group Classification [Axis] Disposal Group Classification [Domain] Disposal Group Classification [Domain] Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] Purchase Price Allocation [Axis] Purchase Price Allocation [Axis] Purchase Price Allocation [Axis] Purchase Price Allocation [Domain] Purchase Price Allocation [Domain] [Domain] for Purchase Price Allocation [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Cash Proceeds From Divestiture [Line Items] Cash Proceeds From Divestiture [Line Items] [Line Items] for Cash Proceeds From Divestiture [Table] Accounts receivable Accounts Receivable, after Allowance for Credit Loss, Current Other current assets Other Assets, Current Intangible assets, net Finite-Lived Intangible Assets, Net Property and equipment, net of accumulated depreciation of $7,144 and $6,462 Property, Plant and Equipment, Net Accounts payable and accrued liabilities Accounts Payable and Accrued Liabilities, Current Other liabilities Other Liabilities, Noncurrent Investments, Debt and Equity Securities [Abstract] Schedule of Investments [Table] Schedule of Investments [Table] Investment Type [Axis] Investment Type [Axis] Investments [Domain] Investments [Domain] Equity funds Equity Funds [Member] Money market funds Money Market Funds [Member] Private Equity Funds [Member] Private Equity Funds [Member] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] U.S. Government and Government agency obligations US Treasury and Government [Member] VIE Variable Interest Entity [Member] Variable interest entity. Schedule of Investments [Line Items] Schedule of Investments [Line Items] Long-term Investments Long-term Investments Cost Trading Securities, Cost Trading Securities, Unrealized Holding Gain Trading Securities, Unrealized Holding Gain Trading Securities, Unrealized Holding Loss Trading Securities, Unrealized Holding Loss Investments, at fair value Short-term Investments Estimated Market Value Debt Securities, Trading, and Equity Securities, FV-NI Debt Securities, Trading, and Equity Securities, FV-NI, Cost Investments carried at fair value, cost Investments carried at fair value, cost Investments carried at fair value, unrealized gain Investments carried at fair value, unrealized gain Investments carried at fair value, unrealized gain Investments carried at fair value, unrealized loss Investments carried at fair value, unrealized loss Investments carried at fair value, unrealized loss Equity Securities, FV-NI, Cost Equity Securities, FV-NI, Cost Equity Securities, FV-NI, Unrealized Gain Equity Securities, FV-NI, Unrealized Gain Equity Securities, FV-NI, Unrealized Loss Equity Securities, FV-NI, Unrealized Loss Investment in private fund Investment in private fund Investment in private fund Treasury Stock [Text Block] Treasury Stock [Text Block] BALANCE SHEET COMPONENTS Stockholders' Equity Note Disclosure [Text Block] Investment Balances Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block] RELATED PARTY TRANSACTIONS Related Party Transactions Disclosure [Text Block] Document And Entity Information [Abstract] Document and entity information. Document Transition Report Document Transition Report Document Quarterly Report Document Quarterly Report Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Tax Identification Number Entity Address, Address Line One Entity Address, Address Line One Title of 12(b) Security Title of 12(b) Security Entity Registrant Name Entity Registrant Name City Area Code City Area Code Local Phone Number Local Phone Number Entity Central Index Key Entity Central Index Key Document Type Document Type Entity File Number Entity File Number Amendment Flag Amendment Flag Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Entity Current Reporting Status Entity Current Reporting Status Entity Interactive Data Current Entity Interactive Data Current Entity Shell Company Entity Shell Company Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Emerging Growth Company Entity Emerging Growth Company Entity Small Business Entity Small Business Trading Symbol Trading Symbol Security Exchange Name Security Exchange Name Entity Address, City or Town Entity Address, City or Town Entity Address, State or Province Entity Address, State or Province Entity Address, Postal Zip Code Entity Address, Postal Zip Code Income Tax Disclosure [Abstract] Discrete tax expense from stock-based compensation Discrete tax expense from stock-based compensation Discrete tax expense from stock-based compensation Effective Income Tax Rate Reconciliation, Percent Effective Income Tax Rate Reconciliation, Percent Components of accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Foreign currency translation adjustment Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Schedule Of Available For Sale Securities [Table] Schedule of Available-for-sale Securities [Table] Schedule Of Available For Sale Securities [Line Items] Debt Securities, Available-for-sale [Line Items] Equity Securities, FV-NI, Unrealized Loss Gross Unrealized Gains Gross Unrealized Losses Investments carried at fair value, unrealized loss Investment in Private Equity Investment in Private Equity Investment in Private Equity Vesting [Axis] Vesting [Axis] Vesting [Domain] Vesting [Domain] Scenario [Axis] Target [Axis] Target [Axis] Target [Domain] Target [Domain] [Domain] for Target [Axis] Statistical Measurement [Axis] Statistical Measurement [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] Canadian Plan Canadian Plan [Member] Canadian Plan. Legal Entity Legal Entity [Axis] Entity Entity [Domain] Westwood International Advisors Inc Westwood International Advisors Inc [Member] Westwood International Advisors Inc. Defined Benefit Plan, Plan Assets, Category [Axis] Defined Benefit Plan, Plan Assets, Category [Axis] Defined Benefit Plan, Plan Assets, Category [Domain] Defined Benefit Plan, Plan Assets, Category [Domain] Mutual Fund [Member] Mutual Fund [Member] 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 Shares remain available for issuance Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Share Based Compensation Arrangement By Share Based Payment Award Available For Grant, Original Share Based Compensation Arrangement By Share Based Payment Award Available For Grant, Original Share Based Compensation Arrangement By Share Based Payment Award Available For Grant, Original Fund purchases of common stock Fund Purchases Of Common Stock Fund purchases of common stock. 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. Share price Share Price Amount of shares purchased in the open market Purchases of treasury stock, shares Treasury Stock, Shares, Acquired Remaining unrecognized compensation cost Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Remaining unrecognized compensation cost recognized over a remaining weighted average period Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Nonvested restricted shares Service period of mutual fund share incentive award Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period Expense related to mutual fund share incentive awards Accrued liability Mutual Fund Incentive Award Liability Mutual fund incentive award liability. Variable Interest Entities [Abstract] Variable interest entities. Schedule Of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] Westwood Funds® Westwood Funds [Member] Westwood funds. Common Trust Funds Common Trust Funds [Member] Common trust funds. Westwood Hospitality Fund I LLC [Member] Westwood Hospitality Fund I LLC [Member] Westwood Hospitality Fund I LLC [Member] Wealth Management Private Wealth [Member] Private wealth. Institutional Institutional [Member] Institutional. Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Variable Interest Entities Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net [Abstract] Assets Under Management Assets under Management, Carrying Amount Amount at Risk Risk Of Loss The risk of loss on Investment in VIE. Income Tax Disclosure [Text Block] Income Tax Disclosure [Text Block] EARNINGS PER SHARE Earnings Per Share [Text Block] Operating Lease, Liability, Current Operating Lease, Liability, Current ASSETS Assets [Abstract] Current Assets: Assets, Current [Abstract] Cash and cash equivalents Income Taxes Receivable, Current Income Taxes Receivable, Current Total current assets Assets, Current Deferred income taxes Deferred Tax Assets, Net, Noncurrent Operating Lease, Right-of-Use Asset Operating Lease, Right-of-Use Asset Total assets LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable and accrued liabilities Dividends payable Dividends Payable, Current Compensation and benefits payable Employee-related Liabilities, Current Income taxes payable Accrued Income Taxes, Current Total current liabilities Liabilities, Current Accrued dividends Dividends Payable Non Current Dividends payable non current. Operating Lease, Liability, Noncurrent Operating Lease, Liability, Noncurrent Total liabilities Liabilities Commitments and contingencies Commitments and Contingencies Stockholders' Equity: Stockholders' Equity Attributable to Parent [Abstract] Common stock, $0.01 par value, authorized 25,000,000 shares, issued 10,314,305 and outstanding 8,906,152 shares at September 30, 2019; issued 10,182,583 and outstanding 8,904,902 shares at December 31, 2018 Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital, Common Stock Treasury stock, at cost - 1,408,152 shares at September 30, 2019; 1,277,681 shares at December 31, 2018 Treasury Stock, Value Retained earnings Retained Earnings (Accumulated Deficit) Total stockholders' equity Stockholders' Equity Attributable to Parent Total liabilities and stockholders' equity Liabilities and Equity FAIR VALUE MEASUREMENTS Fair Value Disclosures [Text Block] Previously Reported [Member] Previously Reported [Member] Restatement Adjustment [Member] Restatement Adjustment [Member] Accounting Standards Update 2016-02 [Member] Accounting Standards Update 2016-02 [Member] Deferred rent Deferred Rent Credit, Noncurrent New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification Subsegments [Axis] Subsegments [Axis] Subsegments [Domain] Subsegments [Domain] Subsegments Consolidation Items [Axis] Subsegments Consolidation Items [Axis] Subsegments Consolidation Items [Domain] Subsegments Consolidation Items [Domain] Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of Segment Reporting Information, by Segment [Table Text Block] Lease Maturity Analysis [Table Text Block] Lease Maturity Analysis [Table Text Block] [Table Text Block] for Lease Maturity Analysis [Table] Lease, Cost [Table Text Block] Lease, Cost [Table Text Block] Lessee, Operating Lease, Disclosure [Table Text Block] Lessee, Operating Lease, Disclosure [Table Text Block] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Corporate offices remaining lease terms Corporate offices remaining lease terms Corporate offices remaining lease terms Sublease Term Sublease Term Sublease Term Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year Lessee, Operating Lease, Liability, Payments, Due Lessee, Operating Lease, Liability, Payments, Due Lessee, Operating Lease, Liability, Payments, Due Year Two Lessee, Operating Lease, Liability, Payments, Due Year Two Lessee, Operating Lease, Liability, Payments, Due Year Three Lessee, Operating Lease, Liability, Payments, Due Year Three Lessee, Operating Lease, Liability, Payments, Due Year Four Lessee, Operating Lease, Liability, Payments, Due Year Four Lessee, Operating Lease, Liability, Payments, Due Year Five Lessee, Operating Lease, Liability, Payments, Due Year Five Operating Lease, Expense Operating Lease, Expense Sublease Income Sublease Income Operating Lease, Payments Operating Lease, Payments Operating Lease, Weighted Average Discount Rate, Percent Operating Lease, Weighted Average Remaining Lease Term Operating Lease, Weighted Average Discount Rate, Percent Operating Lease, Weighted Average Discount Rate, Percent Lessee, Operating Lease, Liability, Payments, Due after Year Five Lessee, Operating Lease, Liability, Payments, Due after Year Five Total Lease Payment Total Lease Payment Total Lease Payment Lessee, Operating Lease, Liability, Undiscounted Excess Amount Lessee, Operating Lease, Liability, Undiscounted Excess Amount Operating Lease, Liability Operating Lease, Liability Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Office equipment lease term Office equipment lease term Office equipment lease term Revenue [Policy Text Block] Revenue [Policy 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. 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. Restricted Stock Subject Only To A Service Condition Policy [Text Block] Restricted Stock Subject Only To A Service Condition Policy [Text Block] Restricted stock subject only to a service condition. Total Expense Recorded for Stock Based Compensation Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table 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] Restricted Stock Subject To Service And Performance Conditions Policy [Text Block] Restricted Stock Subject To Service And Performance Conditions Policy [Text Block] Restricted stock subject to service and performance conditions. Forfeited (shares) Statement of Stockholders' Equity [Abstract] Equity Components Equity Components [Axis] Equity Component Equity Component [Domain] Common Stock, Par Common Stock [Member] Additional Paid-In Capital Additional Paid-in Capital [Member] Treasury Stock Treasury Stock [Member] Accumulated Other Comprehensive Gain (Loss) AOCI Attributable to Parent [Member] Retained Earnings Retained Earnings [Member] Common Stock, Dividends, Per Share, Declared Common Stock, Dividends, Per Share, Declared BALANCE BALANCE, shares Other comprehensive gain Other Comprehensive Income (Loss), Net of Tax Issuance of restricted stock, net of forfeitures Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Issuance of restricted stock, net of forfeitures, shares Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Dividends declared ($2.16 per share) Dividends, Common Stock Stock based compensation expense APIC, Share-based Payment Arrangement, Increase for Cost Recognition Reclassification of compensation liability to be paid in shares Adjustments to Additional Paid in Capital, Other Purchases of treasury stock Treasury Stock, Value, Acquired, Cost Method Purchases of treasury stock, shares Restricted stock returned for payment of taxes Restricted Stock, Value, Shares Issued Net of Tax Withholdings Restricted stock returned for payment of taxes, shares Restricted Stock, Shares Issued Net of Shares for Tax Withholdings BALANCE BALANCE, shares Consolidation, Variable Interest Entity, Policy [Policy Text Block] Consolidation, Variable Interest Entity, Policy [Policy Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] DomesticEmployeeServiceAward [Member] DomesticEmployeeServiceAward [Member] DomesticEmployeeServiceAward [Member] Performance Shares [Member] Performance Shares [Member] DomesticServiceAndPerformanceAward [Member] DomesticServiceAndPerformanceAward [Member] DomesticServiceAndPerformanceAward [Member] CanadianEmployeeServiceAward [Member] CanadianEmployeeServiceAward [Member] CanadianEmployeeServiceAward [Member] Income Statement Location Income Statement Location [Axis] Income Statement Location Income Statement Location [Domain] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] VARIABLE INTEREST ENTITIES Variable Interest Entity Disclosure [Text Block] SEGMENT REPORTING Segment Reporting Disclosure [Text Block] Subsequent Events [Abstract] Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] SUBSEQUENT EVENTS Subsequent Events [Text Block] Dividends declared per share (dollars per share) Dividends payable, date to be paid Dividends Payable, Date to be Paid Dividends payable, date of record Dividends Payable, Date of Record Computation of Basic and Diluted Shares Earnings Per Share Reconciliation [Abstract] Weighted average shares outstanding - basic (shares) Dilutive potential shares from unvested restricted shares (shares) Incremental Common Shares Attributable To Nonvested Restricted Shares Incremental common shares attributable to nonvested restricted shares. Weighted average shares outstanding - diluted (shares) Earnings per share: Earnings Per Share, Basic and Diluted [Abstract] Fee revenues from Westwood VIEs Variable Interest Entity, Measure of Activity, Revenues Disaggregation of Revenue [Abstract] Disaggregation of Revenue [Table Text Block] Disaggregation of Revenue [Table Text Block] 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] INVESTMENTS Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Level 1 Fair Value, Inputs, Level 1 [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Level 3 Fair Value, Inputs, Level 3 [Member] Fair Value Hierarchy Including NAV [Axis] Fair Value Hierarchy Including NAV [Axis] Fair Value Hierarchy Including NAV [Axis] Fair Value Hierarchy Including NAV [Domain] Fair Value Hierarchy Including NAV [Domain] [Domain] for Fair Value Hierarchy Including NAV [Axis] Inputs, Net Asset Value [Member] Inputs, Net Asset Value [Member] Inputs, Net Asset Value [Member] Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Period Increase (Decrease) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Period Increase (Decrease) Investments in securities: Investments, Fair Value Disclosure [Abstract] Investments in trading securities Alternative Investment Alternative Investment Fair Value, Net Asset (Liability) Fair Value, Net Asset (Liability) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Variable Interest Entities Schedule of Variable Interest Entities [Table Text Block]