Income Tax Disclosure [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] Adoption of ASU 2016-09 [Member] Adoption of ASU 2016-09 [Member] Adoption of ASU 2016-09 [Member] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Effective Income Tax Rate Reconciliation, Percent Effective Income Tax Rate Reconciliation, Percent UnrecognizedTaxBenefitsIncreasesResultingFromCurrentAndPriorPeriodTaxPositions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentAndPriorPeriodTaxPositions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentAndPriorPeriodTaxPositions Unrecognized Tax Benefits Unrecognized Tax Benefits Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Unrecognized Tax Benefits, Increase Resulting from Settlements with Taxing Authorities Unrecognized Tax Benefits, Increase Resulting from Settlements with Taxing Authorities Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit 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 Significant Change in Income Tax Provision is Reasonably Possible, Amount of Unrecorded Benefit Segment Reporting [Abstract] SEGMENT REPORTING Segment Reporting Disclosure [Text Block] Commitments and Contingencies Disclosure [Abstract] Loss Contingencies [Table] Loss Contingencies [Table] Litigation Case Litigation Case [Axis] Litigation Case Litigation Case [Domain] First Lawsuit by AGF First Lawsuit By A G F [Member] First lawsuit by AGF. Second Lawsuit by AGF Second Lawsuit By A G F [Member] Second lawsuit by AGF. Loss Contingency Nature Loss Contingency Nature [Axis] Loss Contingency, Nature Loss Contingency, Nature [Domain] General Damage General Damage [Member] General damage. Special Damage Special Damage [Member] Special damage. Punitive Damage Punitive Damage [Member] Punitive damage. Loss Contingencies [Line Items] Loss Contingencies [Line Items] Lawsuit filing date Loss Contingency, Lawsuit Filing Date Litigation claim for damages Loss Contingency, Damages Sought, Value Percentage of defense costs which will be covered by insurance Percentage Of Defense Costs Covered By Insurance Percentage of defense costs covered by insurance. Insurance proceeds Proceeds from Insurance Settlement, Operating Activities Receivable Loss Contingency, Receivable, Current Organization, Consolidation and Presentation of Financial Statements [Abstract] BALANCE SHEET COMPONENTS Stockholders' Equity Note Disclosure [Text Block] Investments, Debt and Equity Securities [Abstract] Investment Balances Trading Securities [Table 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] Employee Benefits and Share-based Compensation [Abstract] Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type Award Type [Axis] Equity Award Equity Award [Domain] 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. Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Total Expense Recorded for Stock Based Compensation Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Status and Changes in Restricted Stock Grants that Subject to Service Condition Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] 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 Variable Interest Entities [Abstract] Variable interest entities. Schedule Of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Variable Interest Entities Variable Interest Entities [Axis] Variable Interest Entity, Classification Variable Interest Entity, Classification [Domain] Westwood Mutual Fund Westwood Mutual Fund [Member] Westwood Mutual Fund [Member] Common Trust Funds Common Trust Funds [Member] Common trust funds. UCITS Fund Undertaking For Collective Investment In Transferable Securities [Member] Undertaking for collective investment in transferable securities. Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Amount provided to fund for the sole purpose of showing economic substance Variable Interest Entity, Financial or Other Support, Amount New Westwood mutual funds Variable Interest Entity, Financial or Other Support, Number of Entities Variable Interest Entity, Financial or Other Support, Number of Entities Fee revenues from Westwood VIEs Variable Interest Entity, Measure of Activity, Revenues DESCRIPTION OF THE BUSINESS Nature of Operations [Text Block] 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) Goodwill and Intangible Assets Disclosure [Abstract] ACQUISITIONS, GOODWILL AND OTHER INTANGIBLE ASSETS Goodwill and Intangible Assets Disclosure [Text Block] Accounting Policies [Abstract] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Fair Value Measurements Fair Value of Financial Instruments, Policy [Policy Text Block] Variable Interest Entities Consolidation, Variable Interest Entity, Policy [Policy Text Block] 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. Restricted Stock Subject to Service and Performance Conditions Restricted Stock Subject To Service And Performance Conditions Policy [Text Block] Restricted stock subject to service and performance conditions. Goodwill, Impairment Loss Goodwill, Impairment Loss LONG-TERM INCENTIVE COMPENSATION Compensation and Employee Benefit Plans [Text Block] Statement of Cash Flows [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Net income Net Income (Loss) Attributable to Parent 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 Amortization of Intangible Assets Unrealized gains on trading investments Trading Securities, Change in Unrealized Holding Gain (Loss) Stock based compensation expense Share-based Compensation Deferred income taxes Deferred Income Tax Expense (Benefit) Excess tax benefits from stock based compensation Excess Tax Benefit from Share-based Compensation, Operating Activities Other Operating Activities, Cash Flow Statement Other Operating Activities, Cash Flow Statement Change in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Net sales of investments - trading securities Increase (Decrease) in Trading Securities 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 operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations 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 Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations 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 Payments Related to Tax Withholding for Share-based Compensation Excess tax benefits from stock based compensation Excess Tax Benefit from Share-based Compensation, Financing Activities Cash dividends paid Payments of Dividends Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations 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 Common stock issued for acquisition Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Payments for (Proceeds from) Tenant Allowance Payments for (Proceeds from) Tenant Allowance DividendsAccrued DividendsAccrued DividendsAccrued Capital Expenditures Incurred but Not yet Paid Capital Expenditures Incurred but Not yet Paid Earnings Per Share [Abstract] Computation of Basic and Diluted Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] 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 Income (Loss) AOCI Attributable to Parent [Member] Retained Earnings Retained Earnings [Member] Statement [Line Items] Statement [Line Items] New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification BALANCE Stockholders' Equity Attributable to Parent BALANCE, shares Other comprehensive income 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 Dividends, Common Stock Stock based compensation expense Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period 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 Treasury Shares Value Acquired for Benefit Plan Treasury Shares Value Acquired for Benefit Plan Treasury Shares Value Acquired for Benefit Plan Purchases of treasury stock, shares Treasury Stock, Shares, Acquired 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 Stock Issued During Period, Shares, New Issues Stock Issued During Period, Shares, New Issues Stock Issued During Period, Value, New Issues Stock Issued During Period, Value, New Issues Components of Accumulated Other Comprehensive Loss Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Income Statement [Abstract] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] REVENUES: Revenues [Abstract] Advisory fees: Investment Advisory, Management and Administrative Fees [Abstract] Asset-based Investment Advisory Fees Performance-based Performance Fees Trust fees Trust Fees Total fees earned from providing trust and custody services. Other, net Investment Income And Loss Represents the total of realized and unrealized gains and losses on investments and interest and dividend income, including any amortization and accretion (as applicable) of discounts and premiums, earned from (1) investment securities; (2) federal funds; (3) dividend income; or (4) other investments not otherwise specified herein. Total revenues Revenues 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 Total expenses Costs and Expenses Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Provision for income taxes Income Tax Expense (Benefit) Net income Other comprehensive income: 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 Cash dividends declared per share (dollars per share) Common Stock, Dividends, Per Share, Declared Restricted Shares Subject Only to a Service Condition Restricted Stock [Member] Forfeited (shares) Document And Entity Information [Abstract] Document and entity information. Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Document Type Document Type Document Period End Date Document Period End Date Amendment Flag Amendment Flag Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus 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 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 Number of operating segments Number of Reportable Segments Fair Value Disclosures [Abstract] FAIR VALUE MEASUREMENTS Fair Value Disclosures [Text Block] Related Party Transactions [Abstract] RELATED PARTY TRANSACTIONS Related Party Transactions Disclosure [Text Block] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Woodway Financial Advisors Woodway Financial Advisors [Member] Woodway financial advisors. 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 Stock Repurchase Program, Authorized Amount Stock Repurchase Program, Authorized Amount Values of Assets Within Fair Value Hierarchy Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Accounting Changes and Error Corrections [Abstract] 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] Tax rate excluding ASU 2016-09 adoption Tax rate excluding ASU 2016-09 adoption Tax rate excluding ASU 2016-09 adoption EARNINGS PER SHARE Earnings Per Share [Text Block] Schedule Of Investments [Table] Schedule of Investments [Table] VIE Variable Interest Entity [Member] Variable interest entity. Schedule Of Investments [Line Items] Schedule of Investments [Line Items] Estimated Market Value Trading Securities COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Schedule Of Segment Reporting Information By Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Restricted Stock Consolidation Items Consolidation Items [Axis] Consolidation Items Consolidation Items [Domain] Operating Segments Operating Segments [Member] Westwood Holdings Corporate, Non-Segment [Member] Eliminations Intersegment Eliminations [Member] Segments Segments [Axis] Segments Segments [Domain] Advisory Advisory [Member] Advisory. Trust Trust [Member] Trust. Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] ReconciliationFromNetIncomeToNonGaapMeasure [Table Text Block] ReconciliationFromNetIncomeToNonGaapMeasure [Table Text Block] ReconciliationFromNetIncomeToNonGaapMeasure [Table Text Block] Net fee revenues from external sources Fees and Commissions Net intersegment revenues Net Intersegment Revenues Net intersegment revenues. Net interest and dividend revenue Investment Income, Net Other, net Other Revenue, Net 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. Restricted stock expense Intangible amortization Deferred taxes on goodwill Deferred Other Tax Expense (Benefit) Allocated Share-based Compensation Expense Allocated Share-based Compensation Expense Segment assets Assets Segment goodwill Goodwill Related Party Related Party [Axis] Related Party Related Party [Domain] LLCs Limited Liability Company [Member] Westwood Funds® Westwood Funds [Member] Westwood funds. Private Wealth Private Wealth [Member] Private wealth. Institutional Institutional [Member] Institutional. 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. Schedule Of Related Party Transactions By Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Trust Trust for Benefit of Employees [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] 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 Intersegment Balances Schedule of Segment Reporting Information, by Segment [Table Text Block] Canadian Plan Canadian Plan [Member] Canadian Plan. 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. Legal Entity Legal Entity [Axis] Entity Entity [Domain] Westwood International Advisors Inc Westwood International Advisors Inc [Member] Westwood International Advisors Inc. Defined Benefit Plan, Asset Categories [Axis] Defined Benefit Plan, Asset Categories [Axis] Plan Asset Categories [Domain] Plan Asset Categories [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 Remaining unrecognized compensation cost Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options Remaining unrecognized compensation cost recognized over a remaining weighted average period Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Nonvested restricted shares Mutual fund vesting period Share Based Compensation Arrangement With Individual Requisite Service Period Share based compensation arrangement with individual requisite service period. 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. Organization Consolidation And Presentation Of Financial Statements [Table] Organization Consolidation And Presentation Of Financial Statements [Table] Organization consolidation and presentation of financial statements. Organization Consolidation And Presentation Of Financial Statements [Line Items] Organization Consolidation And Presentation Of Financial Statements [Line Items] Organization consolidation and presentation of financial statements. Date of incorporation Entity Incorporation, Date of Incorporation ASSETS Assets [Abstract] Current Assets: Assets, Current [Abstract] Cash and cash equivalents Accounts receivable Accounts Receivable, Net, Current Investments, at fair value Short-term Investments Other current assets Other Assets, Current Total current assets Assets, Current Goodwill Deferred income taxes Deferred Tax Assets, Net, Noncurrent Intangible assets, net Finite-Lived Intangible Assets, Net Property and equipment, net of accumulated depreciation of $4,834 and $4,590 Property, Plant and Equipment, Net Total assets LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable and accrued liabilities Accounts Payable and Accrued Liabilities, Current Dividends payable Dividends Payable, Current Compensation and benefits payable Employee-related Liabilities, Current Contingent consideration Business Combination, Contingent Consideration, Liability, Current Income taxes payable Accrued Income Taxes, Current Total current liabilities Liabilities, Current Accrued dividends Dividends Payable Non Current Dividends payable non current. Deferred rent Deferred Rent Credit, 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 9,989,598 and outstanding 8,888,656 shares at March 31, 2017; issued 9,801,938 and outstanding 8,810,375 shares at December 31, 2016 Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital, Common Stock Treasury stock, at cost - 1,100,942 shares at March 31, 2017; 991,563 shares at December 31, 2016 Treasury Stock, Value Accumulated other comprehensive loss Retained earnings Retained Earnings (Accumulated Deficit) Total stockholders' equity Total liabilities and stockholders' equity Liabilities and Equity 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. Incremental Common Shares Attributable to Dilutive Effect of Contingently Issuable Shares Incremental Common Shares Attributable to Dilutive Effect of Contingently Issuable Shares Weighted average shares outstanding - diluted (shares) Earnings per share: Earnings Per Share, Basic and Diluted [Abstract] Schedule Of Available For Sale Securities [Table] Schedule of Available-for-sale Securities [Table] Investment Type Investment Type [Axis] Investments Investments [Domain] Money market funds Money Market Funds [Member] Equity funds Equity Funds [Member] Major Types of Debt and Equity Securities Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities Major Types of Debt and Equity Securities [Domain] U.S. Government and Government agency obligations US Treasury and Government [Member] Schedule Of Available For Sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Investment balances Trading Securities [Abstract] Cost Trading Securities, Cost Gross Unrealized Gains Trading Securities, Unrealized Holding Gain Gross Unrealized Losses Trading Securities, Unrealized Holding Loss Equity [Abstract] INVESTMENTS Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] 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 VARIABLE INTEREST ENTITIES Variable Interest Entity Disclosure [Text Block] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] 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 Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Investments in securities: Investments, Fair Value Disclosure [Abstract] Investments in trading securities Business Combination, Contingent Consideration, Liability Business Combination, Contingent Consideration, Liability Fair Value, Net Asset (Liability) Fair Value, Net Asset (Liability) Variable Interest Entities Schedule of Variable Interest Entities [Table Text Block] Income Tax Disclosure [Text Block] Income Tax Disclosure [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] Significant Accounting Policies [Text Block] Significant Accounting Policies [Text Block]