Document and Entity Information Statement [Table] Statement [Line Items] Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Current Fiscal Year End Date Entity Current Reporting Status Entity Filer Category Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus Condensed Consolidated Balance Sheets Assets [Abstract] Assets Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents, end of period Cash and cash equivalents, beginning of period Cash and cash equivalents For an unclassified balance sheet, the carrying value of investment management fees receivable. Investment Management Fees Receivable Investment management fees receivable Receivables (Investment management fees) For an unclassified balance sheet, the carrying value of fund administration and distribution fees receivable Fund Administration And Distribution Fees Receivable Fund administration and distribution fees receivable Receivables (Fund administration and distribution fees) Accounts Receivable, Net Receivables Accounts Receivable, Net, Total Prepaid Expense Prepaid expenses Marketable Securities Investments Property, Plant and Equipment, Net Property and equipment, net Goodwill. Goodwill Intangible Assets, Net (Excluding Goodwill) Other intangible assets, net Other Assets Other assets Assets Total assets Liabilities and Equity [Abstract] Liabilities and stockholders' equity Sum of the carrying values as of the balance sheet date of obligations incurred through that date, including liabilities incurred and payable to vendors for goods and services received, taxes, interest, rent and utilities, contractual rights and obligations, and statutory obligations. Accounts Payable and Accrued Liabilities, Excluding Employee Benefits Accounts payable and accrued expenses Accrued Employee Benefits Accrued compensation and benefits Accrued Liabilities Accrued expenses Accounts payable and accrued expenses (fund reimbursements) Amount of consideration and contingent consideration payable, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. Business Combination, Consideration Payable Consideration payable for acquisition of business Deferred Income Tax Liabilities, Net Deferred tax liability, net Other Liabilities Other liabilities Other liabilities (promissory note) Long-term Debt Long-term debt Long-term debt Liabilities Total liabilities Stockholders' Equity Attributable to Parent [Abstract] Stockholders' equity: Common Stock, Value, Outstanding Common stock Additional Paid in Capital Additional paid-in capital Treasury Stock, Value Treasury stock, at cost Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive income (loss) Retained Earnings (Accumulated Deficit) Retained deficit Stockholders' Equity Attributable to Parent Balance at end of period Balance at beginning of period Total stockholders’ equity Liabilities and Equity Total liabilities and stockholders’ equity Common Stock, Par or Stated Value Per Share Common stock, par value Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Shares, Issued Common stock, shares issued Common Stock, Shares, Outstanding Balance at end of period (in shares) Balance at beginning of period (in shares) Common stock, shares outstanding Treasury Stock, Shares Treasury stock, shares Condensed Consolidated Statements of Operations Revenues [Abstract] Revenue Revenue from Contract with Customer, Excluding Assessed Tax Total revenue Costs and Expenses [Abstract] Expenses Salaries, Wages and Officers' Compensation Personnel compensation and benefits Noninterest Expense Distribution and Servicing Fees Distribution and other asset-based expenses General and Administrative Expense General and administrative Depreciation, Depletion and Amortization Depreciation and amortization Depreciation and amortization Business Combination, Acquisition Related Costs Acquisition-related costs Acquisition related costs Restructuring and Related Cost, Incurred Cost Restructuring and integration costs Operating Expenses Total operating expenses Operating Income (Loss) Income from operations Nonoperating Income (Expense) [Abstract] Other income (expense) Investment Income, Net Interest income and other income/(expense) Financing Interest Expense Interest expense and other financing costs Gains (Losses) on Extinguishment of Debt Loss on debt extinguishment Loss on debt extinguishment Nonoperating Income (Expense) Total other income (expense), net Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Income (loss) before income tax (expense) benefit Income Tax Expense (Benefit) Income tax (expense) benefit Net Income (Loss) Attributable to Parent Net income Net income (loss) Net income Earnings Per Share, Basic and Diluted [Abstract] Earnings (loss) per share of common stock Earnings per share: Earnings Per Share, Basic Earnings per share—basic Basic (in dollars per share) Earnings Per Share, Diluted Earnings per share—diluted Diluted (in dollars per share) Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Shares: Weighted average number of shares outstanding Weighted Average Number of Shares Outstanding, Basic Weighted average shares outstanding—basic Weighted Average Number of Shares Outstanding, Diluted Weighted average shares outstanding—diluted Diluted: Weighted average number of shares outstanding Condensed Consolidated Statements of Comprehensive Income (Loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Net unrealized income on available-for-sale securities Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Net unrealized gain (loss) on foreign currency translation Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Net current period other comprehensive income/(loss) Total other comprehensive income (loss), net of tax Other comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income/(loss) Consolidated Statements of Changes in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity Stock Issued During Period, Value, New Issues Issuance of common stock Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs Class A common stock offering costs Equity impact of the value of stock redesignated during the period. Stock Redesignated During Period, Value Redesignation of common stock Equity impact of share conversion. Share Conversion, Value Share conversion - Class B to A Treasury Stock, Retired, Cost Method, Amount Repurchase of shares Value of shares withheld related to net settlement of equity awards. Shares Withheld Related to Net Settlement of Equity Awards Shares withheld related to net settlement of equity awards Stock Issued During Period, Value, Stock Options Exercised Exercise of options Cumulative Effect on Retained Earnings, Net of Tax Cumulative effect of adoption of ASU Cumulative effect of adoption of ASU Value of fractional shares retired during the period. Fractional Shares Retired Fractional shares retired Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Share-based compensation Dividends Dividends paid Consolidated Statements of Cash Flows Net Cash Provided by (Used in) Operating Activities [Abstract] Cash flows from operating activities Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Deferred Income Taxes and Tax Credits Provision for deferred income taxes The cash outflows for payments deferred financing costs and derivative and accretion expense. Payments of Deferred Financing Costs And Derivative And Accretion Expense Deferred financing costs and derivative and accretion expense Employee Benefits and Share-based Compensation, Noncash Stock-based and deferred compensation Increase (Decrease) in Trading Securities Unrealized depreciation (appreciation) on investments Income (Loss) from Equity Method Investments Loss on equity method investment Losses recorded under the equity method of accounting Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Increase (Decrease) in Accounts Receivable and Other Operating Assets Receivables Increase (Decrease) in Prepaid Expense Prepaid expenses Increase (Decrease) in Other Noncurrent Assets Other assets The increase (decrease) during the reporting period in other obligations or expenses incurred but not yet paid, excluding compensation and benefits. Increase (Decrease) in Accounts Payable and Accrued Expenses, Excluding Employee Benefits Accounts payable and accrued expenses Increase (Decrease) in Employee Related Liabilities Accrued compensation and benefits Increase (Decrease) in Other Noncurrent Liabilities Other liabilities Net Cash Provided by (Used in) Operating Activities Net cash provided by operating activities Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flows from investing activities Payments to Acquire Property, Plant, and Equipment Purchases of property and equipment Payments to Acquire Investments Purchases of trading securities Proceeds from Sale, Maturity and Collection of Investments Sales of trading securities Payments to Acquire Equity Method Investments Equity method investment Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Cash flows from financing activities Proceeds from Issuance of Common Stock Issuance of common stock, net of costs Payments for Repurchase of Common Stock Repurchase of common stock Payments of Stock Issuance Costs Payment of Class A common stock deferred offering costs Payments Related to Tax Withholding for Share-based Compensation Payments of taxes related to net share settlement of equity awards Proceeds from Issuance of Senior Long-term Debt Proceeds from long-term senior debt Payments of Financing Costs Payment of debt financing fees Repayments of Senior Debt Repayment of long-term senior debt Repayments of Notes Payable Repayment of promissory note Payments of Dividends Payment of dividends Net Cash Provided by (Used in) Financing Activities Net cash used in by financing activities Effect of Exchange Rate on Cash and Cash Equivalents Effect of changes of foreign exchange rate on cash and cash equivalents Net Cash Provided by (Used in) Continuing Operations Net increase (decrease) in cash and cash equivalents Supplemental Cash Flow Elements [Abstract] Supplemental cash flow information Interest Paid Cash paid for interest Income Taxes Paid, Net Cash paid for income taxes Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Supplemental disclosure of non-cash items Represents common stock offering costs reclassified from prepaid expenses to additional paid in capital. Reclassification of Common Stock Offering Costs Class A common stock offering costs reclassed from prepaid expenses and accounts payable and accrued expenses to additional paid in capital Organization and Nature of Business Nature of Operations [Text Block] Organization and Nature of Business Basis of Presentation and Significant Accounting Policies Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Basis of Presentation and Significant Accounting Policies Revenue Recognition Revenue from Contract with Customer [Text Block] Revenue Recognition Acquisitions Business Combination Disclosure [Text Block] Acquisition Fair Value Measurements Fair Value Disclosures [Text Block] Fair Value Measurements Related Party Transactions Related Party Transactions Disclosure [Text Block] Related Party Transactions Investments. Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Investments Income Taxes Income Tax Disclosure [Text Block] Income Taxes Debt Debt Disclosure [Text Block] Debt Equity Stockholders' Equity Note Disclosure [Text Block] Equity Share Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Share Based Compensation Earnings per Share Earnings Per Share [Text Block] Earnings Per Share Equity Method Investment Equity Method Investments and Joint Ventures Disclosure [Text Block] Equity Method Investment Accumulated Other Comprehensive Loss Comprehensive Income (Loss) Note [Text Block] Accumulated Other Comprehensive Loss Basis of Accounting, Policy [Policy Text Block] Basis of Presentation Disclosure of accounting policy for retroactive adjustments for common stock split. Retroactive Adjustments for Common Stock Split [Policy Text Block] Retroactive Adjustments for Common Stock Split Consolidation, Policy [Policy Text Block] Principles of Consolidation Use of Estimates, Policy [Policy Text Block] Use of Estimates and Assumptions Revenue Recognition, Policy [Policy Text Block] Revenue Recognition Selling, General and Administrative Expenses, Policy [Policy Text Block] Distribution and Other Asset Based Expenses Business Acquisition, Integration, Restructuring and Other Related Costs [Text Block] Restructuring and Integration Costs Earnings Per Share, Policy [Policy Text Block] Earnings per share Debt, Policy [Policy Text Block] Debt Modification New Accounting Pronouncements, Policy [Policy Text Block] Adoption of New Accounting Standards and Recent Accounting Pronouncements Restructuring and Related Costs [Table Text Block] Summary of rollforward of restructuring and integration liabilities Disaggregation of Revenue [Table Text Block] Schedule of disaggregation of revnue by type and product Contract with Customer, Asset and Liability [Table Text Block] Schedule of balances of receivables from contracts with customers Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Line Items] Acquisitions Tabular disclosure of acquisition related cost. Business Acquisition, Related Cost [Table Text Block] Summary of acquisition related cost Schedule of Business Acquisitions by Acquisition, Contingent Consideration [Table Text Block] Summary of contingent consideration Schedule of Related Party Transactions [Table Text Block] Summary of related party transactions Investment Income [Table] Gain (Loss) on Investments [Line Items] Available-for-sale Securities [Table Text Block] Summary of the cost and fair value of investments Trading Securities [Table Text Block] Cost and fair value of investments Realized Gain (Loss) on Investments [Table Text Block] Summary of proceeds and realized gains and losses Schedule of Long-term Debt Instruments [Table Text Block] Schedule of components of long-term debt Tabular disclosure of each detailed component of interest expense, debt issuance cost amortization and other financing costs. Schedule Of Interest Expense And Other Financing Costs, By Component [Table Text Block] Schedule of components of interest expense and other financing costs Schedule of Stockholders Equity [Table Text Block] Schedule of changes in the number of shares of common stock issued and repurchased Share-based Compensation, Activity [Table Text Block] Summary of activity related to stock option awards and restricted stock awards Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Summary of computation of basic and diluted earnings per share Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Summary of changes in accumulated other comprehensive income/(loss) by component Schedule of Variable Interest Entities [Table] Variable Interest Entity [Line Items] NA Retroactive Adjustments for Common Stock Split [Abstract] Retroactive Adjustments for Common Stock Split Stockholders' Equity Note, Stock Split, Conversion Ratio Stock split Variable Interest Entity, Not Primary Beneficiary, Disclosures [Abstract] Variable Interest Entities Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount Maximum risk of loss related to unconsolidated sponsored VIE investment funds Schedule of Restructuring and Related Costs [Table] Restructuring Cost and Reserve [Line Items] Restructuring and Integration Costs Restructuring Reserve [Roll Forward] Rollforward of restructuring and integration liabilities Restructuring Reserve Liability balance, end of year Liability balance, beginning of year Restructuring Charges Severance expense Payments for Restructuring Settlement of liabilities New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements and Changes in Accounting Principles [Abstract] Recent Accounting Pronouncements Disaggregation of Revenue [Table] Disaggregation of Revenue [Line Items] Disaggregation of revenue Contract with Customer, Asset, Net Receivables from contracts with customers Other Receivables Non-customer receivables Percentage of voting equity interests to be acquired at the acquisition date as part of a purchase agreement in a business combination. Business Acquisition, Purchase Agreement, Percentage of Voting Interests to be Acquired Equity interest to be acquired (as a percent) Percentage of equity interest to be acquired at the date acquisition date as part of a purchase agreement. Business Acquisition, Purchase Agreement, Percentage of Equity Interests to be Acquired Equity interest to be acquired (as a percent) The expected cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. Expected Cash Payments to Acquire Businesses, Gross Cash to be paid at closing Advisory contract revenue hurdle for no purchase price adjustment based on consents. Business Combination, Minimum Revenue Percentage of Investment Advisory Consents Advisory contract revenue hurdle for no purchase price adjustment based on consents Post-closing adjustment period for business acquisition. Business Combination, Post-Closing Adjustment Period Post-closing adjustment period Represents the number of annual contingent payments. Number of Annual Contingent Payments Number of annual contingent payments The maximum aggregate contingent payment. Business Combination Future Aggregate Contingent Payments, Maximum Maximum aggregate contingent payment Represents the maximum annual contingent payment to be paid per purchase agreement. Business Combination, Base Annual Contingent Payment, Maximum Maximum annual contingent payment Represents the period of time over which contractual contingent payments are made as part of a business acquisition. Business Acquisition, Contingent Payment Period Period of time over which contingent payments will be made Minimum revenue run rate required for contingent payment. Minimum Revenue Run Rate, Contingent Payment Minimum revenue run rate required to earn any contingent payment (as a percent) Minimum revenue run rate required to earn maximum contingent payment. Minimum Revenue Run Rate, Maximum Contingent Payment Minimum revenue run rate required to earn maximum contingent payment (as a percent) Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Liabilities, Fair Value Disclosure [Abstract] Financial Liabilities Business Combination, Contingent Consideration, Liability Balance, Contingent Consideration Arrangements Amount of transfers of assets measured on a recurring basis between Levels. Fair Value, Assets, Transfer Between Levels, Amount Transfers between levels Investments, Fair Value Disclosure Investments, fair value Schedule of Related Party Transactions, by Related Party [Table] Related Party Transaction [Line Items] Related Party Transactions Due from Related Parties, Unclassified [Abstract] Related party assets Available-for-sale Securities. Investments (Available-for-sale securities, fair value) Available-for-sale securities, at fair value Trading Securities Investments (Trading securities, at fair value) Trading securities, at fair value Due from Related Parties Total Due to Related Parties [Abstract] Related party liabilities Due to Related Parties Total NA Related Party Revenue [Abstract] Related party revenue NA Related Party Expense [Abstract] Related party expense Represents the expense related to the distribution and other assets. Distribution and Other Asset Based Expense Distribution and other asset-based expenses (fund reimbursements) The aggregate total of expenses, net of offsets, of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. General and Administrative Expense, Net General and administrative Represents the expense pertaining to the Related party. Related Party Expenses Total NA Related Party Other Income Expense [Abstract] Related party other income (expense) Amount of interest expense and other income (expense). Interest Expense and Other Income (Expense) Interest expense and other income/(expense) The net amount of interest income (expense) and other financing costs. Interest Income (Expense) and Other Financing Costs, Net Interest expense and other financing costs (promissory note) Represents the other income (expense) pertaining to the related party. Related Party Other Income (Expense) Total Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Line Items] Investments Available-for-sale Securities, Amortized Cost Basis Cost Available-for-sale Securities, Gross Unrealized Gain Gross unrealized gains Available-for-sale Securities, Gross Unrealized Loss Gross unrealized losses Available-for-sale Securities, Gross Realized Gain (Loss), Disclosures [Abstract] Proceeds and realized gains and losses recognized Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds Sale Proceeds Trading Securities [Table] Schedule of Trading Securities and Other Trading Assets [Line Items] Investments Trading Securities, Cost Cost Trading Securities, Unrealized Holding Gain Gross unrealized gains Trading Securities, Unrealized Holding Loss Gross unrealized losses Trading Securities, Realized Gain (Loss) [Abstract] Proceeds and realized gains and losses recognized Proceeds from Sale of Trading Securities Held-for-investment Sale Proceeds Trading Securities, Realized Gain Realized gains Trading Securities, Realized Loss Realized losses Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Federal income tax at U.S. statutory rate Deferred Tax Assets, Valuation Allowance Valuation allowance, deferred tax assets Schedule of Short-term Debt [Table] Debt Instrument [Line Items] Debt Debt Instrument, Face Amount Principal amount Long-term Debt, Gross Principal outstanding Deferred Finance Costs, Net Unamortized debt issuance costs Debt Instrument, Unamortized Discount Unamortized debt discount Debt Instrument, Interest Rate, Stated Percentage Fixed interest rate (as a percent) Debt Instrument, Interest Rate, Effective Percentage Effective interest rate (as a percent) Annual amortization percentage associated with debt instrument. Debt Instrument, Annual Amortization Percentage Annual amortization percentage Repayments of Debt Repayments of debt Interest Expense, Debt Interest expense Amortization of Debt Issuance Costs Amortization of debt issuance costs Amortization of Debt Discount (Premium) Amortization of debt discount The amount of base payment accretion expense. Base Payment Accretion Expense CEMP base payment accretion expense Interest Expense, Other Other Interest and Debt Expense Total Schedule of Long-term Debt Instruments [Table] Debt Instrument, Term Debt Term Interest rate term for debt instrument. Debt Insturment, Interest Rate Term Interest rate term Line of Credit Facility, Maximum Borrowing Capacity Maximum borrowing capacity Stock Issued During Period, Shares, New Issues Issuance of shares Number of shares redesignated during the period. Stock Redesignated During Period, Shares Redesignation of common stock, (in shares) Represents the shares converted between different classes of common stock. Share Conversion, Shares Share conversion - Class B to A (in shares) Treasury Stock, Shares, Acquired Number of shares acquired Repurchase of shares Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Vesting of restricted share grants (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Exercised Exercise of options (in shares) Number of fractional shares retired during the period. Fractional Shares Retired, Shares Fractional shares retired (in shares) Number of shares withheld related to net settlement of equity awards. Shares Withheld Related to Net Settlement of Equity Awards, Shares Shares withheld related to net settlement of equity awards Treasury Stock Acquired, Average Cost Per Share Average cost of acquired shares (in dollars per share) Treasury Stock, Value, Acquired, Cost Method Cost of acquired shares Stock Repurchase Program, Remaining Authorized Repurchase Amount Remaining authorized amount for share repurchase program Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share Based Compensation Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Granted (in shares) Total number of restricted shares granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Vested (in shares) Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Vesting period from grant date Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Avgwtd grant-date fair value Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value Outstanding at the end of period Outstanding at the beginning of period Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Weighted Average Grant Date Fair Value Forfeited (in dollars per share) Weighted average grant-date fair value of options exercised. Share-based Compensation Arrangement by Share-based Payment Award, Options, Options Exercised, Weighted Average Grant Date Fair Value Exercised (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Weighted Average Grant Date Fair Value Vested (in dollars per share) Weighted average grant-date fair value of non-vested options outstanding. Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Outstanding, Weighted Average Grant Date Fair Value Nonvested (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Avg wtd exercise price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Outstanding at the end of the period Outstanding at the beginning of period Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Granted (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Forfeited (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Exercised (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Vested (in dollars per share) The weighted average grant-date fair value of non-vested options. Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Exercise Price Nonvested (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Units Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Outstanding at the end of the period Outstanding at the beginning of period Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares Nonvested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Avg wtd 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 Unvested at end of period Unvested at beginning of period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Forfeited Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Units Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Unvested at end of period Unvested at beginning of period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Forfeited (in shares) The amount of cash bonuses and distributions related to all dividends previously declared on restricted shares and options expected to vest in the future. Cash Bonuses And Dividends Amount of cash bonuses and distributions related to all dividends previously declared on unvested shares Allocated Share-based Compensation Expense Stock based compensation expense Earnings Per Share Reconciliation [Abstract] Computation of basic and diluted earnings per share Net Income (Loss) Available to Common Stockholders, Basic Net income Weighted Average Number of Shares Issued, Basic Basic: Weighted average number of shares outstanding Incremental Common Shares Attributable to Dilutive Effect of Nonvested Shares with Forfeitable Dividends Plus: Incremental shares from assumed conversion of dilutive instruments Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Number of shares excluded from the computations of weighted average shares for diluted EPS because the effects would be anti dilutive Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Line Items] Equity Method Investment Equity Method Investments Equity method investment Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Loss AOCI Attributable to Parent, Net of Tax [Roll Forward] Changes in accumulated other comprehensive income/(loss) by component OCI, before Reclassifications, before Tax, Attributable to Parent Other comprehensive income/(loss) before reclassification and tax Other Comprehensive Income (Loss) before Reclassifications, Tax Tax impact Class of Stock [Axis] Class Of Stock [Domain] Class of Stock [Domain] Common Class A [Member] Class A Common Class B [Member] Class B Products and Services [Axis] Products And Services [Domain] Products and Services [Domain] Investment management fees. Investment Management Fees [Member] Investment management fees Fund administration and distribution fees. Fund Administration And Distribution Fees [Member] Fund administration and distribution fees Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock [Member] Common Stock Treasury Stock [Member] Treasury Stock Additional Paid In Capital [Member] Additional Paid-In Capital Accumulated Other Comprehensive Income [Member] Accumulated Other Comprehensive Income (Loss) Retained Earnings [Member] Retained Deficit Represents information prior to the initial public offering. Prior To Initial Public Offering [Member] Pre-IPO Investments by Category [Axis] Gain Loss On Investments Including Marketable Securities And Investments Held At Cost Categories Of Investments [Domain] Marketable Securities and Investments Held at Cost [Domain] Availableforsale Securities [Member] Available For Sale Securities Trading Account Assets [Member] Trading Securities. Variable Interest Entities [Axis] Classification Of Variable Interest Entity [Domain] Variable Interest Entity, Classification [Domain] Represents information pertaining to Cerebellum Capital, LLC. Cerebellum Capital Llc [Member] Cerebellum Capital, LLC Adjustments for New Accounting Pronouncements [Axis] Type Of Adoption [Member] Type of Adoption [Domain] Accounting Standards Update201601 [Member] ASU 2016-01 Accounting Standards Update 2018-02 Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. Accounting Standards Update201802 [Member] ASU 2018-02 Scenario [Axis] Scenario Unspecified [Domain] Scenario, Unspecified [Domain] Scenario Adjustment [Member] Adjustment Performance-based investment fees. Performance Based Investment Fee [Member] Performance-based investment fees Fund administration fees. Fund Administration Fee [Member] Administration fees Fund distribution fees. Fund Distribution Fee [Member] Fund distribution fees Contract with Customer, Sales Channel [Axis] Contract With Customer Sales Channel [Domain] Contract with Customer, Sales Channel [Domain] Information related to mutual funds. Mutual Funds [Member] Mutual funds Information pertaining to Exchange Traded Funds. Exchange Traded Fund [Member] ETF's Information pertaining to investment activities associated with separate accounts and other vehicles. Separate Accounts And Other Vehicles [Member] Separate accounts and other vehicles Business Acquisition [Axis] Business Acquisition Acquiree [Domain] Business Acquisition, Acquiree [Domain] Information pertaining to Harvest. Harvest [Member] Harvest Information pertaining to USAA Asset Management Company and USAA Shareholder Account Services. Usaa Asset Management And Usaa Shareholder Account Services [Member] USAA Asset Management and USAA Shareholder Account Services Related Party [Axis] Related Party [Domain] Related Party [Domain] Represents information pertaining to mutual fund administrative services to the Victory Portfolios, Victory Variable Insurance Funds, Victory Institutional Funds and the mutual fund series of Victory Portfolios II (collectively, the Victory Funds), a family of open end mutual funds. Victory Funds [Member] VCH Debt Instrument [Axis] Debt Instrument Name [Domain] Debt Instrument, Name [Domain] Represents information pertaining to the various term loans for the credit agreement. Term Loans [Member] Term Loans Represents information relating to loan due February 2025 Term Loan Due February Twenty Twenty Five [Member] Due February 2025 Commitment letter with Royal Bank of Canada and Barclays PLC for incremental term loan facility. Royal Bank Of Canada And Barclays Bank [Member] RBC and Barclays Range [Axis] Range [Member] Range [Domain] Maximum [Member] Maximum Represents the new seven year senior secured first lien term loan facility. Usaa Amco Term Loan Facility [Member] USAA AMCO Term Loan Facility Represents the new five-year senior secured first lien revolving credit facility. Usaa Amco Credit Facilities [Member] USAA AMCO Credit Facilities Award Type [Axis] Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Equity Award [Domain] Restricted Stock [Member] Restricted shares Vesting [Axis] Vesting [Domain] Vesting [Domain] Tenth portion of share-based compensation award differentiated by a particular vesting feature, including, but not limited to, performance measure or service period. Share Based Compensation Award Tranche Ten [Member] Vest over three years Eleventh portion of share-based compensation award differentiated by a particular vesting feature, including, but not limited to, performance measure or service period. Share Based Compensation Award Tranche Eleven [Member] Vest over five years Employee Stock Option [Member] Stock options Information pertaining to stock options and restricted stock. Employee Stock Option And Restricted Stock [Member] Stock Options and Restricted Shares Investment, Name [Axis] Equity Method Investee Name [Domain] Investment, Name [Domain] Represents information pertaining to Cerebellum. Cerebellum [Member] Cerebellum Accumulated Net Unrealized Investment Gain Loss [Member] Available-for-sale Securities Accumulated Translation Adjustment [Member] Cumulative Translation Adjustment