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] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Equity Compensation Plan 2011 Equity Compensation Plan 2011 [Member] Equity Compensation Plan 2011 [Member] Reorganization Equity Compensation Plan 2011 Reorganization Equity Compensation Plan 2011 [Member] Reorganization Equity Compensation Plan 2011 [Member] Award Type [Axis] Award Type [Axis] Award Type [Domain] Equity Award [Domain] Service Based Stock Unit Service Based Stock Unit [Member] Service based stock unit. Performance Based Stock Units Performance Shares [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Shares authorized Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Granted (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Granted, weighted average grant date fair value (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 Compensation expense related to the vesting terms of ownership interests Allocated Share-based Compensation Expense The aggregate intrinsic value of stock units that vested Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Aggregate Intrinsic Value Aggregate intrinsic value of awards vested during current period. Unrecognized compensation expense related to unvested awards Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Weighted average period of unrecognized compensation expense (years) Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Aggregate intrinsic value of shares vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested Income Tax Disclosure [Abstract] Income Tax Disclosure [Table] Income Tax Disclosure [Table] Income Tax Disclosure [Table] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Manning & Napier Group, LLC Manning And Napier Group Llc [Member] Manning and Napier Group Llc. Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Income Tax Disclosure [Line Items] Income Tax Disclosure [Line Items] [Line Items] for Income Tax Disclosure [Table] Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Percentage of cash savings payable under tax receivable agreement (percent) Percentage of Cash Savings Payable Under Tax Receivable Agreement Percentage of Cash Savings Payable Under Tax Receivable Agreement Percentage of cash savings receivable under tax receivable agreement Tax Receivable Agreement, Percentage of Cash Savings Tax Receivable Agreement, Percentage of Cash Savings Payments due to selling unit holders Amounts Payable Under Tax Receivable Agreement Current And Noncurrent Amounts payable under tax receivable agreement (TRA), current and noncurrent portions. Amounts payable under tax receivable agreement Expected Tra Payments Current Expected amounts to be paid under tax receivable agreement (TRA) during the next twelve months. Change in amounts payable under tax receivable agreement Change in Amounts Payable under Tax Receivable Agreement Change in amounts payable under tax receivable agreement (TRA). Payment pursuant to the TRA Amount Paid Under Tax Receivable Agreement During Period Amount Paid Under Tax Receivable Agreement During Period Interest expense (less than) Income Tax Examination, Interest Expense Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Class A common stock Common Class A [Member] Class B common stock Common Class B [Member] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock Common Stock [Member] Additional Paid-In Capital Additional Paid-in Capital [Member] Retained Deficit Retained Earnings [Member] Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Noncontrolling Interest Noncontrolling Interest [Member] Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Balance, Shares Shares, Outstanding Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Distributions to noncontrolling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Net changes in unrealized investment securities gains or losses Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Common stock issued under equity compensation plan, shares Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Common stock issued under equity compensation plan, net of forfeitures Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Equity-based compensation Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Dividends declared on Class A common stock Dividends, Common Stock, Cash Shares withheld to satisfy tax withholding requirements related to restricted stock units vested Adjustments Related to Tax Withholding for Share-based Compensation Impact of changes in ownership of Manning & Napier Group, LLC (Note 4) Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Balance Balance, Shares Business Combinations [Abstract] Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Schedule of Assumptions Used for Fair Value of Contingent Consideration [Table Text Block] Schedule of Assumptions Used for Fair Value of Contingent Consideration [Table Text Block] Schedule of Assumptions Used for Fair Value of Contingent Consideration [Table Text Block] Statement of Comprehensive Income [Abstract] Net income attributable to controlling and noncontrolling interests Net unrealized holding loss on investment securities, net of tax Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Reclassification adjustment for realized (gains) losses on investment securities included in net income Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Less: Comprehensive income attributable to noncontrolling interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Comprehensive income attributable to Manning & Napier, Inc. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Noncontrolling Interest [Abstract] Income before provision for income taxes Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Less: loss before provision for income taxes of Manning & Napier, Inc. Earnings Before Income Taxes Parent Entity Only Earnings before income taxes of Parent Entity only. Income before provision for income taxes, as adjusted Earnings Before Income Taxes Entities Other Than Parent Earnings before income taxes of entities other than Parent Entity. Controlling interest percentage Noncontrolling Interest, Weighted Average Ownership Percentage by Parent Noncontrolling Interest, Weighted Average Ownership Percentage by Parent Net income attributable to controlling interest Parent Entity Interest In Earnings Before Income Taxes Entities Other Than Parent Parent entity's interest in earnings before income taxes of entities other than parent. Plus: (loss) gain before provision for income taxes of Manning & Napier, Inc. Loss Before Income Taxes Parent Entity Only Loss before income taxes parent entity only. Income before income taxes attributable to Manning & Napier, Inc. Income Parent Entity Before Income Taxes Income parent entity before income taxes. Less: provision (benefit) for income taxes of Manning & Napier, Inc. Provision For Income Taxes Parent Entity Provision for income taxes parent entity. Net income attributable to Manning & Napier, Inc. Net Income (Loss) Attributable to Parent Provision for income taxes Income Tax Expense (Benefit) Fair Value Disclosures [Abstract] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Rainier Investment Management, LLC [Member] Rainier Investment Management, LLC [Member] Rainier Investment Management, LLC [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value, Measurements, 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] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Domain] Major Types of Debt and Equity Securities [Domain] Equity securities Equity Securities [Member] Fixed income securities Fixed Income Securities [Member] Mutual funds Managed Mutual Funds [Member] Managed mutual funds. Mutual funds - consolidated funds Managed Mutual Funds, Consolidated Funds [Member] Managed Mutual Funds, Consolidated Funds [Member] Hedge Funds Hedge Funds [Member] U.S. Treasury notes US Treasury Notes Securities [Member] Short-term investments Short-term Investments [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] Trading securities, at fair value Trading Securities Available-for-sale securities, at fair value Available-for-sale Securities Derivatives assets Derivative Asset Total assets at fair value Investments, Fair Value Disclosure Contingent consideration liability Business Combination, Contingent Consideration, Liability Derivative liability Derivative Liability Total liabilities at fair value Financial and Nonfinancial Liabilities, Fair Value Disclosure Business Combination, Liabilities Arising from Contingencies, Amount Recognized Business Combination, Liabilities Arising from Contingencies, Amount Recognized Related Party Transactions [Abstract] Related Party Transactions Related Party Transactions Disclosure [Text Block] Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Revolving Credit Facility $100.0 Million [Member] Revolving Credit Facility $100.0 Million [Member] Revolving Credit Facility $100.0 Million [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving Credit Facility Revolving Credit Facility [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Debt Instrument, Term Debt Instrument, Term Revolving line of credit, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Line of Credit Facility Increase Additional Borrowings On Condition Satisfaction Line of Credit Facility Increase Additional Borrowings On Condition Satisfaction Line of Credit Facility Increase Additional Borrowings On Condition Satisfaction Line of Credit Facility, Capacity Available for Specific Purpose Other than for Trade Purchases Line of Credit Facility, Capacity Available for Specific Purpose Other than for Trade Purchases Line of Credit Facility Capacity Available for Swingline Facility Line of Credit Facility Capacity Available for Swingline Facility Line of Credit Facility Capacity Available for Swingline Facility Amount outstanding Line of Credit Facility, Fair Value of Amount Outstanding Debt Issuance Cost Debt Issuance Cost Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum Line of Credit Facility LIBOR Based Loan Basis Spread on Alternative Base Rate Line of Credit Facility LIBOR Based Loan Basis Spread on Alternative Base Rate Line of Credit Facility LIBOR Based Loan Basis Spread on Alternative Base Rate Line of Credit Facility Base Rate Loan Basis Spread on Alternative Base Rate Line of Credit Facility Base Rate Loan Basis Spread on Alternative Base Rate Line of Credit Facility Base Rate Loan Basis Spread on Alternative Base Rate Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Minimum Interest Coverage Ratio Minimum Interest Coverage Ratio Minimum Interest Coverage Ratio Maximum Leverage Ratio Maximum Leverage Ratio Maximum Leverage Ratio Stock Units Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Stock unit awards, beginning balance (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 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 Stock unit awards, ending balance (shares) Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Stock unit awards, beginning balance, weighted average grant date fair value (dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Vested, weighted average grant date fair value (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, weighted average grant date fair value (dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Stock unit awards, ending balance, weighted average grant date fair value (dollars per share) Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Investments [Abstract] Investment Holdings [Table] Investment Holdings [Table] Investment Type [Axis] Investment Type [Axis] Investment Type Categorization [Domain] Investments [Domain] Manning & Napier Fund Manning & Napier Fund [Member] Manning & Napier Fund [Member] Investment Holdings [Line Items] Investment Holdings [Line Items] Available-for-sale securities, Cost Available-for-sale Debt Securities, Amortized Cost Basis Available-for-sale Debt Securities, unrealized gains Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax Available-for-sale Debt Securities, unrealized losses Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax Total investment securities Investment Owned, at Fair Value Borrowings Debt Disclosure [Text Block] Goodwill and Intangible Assets Disclosure [Abstract] Amortization of Intangible Assets Amortization of Intangible Assets 2017 Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 2018 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2019 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2010 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Five Thereafter Finite-Lived Intangible Assets, Amortization Expense, after Year Five Total Finite-Lived Intangible Assets, Net Statement of Financial Position [Abstract] Class A common stock Common stock, par value 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 Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization and Nature of the Business Nature of Operations [Text Block] Schedule of investment securities holdings Investment Holdings, Schedule of Investments [Table Text Block] Realized gains and losses on the sale of securities Gain (Loss) on Investments [Table Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Schedule of Derivative Instruments Schedule of Derivative Instruments [Table Text Block] Schedule of Derivative Instruments Gains and Losses Derivative Instruments, Gain (Loss) [Table Text Block] Offsetting of Managed Futures Offsetting Liabilities [Table Text Block] Property, Plant and Equipment [Abstract] Property and Equipment Components Property, Plant and Equipment [Table Text Block] Compensation and Retirement Disclosure [Abstract] Employee Benefit Plan Compensation and Employee Benefit Plans [Text Block] Goodwill [Roll Forward] Goodwill [Roll Forward] Balance, beginning of period Goodwill Goodwill acquired Goodwill, Acquired During Period Balance, end of period Goodwill impairment loss Goodwill, Impairment Loss Maximum annual 401(k) contribution per employee (percent) Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent 401(k) employer matching contribution (percent) Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay 401(k) employer matching contribution, maximum employee compensation (percent) Defined Contribution Plan, Employer Matching Contribution, Maximum Compensation Percent Defined Contribution Plan, Employer Matching Contribution, Maximum Compensation Percent 401(k) Plan vesting period (years) Defined Contribution Plan, Employers Matching Contribution, Vesting Period Defined Contribution Plan, Employers Matching Contribution, Vesting Period 401(k) Plan employer contribution amount Defined Contribution Plan, Cost Recognized Profit Sharing Plan contribution amount Profit Sharing Plan, Cost Recognized Profit Sharing Plan, Cost Recognized Quarterly Financial Information Disclosure [Abstract] Revenue Sales Revenue, Services, Net Operating income (loss) Operating Income (Loss) Net income attributable to Manning & Napier, Inc. Net income available to Class A common stock per share - diluted Earnings Per Share, Diluted Weighted average shares of Class A common stock - diluted (shares) Weighted Average Number of Shares Outstanding, Basic and Diluted Cash dividends declared per share of Class A common stock (dollars per share) Common Stock, Dividends, Per Share, Declared Non-cash equity-based compensation charges Share-based Compensation Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Table] Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Table] Adjustments for Error Corrections [Axis] Adjustments for Error Corrections [Axis] Adjustments for Error Correction [Domain] Adjustments for Error Correction [Domain] Consolidation Reclassification [Member] Consolidation Reclassification [Member] Consolidation Reclassification [Member] Capital Units by Class [Axis] Capital Units by Class [Axis] Capital Unit, Class [Domain] Capital Unit, Class [Domain] Capital Unit, Class A Capital Unit, Class A [Member] Manning & Napier Group Holding, LLC Manning And Napier Group Holding Llc [Member] Manning and Napier Group Holding Llc. Class A Units Class A Units [Member] Class A Units [Member] Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] Number of Common Units Available for Conversion Number of Common Units Available for Conversion Number of Common Units Available for Conversion Payments to Acquire Interest in Subsidiaries and Affiliates Payments to Acquire Interest in Subsidiaries and Affiliates Percentage of economic interest in Manning & Napier Group held by Manning & Napier, Inc (percent) Noncontrolling Interest, Ownership Percentage by Parent Limited Liability Company LLC or Limited Partnership LP Remaining Ownership Interest Limited Liability Company LLC or Limited Partnership LP Remaining Ownership Interest Limited Liability Company LLC or Limited Partnership LP Remaining Ownership Interest Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests, Shares Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests, Shares Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests, Shares Decrease from distributions to noncontrolling interest holders Noncontrolling interests Stockholders' Equity Attributable to Noncontrolling Interest Offsetting Liabilities [Table] Offsetting Liabilities [Table] Derivative, by Nature [Axis] Derivative, by Nature [Axis] Derivative, Name [Domain] Derivative, Name [Domain] Future Future [Member] Offsetting Liabilities [Line Items] Offsetting Liabilities [Line Items] Gross Amounts of Recognized Liabilities Derivative Liability, Fair Value, Gross Liability Gross Amounts Offset in the Statement of Financial Position Derivative Liability, Fair Value, Gross Asset Net Amounts of Assets Presented in the Statement of Financial Position Derivative Liability, Fair Value, Amount Not Offset Against Collateral Financial Instruments Derivative, Collateral, Right to Reclaim Securities Cash Collateral Pledged Derivative, Collateral, Right to Reclaim Cash Net Amount Derivative Liability, Fair Value, Amount Offset Against Collateral Current Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Federal Current Federal Tax Expense (Benefit) State and local Current State and Local Tax Expense (Benefit) Current tax expense Current Income Tax Expense (Benefit) Deferred Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Federal Deferred Federal Income Tax Expense (Benefit) State and local Deferred State and Local Income Tax Expense (Benefit) Deferred tax expense (benefit) Deferred Income Tax Expense (Benefit) Provision for income taxes Earnings Per Share [Abstract] Calculation of Basic and Diluted Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Amount computed using the statutory rate Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount State and local taxes, including settlements and adjustments, net of federal benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Impact of enacted tax law changes Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount Net adjustment to deferred tax asset Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Equity-based compensation Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Amount Benefit from the flow-through entities Income Tax Reconciliation, Rate (Benefit) Provision from Flow-Through Entities Income Tax Reconciliation, Rate (Benefit) Provision from Flow-Through Entities Other, net Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Income Taxes Income Tax Disclosure [Text Block] Recognized net unrealized gain (losses) on trading securities Trading Securities, Change in Unrealized Holding Gain (Loss) Restricted Securities Available-for-sale Securities, Restricted Other than temporary impairment losses recognized Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Securities Gross realized investment gains Investment Securities, Gross Realized Gains Investment Securities, Gross Realized Gains Gross realized investment losses Investment Securities, Gross Realized Losses Investment Securities, Gross Realized Losses Net realized (losses) gains Realized Investment Gains (Losses) Components of the provision for income taxes Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Differences between income taxes computed using the U.S. federal income tax rate and the provision for income taxes for continuing operations Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Schedule of deferred tax assets and liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Summary of Income Tax Contingencies Summary of Income Tax Contingencies [Table Text Block] Equity [Abstract] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] William Manning Majority Shareholder [Member] Class of Stock [Line Items] Class of Stock [Line Items] Common stock, shares authorized (shares) Common stock, par value (dollars per share) Preferred stock, shares authorized Preferred Stock, Shares Authorized Preferred stock, par value (dollars per share) Preferred Stock, Par or Stated Value Per Share Common stock, stock voting conversion ratio (percent) Common Stock, Stock Voting Conversion Ratio Common Stock, Stock Voting Conversion Ratio Common stock, cancellation requirements, minimum ownership percentage Common Stock, Cancellation Requirements, Minimum Ownership Percentage Common Stock, Cancellation Requirements, Minimum Ownership Percentage Number of Class A common stock shares upon conversion of Class A Units (shares) Number of Class A Common Stock Shares Upon Conversion of Outstanding Class A Units Number of Class A Common Stock Shares Upon Conversion of Outstanding Class A Units Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Conversion of Stock, Eligible for Exchange Conversion of Stock, Number of Shares Eligible for Exchange Conversion of Stock, Number of Shares Eligible for Exchange Document Documentand Entity Information [Abstract] Document Documentand Entity Information [Abstract] Document Information [Table] Document Information [Table] Entity Information [Line Items] Entity Information [Line Items] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key 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 Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Entity Public Float Entity Public Float Related Party Information [Table] Schedule of Related Party Transactions, by Related Party [Table] Counterparty Name [Axis] Counterparty Name [Axis] Counterparty Name [Domain] Counterparty Name [Domain] Manning & Napier Fund, Inc., and Rainier Investment Management Mutual Funds [Member] Manning & Napier Fund, Inc., and Rainier Investment Management Mutual Funds [Member] Manning & Napier Fund, Inc., and Rainier Investment Management Mutual Funds [Member] Exeter Trust Company Collective Investment Trust [Member] Exeter Trust Company Collective Investment Trust [Member] Exeter Trust Company Collective Investment Trust [Member] Executive Officer Executive Officer [Member] Affiliated entity Affiliated Entity [Member] Affiliated Mutual Funds and Collective Trusts [Member] Affiliated Mutual Funds and Collective Trusts [Member] Affiliated Mutual Funds and Collective Trusts [Member] Related Party Transactions [Line Items] Related Party Transaction [Line Items] Investment Advisory Fees Investment Advisory Fees Revenue from Related Parties Revenue from Related Parties Advisory Fees Waived Advisory Fees Waived Advisory Fees Waived Accounts receivable—affiliated mutual funds Due from Affiliate, Current Schedule of Goodwill Schedule of Goodwill [Table Text Block] Schedule of Finite-Lived Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Schedule of Indefinite-Lived Intangible Assets Schedule of Indefinite-Lived Intangible Assets [Table Text Block] Schedule of Finite-Lived Intangible Assets, Future Amortization Expense Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Deferred tax assets Components of Deferred Tax Assets [Abstract] Tax receivable agreement Deferred Tax Assets, Tax Receivable Agreement Deferred Tax Assets, Tax Receivable Agreement Bonus and commissions Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Bonuses and Commissions Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Bonuses and Commissions Consulting and professional Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Consulting and Professional Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Consulting and Professional Other Deferred Tax Assets, Other Total Deferred Tax Assets, Gross Deferred Tax Assets, Gross Deferred tax liabilities Components of Deferred Tax Liabilities [Abstract] Depreciation and amortization Deferred Tax Liabilities, Deferred Expense, Depreciation and Amortization Deferred Tax Liabilities, Deferred Expense, Depreciation and Amortization Prepaid items Deferred Tax Liabilities, Prepaid Expenses Total Deferred Tax Liabilities Deferred Tax Liabilities, Gross Net deferred tax assets Deferred Tax Assets, Net Accounts Payable and Accrued Liabilities [Abstract] Accrued expenses and other liabilities Schedule of Accrued Liabilities [Table Text Block] Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Equity-based compensation Depreciation and amortization Depreciation, Depletion and Amortization Change in contingent consideration liability Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability Impairment losses Asset Impairment Charges Net (gains) losses on investment securities Gain (Loss) on Investments Deferred income taxes Amortization of debt issuance costs Amortization of Financing Costs (Increase) decrease in operating assets and increase (decrease) in operating liabilities: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable Increase (Decrease) in Accounts Receivable Accounts receivable—affiliated mutual funds Increase (Decrease) in Due from Affiliates, Current Due from broker - consolidated funds Increase (Decrease) in Receivables from Brokers-Dealers and Clearing Organizations Investment securities - consolidated funds Increase (Decrease) in Trading Securities Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Accounts payable Increase (Decrease) in Accounts Payable Accrued expenses and other liabilities Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities Deferred revenue Increase (Decrease) in Deferred Revenue Other long-term liabilities Increase (Decrease) in Other Noncurrent Liabilities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Purchase of property and equipment Payments to Acquire Property, Plant, and Equipment Sale of investments Proceeds from Sale, Maturity and Collection of Investments Purchase of investments Payments to Acquire Investments Due from broker Increase (Decrease) in Broker-Dealer Related Receivables (Payables), Net Acquisitions, net of cash received Payments to Acquire Businesses, Net of Cash Acquired Proceeds from maturity of investments Proceeds from Maturities, Prepayments and Calls of Available-for-sale Securities Net cash (used in) provided by investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Distributions to noncontrolling interests Payments of Capital Distribution Dividends paid on Class A common stock Payments of Ordinary Dividends, Common Stock Payment of shares withheld to satisfy withholding requirements Payments Related to Tax Withholding for Share-based Compensation Payment of capital lease obligations Repayments of Long-term Capital Lease Obligations Purchase of Class A units of Manning & Napier Group, LLC Payment of debt issuance costs Payments of Debt Issuance Costs Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Net decrease in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents: Cash and Cash Equivalents, at Carrying Value [Abstract] Beginning of period Cash and Cash Equivalents, at Carrying Value End of period Supplemental disclosures: Supplemental Cash Flow Information [Abstract] Cash paid during the period for interest Interest Paid Cash paid during the period for taxes, net of refunds Income Taxes Paid Non-cash investing and financing activities: Other Noncash Investing and Financing Items [Abstract] Capital expenditures in accounts payable and accruals Capital Expenditures Incurred but Not yet Paid Equipment acquired through capital lease obligation Capital Lease Obligations Incurred Accrued dividends Accrued Dividends Accrued Dividends Reconciliation from Income Before Provision for Income Taxes to Net Income Attributable to Manning & Napier, Inc. Noncontrolling Interest [Table Text Block] Noncontrolling interest. Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Table Text Block] Accounting Policies [Abstract] Basis Of Presentation And Summary Of Significant Accounting Policies [Table] Basis Of Presentation And Summary Of Significant Accounting Policies [Table] Basis Of Presentation And Summary Of Significant Accounting Policies [Table] Correction of Presentation of Investment Management Services Revenue and Certain Expenses [Member] Correction of Presentation of Investment Management Services Revenue and Certain Expenses [Member] Correction of Presentation of Investment Management Services Revenue and Certain Expenses [Member] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Scenario, Previously Reported [Member] Scenario, Previously Reported [Member] Restatement Adjustment [Member] Restatement Adjustment [Member] 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] Change in Presentation of Goodwill [Member] Change in Presentation of Goodwill [Member] Change in Presentation of Goodwill [Member] Managed Mutual Funds and Managed Mutual Consolidated Funds [Member] Managed Mutual Funds and Managed Mutual Consolidated Funds [Member] Managed Mutual Funds and Managed Mutual Consolidated Funds [Member] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Computer software Computer Software, Intangible Asset [Member] Office equipment Office Equipment [Member] Furniture and fixtures Furniture and Fixtures [Member] Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] Investment management services revenue, net Other long-term assets Other Assets, Noncurrent Deferred Tax Assets, Net, Current Number of segments Number of Operating Segments Incentive payments Fees and Commissions Investments in the funds Property and Equipment useful lives (years) Property, Plant and Equipment, Useful Life Goodwill impairment loss Impairment of Intangible Assets (Excluding Goodwill) Goodwill Distribution, servicing and custody expenses Noninterest Expense Distribution and Servicing Fees Derivative Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Noncontrolling Interest, Shared Held by Parent [Roll Forward] Noncontrolling Interest, Shared Held by Parent [Roll Forward] Noncontrolling Interest, Shared Held by Parent [Roll Forward] Noncontrolling Interest, Shares Held by Parent Noncontrolling Interest, Shares Held by Parent Noncontrolling Interest, Shares Held by Parent Noncontrolling Interest, Shares Held by Parent, Issued Noncontrolling Interest, Shares Held by Parent, Issued Noncontrolling Interest, Shares Held by Parent, Issued Noncontrolling Interest, Shares Held by Parent, Exchanged Noncontrolling Interest, Shares Held by Parent, Exchanged Noncontrolling Interest, Shares Held by Parent, Exchanged Noncontrolling Interest, Shares Held by Parent Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners [Roll Forward] Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners [Roll Forward] Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners [Roll Forward] Noncontrolling Interest, Shared Held by Noncontrolling Owners Noncontrolling Interest, Shared Held by Noncontrolling Owners Noncontrolling Interest, Shared Held by Noncontrolling Owners Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests, Shares Noncontrolling Interest, Shared Held by Noncontrolling Owners Noncontrolling Interest, Shares Total [Roll Forward] Noncontrolling Interest, Shares Total [Roll Forward] Noncontrolling Interest, Shares Total [Roll Forward] Noncontrolling Interest, Shares, Total Noncontrolling Interest, Shares, Total Noncontrolling Interest, Shares, Total Noncontrolling Interest, Shares Total, Issued Noncontrolling Interest, Shares Total, Issued Noncontrolling Interest, Shares Total, Issued Noncontrolling Interest, Shares Total, Exchanged Noncontrolling Interest, Shares Total, Exchanged Noncontrolling Interest, Shares Total, Exchanged Noncontrolling Interest, Shares, Total Noncontrolling Interest, Ownership Percentage [Roll Forward] Noncontrolling Interest, Ownership Percentage [Roll Forward] Noncontrolling Interest, Ownership Percentage [Roll Forward] Noncontrolling Interest, Ownership Percentage by Parent Noncontrolling Interest, Ownership Percentage by Parent, Issued Noncontrolling Interest, Ownership Percentage by Parent, Issued Noncontrolling Interest, Ownership Percentage by Parent, Issued Noncontrolling Interest, Ownership Percentage by Parent, Exchanged Noncontrolling Interest, Ownership Percentage by Parent, Exchanged Noncontrolling Interest, Ownership Percentage by Parent, Exchanged Noncontrolling Interest, Ownership Percentage by Parent Equity Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Class A common Stock of Public Investors Percentage Of Classa Common Stock Held By Public Percentage of class A common stock held by public. Class B common Stock of William Manning Percentage Of Class B Common Stock Held By Controlling Shareholder Percentage of class B common stock held by controlling shareholder. Voting Rights held by public Percentage Of Voting Rights Held By Public Percentage of voting rights held by public. Percentage of voting rights held by majority shareholder Percentage Of Voting Rights Held By Controlling Shareholder Percentage of voting rights held by controlling shareholder. Percentage of economic rights held by public Percentage Of Economic Rights Held By Public Percentage of economic rights held by public. Percentage Of Economic Rights Held By Controlling Shareholder Percentage Of Economic Rights Held By Controlling Shareholder Percentage of economic rights held by controlling shareholder. Outside ownership interest in limited liability and limited partnership companies Limited Liability Company Llc Or Limited Partnership Lp Outside Ownership Interest Limited liability company LLC or limited partnership LP outside ownership interest. Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest Majority Outside Ownership Interest in limited liability and limited partnership companies Limited Liability Company Llc Or Limited Partnership Lp Majority Outside Ownership Interest Limited liability company LLC or limited partnership LP majority outside ownership interest. Outside Voting Rights in Limited Liability Company LLC or Limited Partnership companies Limited Liability Company Llc Or Limited Partnership Lp Outside Voting Rights Limited liability company LLC or limited partnership LP outside voting rights. Managing Member or General Partner Voting Rights In Limited Liability Company LLC or Limited Partnership Limited Liability Company Llc Or Limited Partnership Lp Managing Member Or General Partner Voting Rights Limited liability company LLC or limited partnership LP managing member or general partner voting rights. Majority Outside Voting Rights in Limited Liability Company LLC or Limited Partnership companies Limited Liability Company Llc Or Limited Partnership Lp Majority Outside Voting Rights Limited liability company LLC or limited partnership LP majority outside voting rights. Outside Economic Rights in Limited Liability Company LLC or Limited Partnership companies Limited Liability Company Llc Or Limited Partnership Lp Outside Economic Rights Limited liability company LLC or limited partnership LP outside economic rights. Managing Member or General Partner Economic Rights of Limited Liability Company LLC or Limited Limited Liability Company Or Limited Partnership Managing Member Or General Partner Ownership Interest The number of units or percentage investment held by the managing member or general partner of the LLC or LP. Majority Outside Economic Rights in Limited Liability Company LLC Or Limited Partnership Companies Limited Liability Company Llc Or Limited Partnership Lp Majority Outside Economic Rights Limited liability company LLC or limited partnership LP majority outside economic rights Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) [Table] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Not Designated as Hedging Instrument Not Designated as Hedging Instrument [Member] Derivative Instrument Risk [Axis] Derivative Instrument [Axis] Derivative Contract Type [Domain] Derivative Contract [Domain] Interest Rate Contract Interest Rate Contract [Member] Index Future Contract Index Future Contract [Member] Index Future Contract [Member] Commodity Contract Commodity Contract [Member] Currency Futures Foreign Exchange Contract [Member] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Net Capital Gains (Losses) on Investments Net Capital Gains (Losses) on Investments [Member] Net Capital Gains (Losses) on Investments [Member] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Derivative, Weighted Average Volume Derivative, Weighted Average Volume Derivative, Weighted Average Volume Derivative, Gain (Loss) on Derivative, Net Derivative, Gain (Loss) on Derivative, Net Schedule of Affiliated Mutual Fund and CIT Transactions Schedule of Related Party Transactions [Table Text Block] Depreciation Depreciation Derivative [Table] Derivative [Table] Derivative [Line Items] Derivative [Line Items] Derivative, Notional Amount Derivative, Notional Amount Fair Value, Asset Derivative Fair Value, Liability Derivative Subsequent Events [Abstract] Subsequent Events Subsequent Events [Text Block] Acquisitions Business Combination Disclosure [Text Block] Commitment And Contingencies [Table] Commitment And Contingencies [Table] Commitment And Contingencies [Table] Office Facilities Office Building [Member] Commitment And Contingencies [Line Items] Commitment And Contingencies [Line Items] Commitment And Contingencies [Line Items] Operating lease rent expense Operating Leases, Rent Expense Future Minimum Operating Lease Payments Due Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] 2017 Operating Leases, Future Minimum Payments Due, Next Twelve Months 2018 Operating Leases, Future Minimum Payments, Due in Two Years 2019 Operating Leases, Future Minimum Payments, Due in Three Years 2020 Operating Leases, Future Minimum Payments, Due in Four Years 2021 Operating Leases, Future Minimum Payments, Due in Five Years Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Total operating leases, future minimum payments due Operating Leases, Future Minimum Payments Due Sublease income Operating Leases, Income Statement, Sublease Revenue Capital lease obligations Capital Lease Obligations Hierarchy of Inputs Used to Derive the Fair Value of Company's Assets Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Fair Value Measurements Fair Value Disclosures [Text Block] Earnings per Common Share Earnings Per Share [Text Block] Selected Quarterly Financial Data (Unaudited) Quarterly Financial Information [Text Block] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] Mutual Fund and Collective Trust Contracts Acquired [Member] Mutual Fund and Collective Trust Contracts Acquired [Member] Mutual Fund and Collective Trust Contracts Acquired [Member] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Customer Relationships for Separately Managed Accounts [Member] Customer Relationships for Separately Managed Accounts [Member] Customer Relationships for Separately Managed Accounts [Member] Trademarks [Member] Trademarks [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets, Gross Finite-Lived Intangible Assets, Gross Finite-Lived Intangible Assets, Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Impairment of Intangible Assets, Finite-lived Impairment of Intangible Assets, Finite-lived Indefinite-lived Intangible Assets, Gross Indefinite-lived Intangible Assets, Gross Indefinite-lived Intangible Assets, Gross Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) Indefinite-Lived Intangible Assets (Excluding Goodwill) Indefinite-Lived Intangible Assets (Excluding Goodwill) Intangible Assets, Gross (Excluding Goodwill) Intangible Assets, Gross (Excluding Goodwill) Impairment of Intangible Assets (Excluding Goodwill) Intangible Assets, Net (Excluding Goodwill) Intangible Assets, Net (Excluding Goodwill) Fair Value Inputs, Client Retention Factor Fair Value Inputs, Client Retention Factor Fair Value Inputs, Client Retention Factor Fair Value Inputs, Projected EBITDA Margins Fair Value Inputs, Projected EBITDA Margins Fair Value Inputs, Projected EBITDA Margins Fair Value Inputs, Long-term Revenue Growth Rate Fair Value Inputs, Long-term Revenue Growth Rate Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] December 31, 2015 Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases Redemptions/ Settlements/ Other Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements Realized and unrealized gains/(losses), net Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings December 31, 2016 Schedule of minimum rent payments relating to the office leases for subsequent years Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Balance as of January 1, Unrecognized Tax Benefits Increase related to current year tax positions Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Decrease related to prior year tax positions Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Balance as of December 31, Accrued bonuses and sales commissions Accrued Bonuses and Sales Commission Accrued Bonuses and Sales Commission Accrued payroll and benefits Employee-related Liabilities Accrued sub-transfer agent fees Accrued Sub Transfer Agent Fees Accrued sub-transfer agent fees. Dividends payable on Class A common stock Dividends Payable, Current Other accruals and liabilities Other Accruals And Liabilities Current Other accruals and liabilities current. Total accrued expenses and other liabilities Other Liabilities, Current Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Customer Relationships for Mutual Funds and Collective Investment Trusts [Member] Customer Relationships for Mutual Funds and Collective Investment Trusts [Member] Customer Relationships for Mutual Funds and Collective Investment Trusts [Member] Customer Relationships [Member] Customer Relationships [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Business Acquisition, Percentage of Voting Interests Acquired Business Acquisition, Percentage of Voting Interests Acquired Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners Payments to Acquire Businesses, Gross Payments to Acquire Businesses, Gross Business Combination, Contingent Consideration, Liability, Term Business Combination, Contingent Consideration, Liability, Term Business Combination, Contingent Consideration, Liability, Term Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Intangible assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Accounts Payable and Accrued Expenses Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Accounts Payable and Accrued Expenses Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Accounts Payable and Accrued Expenses Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Fair Value Inputs, Growth Rates Earn-out Period Fair Value Inputs, Growth Rates Earn-out Period Fair Value Inputs, Growth Rates Earn-out Period Fair Value Inputs, Discount Rate Fair Value Inputs, Discount Rate Fair value Inputs, Market Price of Risk Fair value Inputs, Market Price of Risk Fair value Inputs, Market Price of Risk Noncontrolling Interest, Ownership Percentage by Parent Noncontrolling Interest, Ownership Service-based Vesting Period Noncontrolling Interest, Ownership Service-based Vesting Period Noncontrolling Interest, Ownership Service-based Vesting Period Business Combination, Number of Quarters Financial Results in Ownership Repurchase Condition Business Combination, Number of Quarters Financial Results in Ownership Repurchase Condition Business Combination, Number of Quarters Financial Results in Ownership Repurchase Condition Business Combination, Repurchase of Acquiree's Noncontrolling Ownership, Amount Business Combination, Repurchase of Acquiree's Noncontrolling Ownership, Amount Business Combination, Repurchase of Acquiree's Noncontrolling Ownership, Amount Schedule of Share-based Compensation, Equity Award Activity [Table Text Block] Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Leasehold improvements [Member] Leasehold Improvements [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Property and equipment, gross Property, Plant and Equipment, Gross Less: Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property and equipment, net Property, Plant and Equipment, Net Property and Equipment Property, Plant and Equipment Disclosure [Text Block] Assets Assets [Abstract] Cash and cash equivalents Accounts receivable Accounts Receivable, Net, Current Due from broker Due from Correspondent Brokers Due from broker - consolidated funds Due from Correspondent Brokers, Consolidated Funds, Current Due from Correspondent Brokers, Consolidated Funds, Current Investment securities Marketable Securities, Current Investment securities - consolidated funds Marketable Securities, Consolidated Funds, Current Marketable Securities, Consolidated Funds, Current Prepaid expenses and other assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Property and equipment, net Net deferred tax assets, non-current Deferred Tax Assets, Net of Valuation Allowance, Noncurrent Total assets Assets Liabilities Liabilities [Abstract] Accounts payable Accounts Payable, Current Accrued expenses and other liabilities Deferred revenue Deferred Revenue, Current Total current liabilities Liabilities, Current Other long-term liabilities Other Liabilities, Noncurrent Amounts payable under tax receivable agreement, non-current Amounts Payable under Tax Receivable Agreement Amounts payable under tax receivable agreement (TRA), noncurrent portion. Total liabilities Liabilities Commitments and contingencies Commitments and Contingencies Shareholders’ equity Stockholders' Equity Attributable to Parent [Abstract] Common Stock Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital, Common Stock Retained deficit Retained Earnings (Accumulated Deficit) Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Total shareholders’ equity Stockholders' Equity Attributable to Parent Total shareholders’ equity and noncontrolling interests Total liabilities, shareholders’ equity and noncontrolling interests Liabilities and Equity Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Revision of Previously Reported Consolidated Statements of Operations Reclassification, Policy [Policy Text Block] Principles of Consolidation Consolidation, Policy [Policy Text Block] Operating Segments Operating Segments [Policy Text Block] Disclosure that the company operates in one operating segment. Revenue Revenue Recognition, Policy [Policy Text Block] Advisory Agreements Management and Investment Advisory Fees, Policy [Policy Text Block] Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Investment Securities Investment, Policy [Policy Text Block] Accounts Receivable Receivables, Policy [Policy Text Block] Property and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Goodwill Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Intangible Assets Goodwill and Intangible Assets, Intangible Assets, Policy [Policy Text Block] Leases Lease, Policy [Policy Text Block] Equity-Based Compensation Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Income Taxes Income Tax, Policy [Policy Text Block] Comprehensive Income (Loss) Comprehensive Income, Policy [Policy Text Block] Loss Contingencies Commitments and Contingencies, Policy [Policy Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Income Statement [Abstract] Revenues Revenues [Abstract] Expenses Costs and Expenses [Abstract] Compensation and related costs Labor and Related Expense Other operating costs Other Cost and Expense, Operating Total operating expenses Operating Expenses Operating income Non-operating income (loss) Nonoperating Income (Expense) [Abstract] Interest expense Interest Expense Interest and dividend income Investment Income, Interest and Dividend Change in liability under tax receivable agreement Net gains (losses) on investments Total non-operating income (loss) Nonoperating Income (Expense) Net income attributable to controlling and noncontrolling interests Less: net income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Net income per share available to Class A common stock Basic (dollars per share) Earnings Per Share, Basic Earnings Per Share, Diluted Weighted average shares of Class A common stock outstanding Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Summary of Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Earnings Per Share [Table] Earnings Per Share [Table] Earnings Per Share [Table] Earnings Per Share [Line Items] Earnings Per Share [Line Items] Earnings Per Share [Line Items] Less: allocation to participating securities Preferred Stock Dividends and Other Adjustments Net income available to Class A common stock Net Income (Loss) Available to Common Stockholders, Basic Weighted average shares of Class A common stock outstanding - basic Dilutive effect from unvested equity awards Weighted Average Number Diluted Shares Outstanding Adjustment Weighted average shares of Class A common stock outstanding - diluted Net income available to Class A common stock per share - basic Schedule of Reclassifications and Prior Period Adjustments [Table Text Block] Schedule of Error Corrections and Prior Period Adjustments [Table Text Block] Summary of quarterly results of operations Schedule of Quarterly Financial Information [Table Text Block] Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Dividends Payable Dividends Payable Amount approved for distribution to members of Manning & Napier Group Conversion ratio Stockholders' Equity Note, Stock Split, Conversion Ratio Noncontrolling Interests Noncontrolling Interest Disclosure [Text Block] Investment Securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Accrued Expenses and Other Liabilities Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] Goodwill and Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Shareholders’ Equity and Capital Structure Stockholders' Equity Note Disclosure [Text Block]