Derivative Instruments and Hedging Activities Disclosure [Abstract] Offsetting Liabilities [Table] Offsetting Liabilities [Table] Derivative, by Nature [Axis] Derivative, by Nature [Axis] Derivative, Name [Domain] Derivative, Name [Domain] Future Future [Member] Derivative Instrument Risk [Axis] Derivative Instrument [Axis] Derivative Contract Type [Domain] Derivative Contract [Domain] Interest Rate Contract Interest Rate Contract [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 (Liabilities) 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 Received (Pledged) Derivative, Collateral, Right to Reclaim Cash Net Amount Derivative Liability, Fair Value, Amount Offset Against Collateral Share-based Compensation [Abstract] Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] Summarized Reorganization-Related Service-Based Stock Units Schedule of Reorganization Related Service Based Stock Units [Table Text Block] Schedule of reorganization related service based stock units. Schedule of Reorganization Related Performance Based Stock Units Schedule of Reorganization Related Performance Based Stock Units [Table Text Block] Schedule of reorganization related performance based stock units. Fair Value Disclosures [Abstract] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] 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] Managed Mutual Funds Managed Mutual Funds [Member] Managed mutual funds. U.S. Treasury Notes Us Treasury Notes [Member] Us Treasury Notes [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 Derivative Asset Total assets at fair value Investments, Fair Value Disclosure Securities sold, not yet purchased Investment Sold, Not yet Purchased, at Fair Value Derivatives Derivative Liability Total liabilities at fair value Financial and Nonfinancial Liabilities, Fair Value Disclosure 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] 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. Investment Type [Axis] Investment Type [Axis] Investment Type Categorization [Domain] Investments [Domain] Manning & Napier Fund Manning & Napier Fund [Member] Manning & Napier Fund [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] Percentage of economic interest in Manning & Napier Group held by Manning & Napier, Inc (percent) Noncontrolling Interest, Ownership Percentage by Parent Number of segments Number of Operating Segments Trading Securities, Fair Value Fees earned for advisory related services provided to the Fund and CIT investment vehicles Investment Advisory Fees Noncontrolling Interest [Abstract] Noncontrolling Interest [Table] Noncontrolling Interest [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] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Manning And Napier Group Holding LLC Manning And Napier Group Holding Llc [Member] Manning and Napier Group Holding Llc. Noncontrolling Interest [Line Items] Noncontrolling Interest [Line Items] Percentage of economic interest in Manning & Napier Group held by MN Group Holdings, MNCC and the other members of Manning & Napier Group (percent) Limited Liability Company LLC or Limited Partnership LP Remaining Ownership Interest Limited Liability Company LLC or Limited Partnership LP Remaining Ownership Interest Purchase of Class A units of Manning & Napier Group, LLC held by noncontrolling interests, shares Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests, Shares Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests, Shares Conversion of stock, shares issued Conversion of Stock, Shares Issued Payments to acquire additional interest in subsidiaries Payments to Acquire Additional Interest in Subsidiaries Noncontrolling interest, decrease from redemptions or purchase of interests, remaining shares Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests, Remaining Shares Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests, Remaining Shares Payments for TRA Payments for Tax Receivable Agreement Payments for Tax Receivable Agreement Deferred tax assets, tax receivable agreements Deferred Tax Assets, Tax Receivable Agreements Deferred Tax Assets, Tax Receivable Agreements Number of common units available for conversion Number of Common Units Available for Conversion Number of Common Units Available for Conversion Distributions Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders 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). Accounts Payable and Accrued Liabilities [Abstract] Accrued bonus 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 Dividends Payable, Current Securities sold, not yet purchased Other accruals and liabilities Other Accruals And Liabilities Current Other accruals and liabilities current. Accrued expenses and other liabilities Other Liabilities, Current Subsequent Events [Abstract] Subsequent Event [Table] Subsequent Event [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Non Controlling Interest Noncontrolling Interest [Member] 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] Amount approved for distribution to members of Manning & Napier Group Dividends Payable Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Per share dividend declared to the holders of Class A common stock Common Stock, Dividends, Per Share, Declared Related Party Transactions [Abstract] Related Party Transactions Related Party Transactions Disclosure [Text Block] Fair Value Measurements Fair Value Disclosures [Text Block] Business Combinations [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Xenon LLC Xenon LLC [Member] Xenon LLC [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Intangible assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Goodwill Goodwill Reconciliation from Income Before Provision for Income Taxes to Net Income Attributable to Manning & Napier, Inc. Noncontrolling Interest Table Text Block Noncontrolling interest. Schedule of Changes Noncontrolling Interest Schedule of Changes Noncontrolling Interest [Table Text Block] Schedule of Changes Noncontrolling Interest [Table Text Block] Acquisitions Business Combination Disclosure [Text Block] Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Statement [Line Items] Statement [Line Items] Cash dividends declared per share of Class A common stock Noncontrolling Interests Noncontrolling Interest Disclosure [Text Block] Investments [Abstract] Recognized net unrealized gains 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 Equity Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving Credit Facility Revolving Credit Facility [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] LIBOR London Interbank Offered Rate (LIBOR) [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Interest rate description Line of Credit Facility, Interest Rate Description Revolving line of credit, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Basis spread on variable rate (percent) Debt Instrument, Basis Spread on Variable Rate Default interest rate, spread above stated interest rate (percent) Default Interest Rate, Spread Above Stated Interest Rate Default Interest Rate, Spread Above Stated Interest Rate Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Axis] Award Type [Domain] Equity Award [Domain] Service Based Stock Unit Service Based Stock Unit [Member] Service based stock unit. Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] 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 Granted (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Vested (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Forfeited (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period 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 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 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) Income before provision for income taxes Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Less: gain (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: gain (loss) 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 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) Income Statement [Abstract] Revenues Revenues [Abstract] Investment management services revenue Sales Revenue, Services, Net Expenses Costs and Expenses [Abstract] Compensation and related costs Labor and Related Expense Distribution, servicing and custody expenses Distribution, Servicing and Custody Expenses Distribution, Servicing and Custody Expenses Other operating costs Other Cost and Expense, Operating Total operating expenses Operating Expenses Operating income Operating Income (Loss) 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 Gain (Loss) on Investments Total non-operating income (loss) Nonoperating Income (Expense) Net income attributable to controlling and noncontrolling interests Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Less: net income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Net income per share available to Class A common stock Earnings Per Share [Abstract] Basic (in dollars per share) Earnings Per Share, Basic Diluted (in dollars per share) 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 Subsequent Events Subsequent Events [Text Block] Company's Investment Securities Holdings Investment Holdings, Schedule of Investments [Table Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization and Nature of the Business Nature of Operations [Text Block] Investment advisory fees waived Investment advisory fees waived Fees waived for providing investment management services to employees and other related parties. Common Stock Common Stock [Member] Additional Paid in Capital Additional Paid-in Capital [Member] Retained Deficit Retained Earnings [Member] Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss) [Member] Class B common stock Common Class B [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Beginning balance, Shares Shares, Outstanding Net income Distributions to noncontrolling interests 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 Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Common stock issued under equity compensation plan (shares) Stock Issued During Period, Shares, 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 - $0.32 per share Dividends, Common Stock, Cash Purchase of Class A units of Manning & Napier Group, LLC held by noncontrolling interests (Note 4) Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Ending balance Ending balance, Shares Income Tax Disclosure [Abstract] Earnings from continuing operations before income taxes Effective Tax Rate (percent) Effective Income Tax Rate Reconciliation, Percent Provision for income taxes Provision for income taxes @ 35% Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Difference between tax at effective vs. statutory rate Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Effective income tax rate, federal statutory income tax rate (percent) Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Investment Holdings [Table] Investment Holdings [Table] U.S. Treasury Note (0.25%, 8/31/2014) Us Treasury Notes Securities Two [Member] Us Treasury Notes Securities Two [Member] U.S. Treasury note (0.25%, 10/31/2015) Us Treasury Notes Securities Three [Member] Us Treasury Notes Securities Three [Member] Us Treasury Notes Securities (1.75%, 1/31/2014) Us Treasury Notes Securities One [Member] US treasury notes securities one. Investment Holdings [Line Items] Investment Holdings [Line Items] Percentage of Notes Interest Rate Of Notes Percentage interest on US Treasury Notes held. Cost Available-for-sale Debt Securities, Amortized Cost Basis Unrealized Gains Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale. Unrealized Losses Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale. Fair Value Total investment securities Investment Owned, at Fair Value Accrued Expenses and Other Liabilities Schedule of Accrued Liabilities [Table Text Block] 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] Critical Accounting Policies Critical Accounting Policies [Policy Text Block] Disclosure of any significant changes in critical accounting policies from those disclosed in the most recent annual report. Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Principles of Consolidation Consolidation, Policy [Policy Text Block] Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Due from broker Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Investment Securities Investment, 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] Income Tax Provision and Effective Tax Rate Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Restricted Stock Awards Restricted Stock Awards [Member] Restricted Stock Awards [Member] Vested (shares) 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] Index Contract Index Future Contract [Member] Index Future Contract [Member] Commodity Contract Commodity Contract [Member] Currency Contract 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, Gain (Loss) on Derivative, Net Derivative, Gain (Loss) on Derivative, Net Earnings per Common Share Earnings Per Share [Text Block] Statement of Financial Position [Abstract] Assets Assets [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Accounts receivable Accounts Receivable, Net, Current Accounts receivable—Manning & Napier Fund, Inc. Accounts Receivable Current Accounts receivable from Manning and Napier Fund Inc. Due from broker Due from Correspondent Brokers Investment securities, at fair value Marketable Securities, Current Prepaid expenses and other assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Property and equipment, net Property, Plant and Equipment, Net Net deferred tax assets, non-current Deferred Tax Assets, Net of Valuation Allowance, Noncurrent Other long-term assets Other Assets, 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 (Note 10) 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 Noncontrolling interests Stockholders' Equity Attributable to Noncontrolling Interest Total shareholders’ equity and noncontrolling interests Total liabilities, shareholders’ equity and noncontrolling interests Liabilities and Equity Capital Units by Class [Axis] Capital Units by Class [Axis] Capital Unit, Class [Domain] Capital Unit, Class [Domain] Class A units Capital Unit, Class A [Member] Vesting [Axis] Vesting [Axis] Vesting [Domain] Vesting [Domain] Vesting on Third Anniversary of Grant Date Share-based Compensation Award, Tranche One [Member] Share-based Compensation Award, Tranche One [Member] Vesting over Three Year Service Period Share-based Compensation Award, Tranche Two [Member] Share-based Compensation Award, Tranche Two [Member] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] 2011 Plan Equity Compensation Plan 2011 [Member] Equity Compensation Plan 2011 [Member] Restricted Stock Units (RSUs) Restricted Stock Units (RSUs) [Member] Reorganization Related Reorganization Related [Member] Reorganization related equity based compensation. Performance Shares Performance Shares [Member] Award vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Weighted average fair value of the awards granted (dollars per share) Share-based compensation expense Allocated Share-based Compensation Expense Awards vested in period, aggregate intrinsic value 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 Number Of Reorganization Performance Units Vesting Current Year Number Of Reorganization Performance Units Vesting Current Year Number of reorganization related performance units eligible to vest during the current year. Expense attributable to performance-based awards eligible to vest Allocated Share-based Compensation Expense, Net of Tax Summary of Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] 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 Derivative [Table] Derivative [Table] Derivative [Line Items] Derivative [Line Items] Notional Value Derivative, Notional Amount Asset Derivative Liability Derivative Average Volume of Derivative Activity Derivative, Weighted Average Volume Derivative, Weighted Average Volume Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustment 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 Share-based Compensation Depreciation Depreciation Net gains on investment securities Deferred income taxes Deferred Income Tax Expense (Benefit) (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—Manning & Napier Fund, Inc. Increase Decrease In Accounts Receivable Current The increase (decrease) during the period in amount receivable from Manning and Napier Fund Inc. 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 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 capital lease obligations Repayments of Long-term Capital Lease Obligations Purchase of Class A units of Manning & Napier Group, LLC Payments to Acquire Interest in Subsidiaries and Affiliates Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Net (decrease) increase 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 End of period Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Net income attributable to controlling and noncontrolling interests Net income attributable to Manning & Napier, Inc. Weighted average basic shares of Class A common stock outstanding (shares) Weighted Average Number Diluted Shares Outstanding Adjustment Weighted Average Number Diluted Shares Outstanding Adjustment Weighted average diluted shares of Class A common stock outstanding (shares) Net income available to Class A common stock per basic (dollars per share) Net income (loss) available to Class A common stock per share - diluted (dollars per share) Class A common stock excluded from computation of earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Calculation of basic and diluted earnings per share Schedule of Earnings Per Share, Basic and Diluted [Table 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 Accrued Expenses and Other Liabilities Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] Balance, beginning of period Net income attributable to noncontrolling interests Purchase of Class A units of Manning & Napier Group, LLC held by noncontrolling interests Balance, end of period Income Taxes Income Tax Disclosure [Text Block] Derivative Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] 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 Investment Securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Line of Credit Debt Disclosure [Text Block] Statement of Partners' Capital [Abstract] Net unrealized holding gain 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 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 interests 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 Schedule of Derivative Instruments Schedule of Derivative Instruments [Table Text Block] Schedules of Derivative Gains and Losses Derivative Instruments, Gain (Loss) [Table Text Block] Offsetting of Interest Rate Futures Offsetting Liabilities [Table Text Block] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block]