Manning & Napier (MN) 10-Q 7 May 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2015	5-May-15
Entity Information [Line Items]
Document Type	10-Q
Amendment Flag	FALSE
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Trading Symbol	MN
Entity Registrant Name	Manning & Napier, Inc.
Entity Central Index Key	1524223
Current Fiscal Year End Date	-19
Entity Filer Category	Accelerated Filer
Class A common stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		14,785,130
Class B common stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		1,000

Consolidated_Statements_of_Fin

Consolidated Statements of Financial Condition (current period unaudited) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Assets
Cash and cash equivalents	$80,377	$124,992
Accounts receivable	21,889	23,704
Accounts receivable—Manning & Napier Fund, Inc.	13,245	15,579
Due from broker	4,909	5,391
Due from broker - consolidated funds	5,032	0
Investment securities, at fair value	25,210	26,915
Prepaid expenses and other assets	7,972	9,321
Total current assets	158,634	205,902
Property and equipment, net	7,327	7,456
Net deferred tax assets, non-current	41,848	42,581
Other long-term assets	1,476	1,534
Total assets	209,285	257,473
Liabilities
Accounts payable	1,661	2,906
Accrued expenses and other liabilities	33,191	50,779
Deferred revenue	13,495	12,812
Total current liabilities	48,347	66,497
Other long-term liabilities	3,065	3,116
Amounts payable under tax receivable agreement, non-current	39,166	39,149
Total liabilities	90,578	108,762
Commitments and contingencies (Note 9)
Shareholders’ equity
Additional paid-in capital	204,975	209,284
Retained deficit	-39,972	-41,087
Accumulated other comprehensive income	-1	0
Total shareholders’ equity	165,139	168,334
Noncontrolling interests	-46,432	-19,623
Total shareholders’ equity and noncontrolling interests	118,707	148,711
Total liabilities, shareholders’ equity and noncontrolling interests	209,285	257,473
Class A common stock
Shareholders’ equity
Common stock	137	137
Class B common stock
Shareholders’ equity
Common stock	$0	$0

Consolidated_Statements_of_Fin1

Consolidated Statements of Financial Condition (current period unaudited) (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Class A common stock
Common stock, par value (dollars per share)	$0.01	$0.01
Common stock, shares authorized (shares)	300,000,000	300,000,000
Common stock, shares issued (shares)	13,713,540	13,713,540
Common stock, shares outstanding (shares)	13,713,540	13,713,540
Class B common stock
Common stock, par value (dollars per share)	$0.01	$0.01
Common stock, shares authorized (shares)	2,000	2,000
Common stock, shares issued (shares)	1,000	1,000
Common stock, shares outstanding (shares)	1,000	1,000

Consolidated_Statements_of_Ope

Consolidated Statements of Operations (unaudited) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Revenues
Investment management services revenue	$90,426	$98,470
Expenses
Compensation and related costs	26,818	51,810
Distribution, servicing and custody expenses	16,832	18,440
Other operating costs	8,942	7,937
Total operating expenses	52,592	78,187
Operating income	37,834	20,283
Non-operating income (loss)
Interest expense	-3	-3
Interest and dividend income	163	214
Change in liability under tax receivable agreement	-17	2,110
Net gains on investments	613	116
Total non-operating income (loss)	756	2,437
Income before provision for income taxes	38,590	22,720
Provision for income taxes	2,479	5,076
Net income attributable to controlling and noncontrolling interests	36,111	17,644
Less: net income attributable to noncontrolling interests	32,802	17,563
Net income attributable to Manning & Napier, Inc.	$3,309	$81
Net income per share available to Class A common stock
Basic (in dollars per share)	$0.24	$0.01
Diluted (in dollars per share)	$0.24	$0.01
Weighted average shares of Class A common stock outstanding
Basic (in shares)	13,713,540	13,634,401
Diluted (in shares)	13,914,908	13,751,690
Cash dividends declared per share of Class A common stock	$0.16	$0.16

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (unaudited) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Net income attributable to controlling and noncontrolling interests	$36,111	$17,644
Net unrealized holding loss on investment securities, net of tax	-1	0
Reclassification adjustment for realized losses on investment securities included in net income	0	1
Comprehensive income	36,110	17,645
Less: Comprehensive income attributable to noncontrolling interests	32,801	17,564
Comprehensive income attributable to Manning & Napier, Inc.	$3,309	$81

Consolidated_Statement_of_Shar

Consolidated Statement of Shareholders' Equity (unaudited) (USD $)	Total	Common Stock	Common Stock	Additional Paid in Capital	Retained Deficit	Accumulated Other Comprehensive Income (Loss)	Non Controlling Interest
In Thousands, except Share data, unless otherwise specified		Class A common stock	Class B common stock
Beginning balance at Dec. 31, 2013	$145,789	$136	$0	$208,988	($40,544)	($1)	($22,790)
Beginning balance, Shares at Dec. 31, 2013		13,634,246	1,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	17,644				81		17,563
Distributions to noncontrolling interests	-26,972						-26,972
Net changes in unrealized investment securities gains or losses	1					1
Issuance of stock for restricted stock grants		13,923
Equity-based compensation	22,684			3,165			19,519
Dividends declared on Class A common stock - $0.16 and $0.16 per share in March 31, 2015 and March 31, 2014	-2,184				-2,184
Purchase of Class A units of Manning & Napier Group, LLC held by noncontrolling interests	-30,328			-3,856			-26,472
Ending balance at Mar. 31, 2014	126,634	136	0	208,297	-42,647	0	-39,152
Ending balance, Shares at Mar. 31, 2014		13,648,169	1,000
Beginning balance at Dec. 31, 2014	148,711	137	0	209,284	-41,087	0	-19,623
Beginning balance, Shares at Dec. 31, 2014		13,713,540	1,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	36,111				3,309		32,802
Distributions to noncontrolling interests	-26,787						26,787
Net changes in unrealized investment securities gains or losses	-1					-1
Equity-based compensation	587			85			502
Dividends declared on Class A common stock - $0.16 and $0.16 per share in March 31, 2015 and March 31, 2014	-2,194				-2,194
Purchase of Class A units of Manning & Napier Group, LLC held by noncontrolling interests	-37,720			-4,394			-33,326
Ending balance at Mar. 31, 2015	$118,707	$137	$0	$204,975	($39,972)	($1)	($46,432)
Ending balance, Shares at Mar. 31, 2015		13,713,540	1,000

Consolidated_Statement_of_Shar1

Consolidated Statement of Shareholders' Equity (unaudited) (Parenthetical) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Cash dividends declared per share of Class A common stock	$0.16	$0.16
Class A common stock
Cash dividends declared per share of Class A common stock	$0.16	$0.16

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Cash flows from operating activities:
Net income	$36,111	$17,644
Adjustment to reconcile net income to net cash provided by operating activities:
Equity-based compensation	587	22,684
Depreciation and amortization	642	477
Change in amounts payable under tax receivable agreement	17	-2,110
Net gains on investment securities	-613	-116
Deferred income taxes	720	3,478
(Increase) decrease in operating assets and increase (decrease) in operating liabilities:
Accounts receivable	1,815	-222
Accounts receivable—Manning & Napier Fund, Inc.	2,334	40
Due from broker - consolidated funds	-5,000	0
Prepaid expenses and other assets	1,387	313
Accounts payable	-1,245	-173
Accrued expenses and other liabilities	-16,856	-13,682
Deferred revenue	683	1,604
Other long-term liabilities	-71	449
Net cash provided by operating activities	20,511	30,386
Cash flows from investing activities:
Purchase of property and equipment	-374	-773
Sale of investments	3,765	1,486
Purchase of investments	-1,998	-4,082
Proceeds from maturity of investments	0	100
Net cash provided by (used in) investing activities	1,393	-3,269
Cash flows from financing activities:
Distributions to noncontrolling interests	-26,787	0
Dividends paid on Class A common stock	-3,291	-3,272
Payment of shares withheld to satisfy withholding requirements	-64	0
Payment of capital lease obligations	-51	-60
Purchase of Class A units of Manning & Napier Group, LLC	-36,326	-30,328
Net cash used in financing activities	-66,519	-33,660
Net decrease in cash and cash equivalents	-44,615	-6,543
Cash and cash equivalents:
Beginning of period	124,992	125,250
End of period	$80,377	$118,707

Organization_and_Nature_of_the

Organization and Nature of the Business	3 Months Ended
	Mar. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Nature of the Business	Organization and Nature of the Business
	Manning & Napier, Inc. ("Manning & Napier", or the "Company") provides a broad range of investment solutions through separately managed accounts, mutual funds, and collective investment trusts, as well as a variety of consultative services that complement its investment process. Founded in 1970, the Company offers equity, fixed income and alternative strategies, as well as a range of blended asset portfolios, such as life cycle funds. Headquartered in Fairport, New York, the Company serves a diversified client base of high net worth individuals and institutions, including 401(k) plans, pension plans, Taft-Hartley plans, endowments and foundations.
	The Company is the sole managing member of Manning & Napier Group, LLC and its subsidiaries ("Manning & Napier Group"), a holding company for the investment management businesses conducted by its operating subsidiaries. The diagram below depicts the Company's organization structure as of March 31, 2015.
	-1	The operating subsidiaries of Manning & Napier Group include Manning & Napier Advisors, LLC ("MNA"), Exeter Advisors I, LLC, Manning & Napier Alternative Opportunities, LLC, Perspective Partners LLC, Manning & Napier Information Services, LLC, Manning & Napier Benefits, LLC, Manning & Napier Investor Services, Inc. and Exeter Trust Company.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies
	Critical Accounting Policies
	There have been no significant changes in our critical accounting policies and estimates from those that were disclosed in our Annual Report on Form 10-K for the year ended December 31, 2014.
	The Company believes that the disclosures herein are adequate so that the information presented is not misleading; however, these financial statements should be read in conjunction with the financial statements and the notes thereto in our Annual Report on Form 10-K for the year ended December 31, 2014. The financial data for the interim periods may not necessarily be indicative of results for future interim periods or for the full year.
	Basis of Presentation
	The accompanying unaudited consolidated financial statements were prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and related rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) for interim financial reporting and include all adjustments, consisting only of normal recurring adjustments which are, in the opinion of management, necessary for a fair statement of the results for the interim period.
	The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates or assumptions that affect the reported amounts and disclosures in the consolidated financial statements. Actual results could differ from these estimates or assumptions.
	Principles of Consolidation
	As of March 31, 2015, Manning & Napier holds an approximately 15.6% economic interest in Manning & Napier Group but, as managing member, controls all of the business and affairs of Manning & Napier Group. As a result, the Company consolidates the financial results of Manning & Napier Group and records a noncontrolling interest on its consolidated statements of financial condition with respect to the remaining economic interest in Manning & Napier Group held by Manning & Napier Group Holdings, LLC (“M&N Group Holdings”) and Manning & Napier Capital Company, LLC (“MNCC”).
	All material intercompany transactions have been eliminated in consolidation.
	In accordance with Accounting Standards Codification ("ASU") 2009-17, Consolidation (Topic 810) – Improvements to Financial Reporting by Enterprises Involved with Variable Interest Entities, the determination of whether a company is required to consolidate an entity is based on, among other things, an entity’s purpose and design, a company’s ability to direct the activities of the entity that most significantly impact the entity’s economic performance, and whether a company is obligated to absorb losses or receive benefits that could potentially be significant to the entity. The standard also requires ongoing assessments of whether a company is the primary beneficiary of a variable interest entity (“VIE”). In January 2010, the FASB deferred portions of ASU 2009-17 that relate to certain investment companies. The Company determined that certain entities for which it is the investment manager and/or general partner, qualify for the scope deferral and will continue to be assessed for consolidation under prior accounting guidance for consolidation of VIEs.
	The Company provides seed capital to its investment teams to develop new products and services for its clients. The original seed investment typically represents all or a majority of the equity investment in the new product. Pursuant to U.S. GAAP, the Company evaluates its seed investments on a regular basis and consolidates such investments for which it holds a controlling financial interest.
	The Company serves as the investment adviser for Manning & Napier Fund, Inc. series of mutual funds (the “Fund”) and the Exeter Trust Company Collective Investment Trusts (“CIT”). The Fund and CIT are legal entities, the business and affairs of which are managed by their respective boards of directors. As a result, each of these entities is a voting interest entity (“VOE”). While the Company holds, in limited cases, direct investments in a fund (which are made on the same terms as are available to other investors and do not represent a majority voting interest in any fund), the Company does not have a controlling financial interest or a majority voting interest and, as such, does not consolidate these entities.
	The Company is the General Partner of the MN Xenon Managed Futures Fund LP ("LP Fund"). The Company has determined that the LP Fund is not a VIE as (a) the entity has enough equity to finance its activities without additional financial support and (b) the limited partners, as a group, have the ability to remove the general partner ("kick-out rights") with a majority vote of partnership percentage. Under the voting interest model, the Company does not consolidate VOEs in which the presumption of control by the general partner is overcome by kick-out rights.
	Cash and Cash Equivalents
	The Company considers all highly liquid investments with original maturities of three months or less to be cash equivalents. Cash and cash equivalents are primarily held in operating accounts at major financial institutions and also in money market securities. Cash equivalents are stated at cost, which approximates market value due to the short-term maturity of these investments. The fair value of cash equivalents have been classified as Level 1 in accordance with the fair value hierarchy.
	Due from broker
	The Company and its consolidated funds conducts business with brokers for certain of its investment activities. The due from broker balances on the consolidated statements of financial condition represents cash held by brokers as collateral for managed futures.
	Investment Securities
	Investment securities are classified as either trading or available-for-sale and are carried at fair value. Fair value is determined based on quoted market prices in active markets for identical or similar instruments.
	Investment securities classified as trading consist of equity securities, fixed income securities, and investments in mutual funds and hedge funds for which the Company provides advisory services. Realized and unrealized gains and losses on trading securities are recorded in net gains (losses) on investments in the consolidated statements of operations. At March 31, 2015, trading securities consist solely of investments held by the Company to provide initial cash seeding for product development purposes.
	Operating Segments
	The Company operates in one segment, the investment management industry. The Company primarily provides investment management services to separately managed accounts, mutual funds and collective investment trust funds. Management assesses the financial performance of these vehicles on a combined basis.
	Revenue
	The majority of the Company’s revenues are based on fees charged to manage customers’ portfolios. Investment management fees are generally computed as a percentage of assets under management ("AUM") and recognized as earned. Fees for providing investment advisory services are computed and billed in accordance with the provisions of the applicable investment management agreements. For the Company’s separately managed accounts, clients either pay investment management fees in advance, typically for a semi-annual or quarterly period, or in arrears, typically for a monthly or quarterly period. When investment management fees are paid in advance, the Company defers the revenue and recognizes it over the applicable period. When investment management fees are paid in arrears, the Company estimates revenues based on AUM market values as of the most recent month end date, and adjusts to actual when billed. For mutual funds and collective investment trust vehicles, the Company’s fees are calculated and earned daily based on AUM.
	Certain investment advisory contracts provide for a performance-based fee, in addition to a base investment management fee, which is calculated as a percentage of cumulative profits over and above the aggregate of previous period cumulative profits. Performance-based fees are recorded as a component of revenue at the end of each contract’s measurement period, when all contingencies are resolved, typically on a quarterly basis. For the three months ended March 31, 2015, the Company recognized approximately $0.1 million in performance fee income.
	The Company has agreements with third parties who provide distribution and administrative services for its mutual funds, collective investment trusts and certain separately managed accounts. Third party agreements are evaluated against Financial Accounting Standards Board ("FASB") ASC 605-45 Revenue Recognition - Principal Agent Considerations to determine whether revenue should be reported gross or net of payments to third-party service providers. In management's judgment there are various indicators that support gross revenue reporting, the most notable being the Company acts as primary obligor and therefore principal service provider. Based on this evaluation, investment management service revenue is recorded gross of distribution and administrative fees paid to third parties.
	Advisory Agreements
	The Company derives significant revenue from its role as advisor to the Fund and the CIT.
	The Company's investments in the Fund amounted to approximately $0.2 million as of March 31, 2015 and December 31, 2014.
	Fees earned for advisory related services provided to the Fund and CIT investment vehicles were approximately $45.2 million and $52.1 million for the three months ended March 31, 2015 and 2014, respectively. These amounts represent greater than 10% of the Company's revenue in each respective period.
	Recent Accounting Pronouncements
	In February 2015, the FASB issued ASU 2015-02, Consolidation (Topic 810): Amendments to the Consolidation Analysis. The ASU modifies existing consolidation guidance for determining whether certain legal entities should be consolidated. The new guidance will be effective on January 1, 2016, and requires either a retrospective or a modified retrospective approach to adoption. Early adoption is permitted. The Company is currently evaluating the potential impact on its consolidated financial statements.
	In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606), which supersedes existing accounting standards for revenue recognition and creates a single framework. The new guidance will be effective on January 1, 2018 and requires either a retrospective or a modified retrospective approach to adoption. Early application is prohibited. The Company is currently evaluating its transition method and the potential impact on its consolidated financial statements.

Noncontrolling_Interests

Noncontrolling Interests	3 Months Ended
	Mar. 31, 2015
Noncontrolling Interest [Abstract]
Noncontrolling Interests	Noncontrolling Interests
	Manning & Napier holds an approximately 15.6% economic interest in Manning & Napier Group, but as managing member controls all of the business and affairs of Manning & Napier Group. As a result, the Company consolidates the financial results of Manning & Napier Group and records a noncontrolling interest on its consolidated statement of financial condition with respect to the remaining approximately 84.4% aggregate economic interest in Manning & Napier Group held by M&N Group Holdings and MNCC. Net income attributable to noncontrolling interests on the statements of operations represents the portion of earnings or loss attributable to the economic interest in Manning & Napier Group held by the noncontrolling interests.
	The following provides a reconciliation from “Income before provision for income taxes” to “Net income attributable to Manning & Napier, Inc.”:
			Three months ended March 31,
			2015			2014
			(in thousands)
	Income before provision for income taxes		$	38,590		$	22,720
	Less: (loss) gain before provision for income taxes of Manning & Napier, Inc. (a)		(18		)	2,105
	Income before provision for income taxes, as adjusted		38,608			20,615
	Controlling interest percentage (b)		14.5		%	14		%
	Net income attributable to controlling interest		5,614			2,876
	Plus: (loss) gain before provision for income taxes of Manning & Napier, Inc. (a)		(18		)	2,105
	Income before income taxes attributable to Manning & Napier, Inc.		5,596			4,981
	Less: provision for income taxes of Manning & Napier, Inc. (c)		2,287			4,900
	Net income attributable to Manning & Napier, Inc.		$	3,309		$	81
	________________________
	a)	Manning & Napier, Inc. incurs certain gains or expenses that are only attributable to it and are therefore excluded from the net income attributable to noncontrolling interests.
	b)	Income before provision for income taxes is allocated to the controlling interest based on the percentage of units of Manning & Napier Group held by Manning & Napier, Inc. The amount represents the Company's weighted ownership of Manning & Napier Group for the respective periods.
	c)	The consolidated provision for income taxes is equal to the sum of (i) the provision for income taxes for entities other than Manning & Napier, Inc. and (ii) the provision for income taxes of Manning & Napier, Inc. which includes all U.S. federal and state income taxes. The consolidated provision for income taxes totaled approximately $2.5 million and $5.1 million for the three months ended March 31, 2015 and 2014, respectively.
	Pursuant to the exchange agreement entered into at the time of the Company's 2011 initial public offering ("IPO"), M&N Group Holdings and MNCC exchanged a total of 3,161,502 Class A units of Manning & Napier Group on March 31, 2015 for approximately $36.3 million in cash. Subsequent to the exchange, the Class A units were retired. In addition, on March 31, 2015, the Company purchased and retired 2,516,352 unvested Class A units of Manning & Napier Group held by M&N Group Holdings and MNCC at a predetermined cost basis for approximately $1.4 million in cash. These units were subject to performance-based vesting criteria in connection with the 2011 reorganization transactions and did not vest. These acquisitions of additional operating membership interests were treated as reorganizations of entities under common control as required by ASC 805 "Business Combinations".
	As a result of the aforementioned transactions, the Company's economic ownership interest in Manning & Napier Group increased to 15.6%. As of March 31, 2015, M&N Group Holdings and MNCC may exchange an aggregate of 67,896,484 units of Manning & Napier Group for shares of the Company's Class A common stock pursuant to the terms of the exchange agreement entered into at the time of the Company's 2011 IPO.
	At March 31, 2015 and December 31, 2014, the Company had recorded a liability of $41.3 million and $41.2 million, respectively, representing the estimated payments due to the selling unit holders under the tax receivable agreement ("TRA") entered into between Manning & Napier and the holders of Manning & Group. Of these amounts, $2.1 million were included in accrued expenses and other liabilities at March 31, 2015 and December 31, 2014, respectively. The Company made no payments pursuant to the TRA during the three months ended March 31, 2015 and 2014.
	Obligations pursuant to the TRA are obligations of Manning & Napier. They do not impact the noncontrolling interests. These obligations are not income tax obligations. Furthermore, the TRA has no impact on the allocation of the provision for income taxes to the Company’s net income.
	During the three months ended March 31, 2015 and 2014, the Company distributed approximately $26.8 million and $27.0 million, respectively, to noncontrolling interests. None of these distributions are payments pursuant to the TRA.

Investment_Securities

Investment Securities	3 Months Ended
	Mar. 31, 2015
Investments [Abstract]
Investment Securities	Investment Securities
	The following represents the Company’s investment securities holdings as of March 31, 2015 and December 31, 2014:
		31-Mar-15
		Cost		Unrealized		Unrealized			Fair
				Gains		Losses			Value
		(in thousands)
	Available-for-sale securities
	U.S. Treasury notes (0.25%, 10/31/2015)	$	2,107	$	—	$	(1	)	$	2,106
	Trading securities
	Equity securities								10,215
	Fixed income securities								9,076
	Mutual funds								166
	Hedge funds								3,647
									23,104
	Total investment securities								$	25,210
		31-Dec-14
		Cost		Unrealized		Unrealized			Fair
				Gains		Losses			Value
		(in thousands)
	Available-for-sale securities
	U.S. Treasury notes (0.25%, 10/31/2015)	$	2,107	$	—	$	—		$	2,107
	Trading securities
	Equity securities								12,048
	Fixed income securities								9,366
	Mutual funds								168
	Hedge funds								3,226
									24,808
	Total investment securities								$	26,915
	Investment securities are classified as either trading or available-for-sale and are carried at fair value. Fair value is determined based on quoted market prices in active markets for identical or similar instruments.
	Investment securities classified as trading consist of equity securities, fixed income securities and investments in mutual funds and hedge funds for which the Company provides advisory services. At March 31, 2015 and December 31, 2014, trading securities consist solely of investments held by the Company to provide initial cash seeding for product development purposes. The Company recognized approximately $0.2 million and $0.5 million of net unrealized gains related to investments classified as trading during the three months ended March 31, 2015 and 2014, respectively.
	Investment securities classified as available-for-sale consist of U.S. Treasury notes for compliance with certain regulatory requirements. As of March 31, 2015 and December 31, 2014, $0.6 million of these securities is considered restricted. The Company periodically reviews each individual security position that has an unrealized loss, or impairment, to determine if that impairment is other-than-temporary. No other-than-temporary impairment charges have been recognized by the Company during the three months ended March 31, 2015 and 2014.

Derivative_Instruments

Derivative Instruments	3 Months Ended
	Mar. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	Derivative Instruments
	The Company enters into futures contracts for product development purposes. Futures are commitments either to purchase or sell a designated financial instrument, currency, commodity or an index at a specified future date for a specified price and may be settled in cash or another financial asset. Upon entering into a futures contract, the Company is required to pledge to the broker an amount of cash, which is reported in due from broker within the consolidated statements of financial condition. Futures contracts have little credit risk because the counterparties are futures exchanges. The Company does not hold any derivatives in a formal hedge relationship under ASC 815-10, Derivatives and Hedging.
	The following tables present the notional value and fair value as of March 31, 2015 and December 31, 2014 for derivative instruments not designated as hedging instruments:
			March 31, 2015
							Fair Value
			Notional Value				Asset Derivative				Liability Derivative
			(in thousands)
	Interest rate futures		$	166,119			$	306			$	(240	)
	Index futures		2,035				37				(1		)
	Commodity futures		4,168				87				(38		)
	Currency futures		10,171				1				(140		)
	Total derivatives		$	182,493			$	431			$	(419	)
			December 31, 2014
						Fair Value
			Notional Value			Asset Derivative			Liability Derivative
			(in thousands)
	Interest rate futures		106,932			162			(60	)
	Index futures		2,032			51			(16	)
	Commodity futures		3,506			41			(76	)
	Currency futures		10,017			162			(17	)
	Total derivatives		122,487			416			(169	)
	As of March 31, 2015 and December 31, 2014, the derivative assets and liabilities are measured at fair value and are included in due from broker in the consolidated statements of financial condition, with changes in the fair value reported in net gains (losses) on investments in the consolidated statements of operations. For the three months ended March 31, 2015, the average volume of derivative activity (measured in terms of notional value) was approximately $199.9 million. The following table presents the gains (losses) recognized in net gains (losses) on investments in the consolidated statements of operations for the three months ended March 31, 2015 and 2014:
		Three months ended March 31,
		2015				2014
		(in thousands)
	Interest rate futures	$	118			$	(365	)
	Index futures	71				—
	Commodity futures	20				—
	Currency futures	294				—
	Balance as of end of period	$	503			$	(365	)
	The Company discloses information about offsetting and related arrangements to enable users of its financial statements to understand the effect of those arrangements on its financial position in accordance with ASU 2011-11, Disclosures about Offsetting Assets and Liabilities. The derivatives instruments are subject to a master netting agreement allowing for the netting of assets and liabilities on the consolidated statements of financial position.
	The following table presents the offsetting of managed futures as of March 31, 2015 and December 31, 2014:
			Gross Amounts of Recognized Liabilities				Gross Amounts Offset in the Statement of Financial Position				Net Amounts of Assets (Liabilities) Presented in the Statement of Financial Position			Financial Instruments		Cash Collateral Received (Pledged)		Net Amount
			(in thousands)
	March 31, 2015		$	(419	)		$	431			$	12		$	—	$	—	$	12
	December 31, 2014		$	(169	)		$	416			$	247		$	—	$	—	$	247

Fair_Value_Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements
	Fair value is defined as the price that the Company would receive upon selling an investment in an orderly transaction to an independent buyer in the principal or most advantageous market of the investment. A fair value hierarchy is provided that gives the highest priority to unadjusted quoted prices in active markets for identical assets and liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3).
	The following three-tier fair value hierarchy prioritizes the inputs used in measuring fair value:
	•Level 1—observable inputs such as quoted prices in active markets for identical securities;
	•	Level 2—other significant observable inputs (including but not limited to quoted prices for similar securities, interest rates, prepayment rates, credit risk, etc.); and
	•	Level 3—significant unobservable inputs (including the Company’s own assumptions in determining the fair value of investments).
	The following provides the hierarchy of inputs used to derive the fair value of the Company’s financial instruments as of March 31, 2015 and December 31, 2014:
			March 31, 2015
			Level 1		Level 2		Level 3		Totals
			(in thousands)
	Equity securities		$	10,215	$	—	$	—	$	10,215
	Fixed income securities		1,100		7,976		—		9,076
	Mutual funds		166		—		—		166
	Hedge funds		—		3,647		—		3,647
	U.S. Treasury notes		—		2,106		—		2,106
	Derivatives		431		—		—		431
	Total assets at fair value		$	11,912	$	13,729	$	—	$	25,641
	Derivatives		$	419	$	—	$	—	$	419
	Total liabilities at fair value		$	419	$	—	$	—	$	419
			December 31, 2014
			Level 1		Level 2		Level 3		Totals
			(in thousands)
	Equity securities		$	12,048	$	—	$	—	$	12,048
	Fixed income securities		1,154		8,212		—		9,366
	Mutual funds		168		—		—		168
	Hedge funds		—		3,226		—		3,226
	U.S. Treasury notes		—		2,107		—		2,107
	Derivatives		416		—		—		416
	Total assets at fair value		$	13,786	$	13,545	$	—	$	27,331
	Securities sold, not yet purchased		$	964	$	—	$	—	$	964
	Derivatives		169		—		—		169
	Total liabilities at fair value		$	1,133	$	—	$	—	$	1,133
	Valuations of investments in fixed income securities and U.S. Treasury notes can generally be obtained through independent pricing services. For most bond types, the pricing service utilizes matrix pricing, which considers one or more of the following factors: yield or price of bonds of comparable quality, coupon, maturity, current cash flows, type and current day trade information, as well as dealer supplied prices. These valuations are categorized as Level 2 in the hierarchy.
	The Company relies on the net asset value of certain hedge fund investments as their fair value. The net asset values have been derived from the fair values of underlying futures contracts as of the respective reporting dates. Redemptions may occur monthly at the net asset value and are therefore categorized as Level 2 in the hierarchy.
	There were no Level 3 securities held by the Company at March 31, 2015 or December 31, 2014.
	The Company’s policy is to recognize transfers in and transfers out of the valuation levels as of the beginning of the reporting period. There were no transfers between Level 1 and Level 2 securities during the three months ended March 31, 2015.

Accrued_Expenses_and_Other_Lia

Accrued Expenses and Other Liabilities	3 Months Ended
	Mar. 31, 2015
Accounts Payable and Accrued Liabilities [Abstract]
Accrued Expenses and Other Liabilities	Accrued Expenses and Other Liabilities
	Accrued expenses and other liabilities as of March 31, 2015 and December 31, 2014 consisted of the following:
		31-Mar-15		31-Dec-14
		(in thousands)
	Accrued bonus and sales commissions	$	12,396	$	28,801
	Accrued payroll and benefits	2,545		3,424
	Accrued sub-transfer agent fees	7,801		8,108
	Dividends payable	2,194		3,291
	Amounts payable under tax receivable agreement	2,100		2,100
	Securities sold, not yet purchased	—		964
	Other accruals and liabilities	6,155		4,091
		$	33,191	$	50,779

Line_of_Credit

Line of Credit	3 Months Ended
	Mar. 31, 2015
Debt Disclosure [Abstract]
Line of Credit	Line of Credit
	On February 13, 2013, the Company and Manning & Napier Group executed a Daily Adjusting LIBOR Revolving Line Note (the "Note") with M&T Bank. The Note has an original principal amount of $10.0 million and bears an interest rate of 1.50 percentage points above the greater of (a) one-month LIBOR, adjusting daily, or (b) one-day (i.e., overnight) LIBOR. The Note is unsecured and is payable on demand. If the Company fails to make payment when due under the Note, the default rate on the outstanding balance shall be 5 percentage points per year above the otherwise applicable rate per year. The Company has not drawn any loans under the Note.

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies
	The Company may from time to time enter into agreements that contain certain representations and warranties and which provide general indemnifications. The Company may also serve as a guarantor of such obligations of one or more of the Manning & Napier Group entities. The Company’s maximum exposure under these arrangements is unknown, as this would involve future claims that may be made against the Company that have not yet occurred. The Company expects any risk of liability associated with such guarantees to be remote.
	Regulation
	As an investment adviser to a variety of investment products, the Company and its affiliated broker-dealer are subject to routine reviews and inspections by the SEC, Financial Industry Regulatory Authority, Inc., National Futures Association and U.S. Commodity Futures Trading Commission. From time to time, the Company may also be subject to claims, be involved in various legal proceedings arising in the ordinary course of its business and be subject to other contingencies. The Company does not believe that the outcome of any of these reviews, inspections or other legal proceedings will have a material impact on its consolidated financial statements; however, litigation is subject to many uncertainties, and the outcome of individual litigated matters is difficult to predict. The Company will establish accruals for matters that are probable, can be reasonably estimated, and may take into account any related insurance recoveries to the extent of such recoveries. As of March 31, 2015 and December 31, 2014, the Company has not accrued for any such claims, legal proceedings, or other contingencies.

Earnings_per_Common_Share

Earnings per Common Share	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Earnings per Common Share	Earnings per Common Share
	Basic earnings per share (“basic EPS”) is computed by dividing net income by the weighted average number of shares outstanding for the reporting period. Diluted earnings per share (“diluted EPS”) gives effect during the reporting period to other potentially dilutive shares outstanding.
	The following is a reconciliation of the income and share data used in the basic and diluted earnings per share computations for the three months ended March 31, 2015 and 2014:
		Three months ended March 31,
		2015		2014
		(in thousands, except share data)
	Net income attributable to controlling and noncontrolling interests	$	36,111	$	17,644
	Less: net income attributable to noncontrolling interests	32,802		17,563
	Net income attributable to Manning & Napier, Inc.	$	3,309	$	81
	Weighted average shares of Class A common stock outstanding - basic	13,713,540		13,634,401
	Dilutive effect from restricted stock units	201,368		117,289
	Weighted average shares of Class A common stock outstanding - diluted	13,914,908		13,751,690
	Net income available to Class A common stock per share - basic	$	0.24	$	0.01
	Net income available to Class A common stock per share - diluted	$	0.24	$	0.01
	At March 31, 2015, the Company had outstanding under its 2011 Equity Compensation Plan 181,378 restricted stock units that have a performance condition. These units were not included in the calculation of diluted earnings per common share for the three months ended March 31, 2015 because the performance conditions were not satisfied.
	At March 31, 2015 and March 31, 2014 there were 67,896,484 and 73,762,186, respectively, Class A Units of Manning & Napier Group outstanding which, subject to certain restrictions, may be exchangeable for up to 67,896,484 and 73,762,186, respectively, shares of the Company’s Class A common stock. The restrictions set forth in the exchange agreement were in place at the end of each respective reporting period. These units were not included in the calculation of diluted earnings per common share for the three months ended March 31, 2015 and 2014 because the effect would have been anti-dilutive.
	The Company’s Class B common stock represent voting interests and do not participate in the earnings of the Company. Accordingly, there is no basic or diluted EPS related to the Company’s Class B common stock.

Equity_Based_Compensation

Equity Based Compensation	3 Months Ended
	Mar. 31, 2015
Share-based Compensation [Abstract]
Equity Based Compensation	Equity Based Compensation
	The 2011 Equity Compensation Plan (the "Equity Plan") was adopted by the Company's board of directors and approved by the Company's stockholders prior to the consummation of the IPO. A total of 13,142,813 equity interests are authorized for issuance. The equity interests may be issued in the form of the Company's Class A common stock, restricted stock units, units of Manning & Napier Group, or certain classes of membership interests in the Company which may convert into units of Manning & Napier Group.
	The following table summarizes stock award activity for the three months ended March 31, 2015 under the Company's Equity Plan:
		Restricted		Weighted Average Grant Date Fair Value
		Stock Awards
	Stock awards outstanding at January 1, 2015	855,009		$	15.32
	Granted	—		$	—
	Vested	—		$	—
	Forfeited	(12,780	)	$	15.6
	Stock awards outstanding at March 31, 2015	842,229		$	15.31
	There were no awards granted during the three months ended March 31, 2015. The weighted average grant date fair value of Equity Plan awards granted during the three months ended March 31, 2014 was $16.16, based on the closing sale price of Manning & Napier Inc.'s Class A common stock as reported on the New York Stock Exchange on the date of grant, and reduced by the present value of the dividends expected to be paid on the underlying shares during the requisite service period. For such awards that vest over time, recipients are not entitled to dividends declared on the underlying shares of Class A common stock until the awards vest.
	For the three months ended March 31, 2015 and 2014, the Company recorded approximately $0.6 million and $0.8 million, respectively, of compensation expense related to awards under the Equity Plan. For the three-months ended March 31, 2014, the Company recognized approximately $21.9 million of compensation expense related to the vesting terms of ownership interests in connection with the 2011 reorganization transactions.
	As of March 31, 2015, there was unrecognized compensation expense related to Equity Plan awards of approximately $5.2 million, which the Company expects to recognize over a weighted average period of approximately 1.7 years.

Income_Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes
	The Company is comprised of entities that have elected to be treated as either a limited liability company ("LLC") or a “C-Corporation". As such, the entities functioning as LLC’s are not liable for or able to benefit from U.S. federal and most state income taxes on their earnings, and earnings (losses) will be included in the personal income tax returns of each entity’s unit holders. The entities functioning as C-Corporations are liable for or able to benefit from U.S. federal and state and local income taxes on their earnings and losses, respectively.
	The Company’s income tax provision and effective tax rate were as follows:
		Three months ended March 31,
		2015			2014
		(in thousands)
	Earnings from continuing operations before income taxes	$	38,590		$	22,720
	Effective tax rate	6.4		%	22.3		%
	Provision for income taxes	2,479			5,076
	Provision for income taxes @ 35%	13,507			7,952
	Difference between tax at effective vs. statutory rate	$	(11,028	)	$	(2,876	)
	For the three months ended March 31, 2015 and 2014, the difference between the Company’s recorded provision and the provision that would result from applying the U.S. statutory rate of 35% is primarily attributable to the benefit resulting from the fact that a significant portion of the Company’s operations include a series of flow-through entities which are generally not subject to federal and most state income taxes. Accordingly, a portion of the Company’s earnings are not subject to corporate level taxes. For the three months ended March 31, 2014, the benefit is partially offset by a $2.2 million impact from enacted changes in tax laws that lowered the Company's expectation of the future tax benefits under the tax receivable agreement.

Related_Party_Transactions

Related Party Transactions	3 Months Ended
	Mar. 31, 2015
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions
	Transactions with noncontrolling members
	From time to time, the Company may be asked to provide certain services, including accounting, legal and other administrative functions for the noncontrolling members of Manning & Napier Group. While immaterial, the Company has not received any reimbursement for such services.
	The Company manages the personal funds of certain of the Company's executive officers, including William Manning. Pursuant to the respective investment management agreements, in some instances the Company waives or reduces its regular advisory fees for these accounts and personal funds utilized to incubate products. The aggregate value of the fees waived for the three months ended March 31, 2015 related to the Company's executive officers was less than $0.1 million.
	Affiliate transactions - Manning & Napier Fund, Inc.
	The Company has agreements to serve as the investment manager of Manning & Napier Fund, Inc., with which certain of its officers are affiliated. Under the terms of these agreements, which are generally reviewed and continued by the board of directors of Manning & Napier Fund, Inc. annually, the Company receives a fee based on an annual percentage of the average daily net assets of each series within the Manning & Napier Fund, Inc. The Company has contractually agreed to limit its fees and reimburse expenses to limit operating expenses incurred by certain of Manning & Napier Fund, Inc. series.

Subsequent_Events

Subsequent Events	3 Months Ended
	Mar. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events
	Distributions and dividends
	On May 6, 2015, the Board of Directors approved a distribution from Manning & Napier Group to Manning & Napier and the noncontrolling interests of Manning & Napier Group. The amount of the distribution to the members of Manning & Napier Group is approximately $31.3 million, of which approximately $26.2 million is expected to be payable to the noncontrolling interests. Concurrently, the Board of Directors declared a $0.16 per share dividend to the holders of Class A common stock. The dividend is payable on or about August 3, 2015 to shareholders of record as of July 15, 2015.
	Issuance of Class A common stock
	On April 16, 2015, the Company granted approximately 1.1 million of Class A common stock under the Equity Plan, the majority of which is granted to certain of its employees that will vest over a six-year service period. As a result of the aforementioned transaction, the Company's economic ownership interest in Manning & Napier Group increased.
	Revolving Credit Agreement
	On April 23, 2015, the Company, Manning & Napier Group and MNA (collectively, the "Borrowers") entered into a $100.0 million revolving credit agreement (the "Credit Agreement”) with Wells Fargo Bank, National Association, as administrative agent and other lenders (collectively, the “Lenders”). The Credit Agreement has a four-year term, and amounts outstanding bear interest at either LIBOR or a base rate plus margin, at the option of the Borrowers. The Credit Agreement contains certain customary covenants that may impact the Borrowers' ability to incur additional debt, make investments, as well as require the Borrowers to maintain certain financial ratios.
	Termination of Line of Credit
	On April 23, 2015, the existing $10.0 million Note with M&T Bank was terminated in connection with entering into the Credit Agreement. There were no amounts outstanding under that facility.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Critical Accounting Policies	Critical Accounting Policies
	There have been no significant changes in our critical accounting policies and estimates from those that were disclosed in our Annual Report on Form 10-K for the year ended December 31, 2014.
	The Company believes that the disclosures herein are adequate so that the information presented is not misleading; however, these financial statements should be read in conjunction with the financial statements and the notes thereto in our Annual Report on Form 10-K for the year ended December 31, 2014. The financial data for the interim periods may not necessarily be indicative of results for future interim periods or for the full year.
Basis of Presentation	Basis of Presentation
	The accompanying unaudited consolidated financial statements were prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and related rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) for interim financial reporting and include all adjustments, consisting only of normal recurring adjustments which are, in the opinion of management, necessary for a fair statement of the results for the interim period.
	The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates or assumptions that affect the reported amounts and disclosures in the consolidated financial statements. Actual results could differ from these estimates or assumptions.
Principles of Consolidation	Principles of Consolidation
	As of March 31, 2015, Manning & Napier holds an approximately 15.6% economic interest in Manning & Napier Group but, as managing member, controls all of the business and affairs of Manning & Napier Group. As a result, the Company consolidates the financial results of Manning & Napier Group and records a noncontrolling interest on its consolidated statements of financial condition with respect to the remaining economic interest in Manning & Napier Group held by Manning & Napier Group Holdings, LLC (“M&N Group Holdings”) and Manning & Napier Capital Company, LLC (“MNCC”).
	All material intercompany transactions have been eliminated in consolidation.
	In accordance with Accounting Standards Codification ("ASU") 2009-17, Consolidation (Topic 810) – Improvements to Financial Reporting by Enterprises Involved with Variable Interest Entities, the determination of whether a company is required to consolidate an entity is based on, among other things, an entity’s purpose and design, a company’s ability to direct the activities of the entity that most significantly impact the entity’s economic performance, and whether a company is obligated to absorb losses or receive benefits that could potentially be significant to the entity. The standard also requires ongoing assessments of whether a company is the primary beneficiary of a variable interest entity (“VIE”). In January 2010, the FASB deferred portions of ASU 2009-17 that relate to certain investment companies. The Company determined that certain entities for which it is the investment manager and/or general partner, qualify for the scope deferral and will continue to be assessed for consolidation under prior accounting guidance for consolidation of VIEs.
	The Company provides seed capital to its investment teams to develop new products and services for its clients. The original seed investment typically represents all or a majority of the equity investment in the new product. Pursuant to U.S. GAAP, the Company evaluates its seed investments on a regular basis and consolidates such investments for which it holds a controlling financial interest.
	The Company serves as the investment adviser for Manning & Napier Fund, Inc. series of mutual funds (the “Fund”) and the Exeter Trust Company Collective Investment Trusts (“CIT”). The Fund and CIT are legal entities, the business and affairs of which are managed by their respective boards of directors. As a result, each of these entities is a voting interest entity (“VOE”). While the Company holds, in limited cases, direct investments in a fund (which are made on the same terms as are available to other investors and do not represent a majority voting interest in any fund), the Company does not have a controlling financial interest or a majority voting interest and, as such, does not consolidate these entities.
	The Company is the General Partner of the MN Xenon Managed Futures Fund LP ("LP Fund"). The Company has determined that the LP Fund is not a VIE as (a) the entity has enough equity to finance its activities without additional financial support and (b) the limited partners, as a group, have the ability to remove the general partner ("kick-out rights") with a majority vote of partnership percentage. Under the voting interest model, the Company does not consolidate VOEs in which the presumption of control by the general partner is overcome by kick-out rights.
Cash and Cash Equivalents	Cash and Cash Equivalents
	The Company considers all highly liquid investments with original maturities of three months or less to be cash equivalents. Cash and cash equivalents are primarily held in operating accounts at major financial institutions and also in money market securities. Cash equivalents are stated at cost, which approximates market value due to the short-term maturity of these investments. The fair value of cash equivalents have been classified as Level 1 in accordance with the fair value hierarchy.
Due from broker	Due from broker
	The Company and its consolidated funds conducts business with brokers for certain of its investment activities. The due from broker balances on the consolidated statements of financial condition represents cash held by brokers as collateral for managed futures.
Investment Securities	Investment Securities
	Investment securities are classified as either trading or available-for-sale and are carried at fair value. Fair value is determined based on quoted market prices in active markets for identical or similar instruments.
	Investment securities classified as trading consist of equity securities, fixed income securities, and investments in mutual funds and hedge funds for which the Company provides advisory services. Realized and unrealized gains and losses on trading securities are recorded in net gains (losses) on investments in the consolidated statements of operations. At March 31, 2015, trading securities consist solely of investments held by the Company to provide initial cash seeding for product development purposes.
Operating Segments	Operating Segments
	The Company operates in one segment, the investment management industry. The Company primarily provides investment management services to separately managed accounts, mutual funds and collective investment trust funds. Management assesses the financial performance of these vehicles on a combined basis.
Revenue	Revenue
	The majority of the Company’s revenues are based on fees charged to manage customers’ portfolios. Investment management fees are generally computed as a percentage of assets under management ("AUM") and recognized as earned. Fees for providing investment advisory services are computed and billed in accordance with the provisions of the applicable investment management agreements. For the Company’s separately managed accounts, clients either pay investment management fees in advance, typically for a semi-annual or quarterly period, or in arrears, typically for a monthly or quarterly period. When investment management fees are paid in advance, the Company defers the revenue and recognizes it over the applicable period. When investment management fees are paid in arrears, the Company estimates revenues based on AUM market values as of the most recent month end date, and adjusts to actual when billed. For mutual funds and collective investment trust vehicles, the Company’s fees are calculated and earned daily based on AUM.
	Certain investment advisory contracts provide for a performance-based fee, in addition to a base investment management fee, which is calculated as a percentage of cumulative profits over and above the aggregate of previous period cumulative profits. Performance-based fees are recorded as a component of revenue at the end of each contract’s measurement period, when all contingencies are resolved, typically on a quarterly basis. For the three months ended March 31, 2015, the Company recognized approximately $0.1 million in performance fee income.
	The Company has agreements with third parties who provide distribution and administrative services for its mutual funds, collective investment trusts and certain separately managed accounts. Third party agreements are evaluated against Financial Accounting Standards Board ("FASB") ASC 605-45 Revenue Recognition - Principal Agent Considerations to determine whether revenue should be reported gross or net of payments to third-party service providers. In management's judgment there are various indicators that support gross revenue reporting, the most notable being the Company acts as primary obligor and therefore principal service provider. Based on this evaluation, investment management service revenue is recorded gross of distribution and administrative fees paid to third parties.
Advisory Agreements	Advisory Agreements
	The Company derives significant revenue from its role as advisor to the Fund and the CIT.
	The Company's investments in the Fund amounted to approximately $0.2 million as of March 31, 2015 and December 31, 2014.
	Fees earned for advisory related services provided to the Fund and CIT investment vehicles were approximately $45.2 million and $52.1 million for the three months ended March 31, 2015 and 2014, respectively. These amounts represent greater than 10% of the Company's revenue in each respective period.

Noncontrolling_Interests_Table

Noncontrolling Interests (Tables)	3 Months Ended
	Mar. 31, 2015
Noncontrolling Interest [Abstract]
Reconciliation from Income Before Provision for Income Taxes to Net Income Attributable to Manning & Napier, Inc.	The following provides a reconciliation from “Income before provision for income taxes” to “Net income attributable to Manning & Napier, Inc.”:
			Three months ended March 31,
			2015			2014
			(in thousands)
	Income before provision for income taxes		$	38,590		$	22,720
	Less: (loss) gain before provision for income taxes of Manning & Napier, Inc. (a)		(18		)	2,105
	Income before provision for income taxes, as adjusted		38,608			20,615
	Controlling interest percentage (b)		14.5		%	14		%
	Net income attributable to controlling interest		5,614			2,876
	Plus: (loss) gain before provision for income taxes of Manning & Napier, Inc. (a)		(18		)	2,105
	Income before income taxes attributable to Manning & Napier, Inc.		5,596			4,981
	Less: provision for income taxes of Manning & Napier, Inc. (c)		2,287			4,900
	Net income attributable to Manning & Napier, Inc.		$	3,309		$	81
	________________________
	a)	Manning & Napier, Inc. incurs certain gains or expenses that are only attributable to it and are therefore excluded from the net income attributable to noncontrolling interests.
	b)	Income before provision for income taxes is allocated to the controlling interest based on the percentage of units of Manning & Napier Group held by Manning & Napier, Inc. The amount represents the Company's weighted ownership of Manning & Napier Group for the respective periods.
	c)	The consolidated provision for income taxes is equal to the sum of (i) the provision for income taxes for entities other than Manning & Napier, Inc. and (ii) the provision for income taxes of Manning & Napier, Inc. which includes all U.S. federal and state income taxes. The consolidated provision for income taxes totaled approximately $2.5 million and $5.1 million for the three months ended March 31, 2015 and 2014, respectively.

Investment_Securities_Tables

Investment Securities (Tables)	3 Months Ended
	Mar. 31, 2015
Investments [Abstract]
Company's Investment Securities Holdings	The following represents the Company’s investment securities holdings as of March 31, 2015 and December 31, 2014:
		31-Mar-15
		Cost		Unrealized		Unrealized			Fair
				Gains		Losses			Value
		(in thousands)
	Available-for-sale securities
	U.S. Treasury notes (0.25%, 10/31/2015)	$	2,107	$	—	$	(1	)	$	2,106
	Trading securities
	Equity securities								10,215
	Fixed income securities								9,076
	Mutual funds								166
	Hedge funds								3,647
									23,104
	Total investment securities								$	25,210
		31-Dec-14
		Cost		Unrealized		Unrealized			Fair
				Gains		Losses			Value
		(in thousands)
	Available-for-sale securities
	U.S. Treasury notes (0.25%, 10/31/2015)	$	2,107	$	—	$	—		$	2,107
	Trading securities
	Equity securities								12,048
	Fixed income securities								9,366
	Mutual funds								168
	Hedge funds								3,226
									24,808
	Total investment securities								$	26,915

Derivative_Instruments_Tables

Derivative Instruments (Tables)	3 Months Ended
	Mar. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments	The following tables present the notional value and fair value as of March 31, 2015 and December 31, 2014 for derivative instruments not designated as hedging instruments:
			March 31, 2015
							Fair Value
			Notional Value				Asset Derivative				Liability Derivative
			(in thousands)
	Interest rate futures		$	166,119			$	306			$	(240	)
	Index futures		2,035				37				(1		)
	Commodity futures		4,168				87				(38		)
	Currency futures		10,171				1				(140		)
	Total derivatives		$	182,493			$	431			$	(419	)
			December 31, 2014
						Fair Value
			Notional Value			Asset Derivative			Liability Derivative
			(in thousands)
	Interest rate futures		106,932			162			(60	)
	Index futures		2,032			51			(16	)
	Commodity futures		3,506			41			(76	)
	Currency futures		10,017			162			(17	)
	Total derivatives		122,487			416			(169	)
Schedules of Derivative Gains and Losses	The following table presents the gains (losses) recognized in net gains (losses) on investments in the consolidated statements of operations for the three months ended March 31, 2015 and 2014:
		Three months ended March 31,
		2015				2014
		(in thousands)
	Interest rate futures	$	118			$	(365	)
	Index futures	71				—
	Commodity futures	20				—
	Currency futures	294				—
	Balance as of end of period	$	503			$	(365	)
Offsetting of Managed Futures	The following table presents the offsetting of managed futures as of March 31, 2015 and December 31, 2014:
			Gross Amounts of Recognized Liabilities				Gross Amounts Offset in the Statement of Financial Position				Net Amounts of Assets (Liabilities) Presented in the Statement of Financial Position			Financial Instruments		Cash Collateral Received (Pledged)		Net Amount
			(in thousands)
	March 31, 2015		$	(419	)		$	431			$	12		$	—	$	—	$	12
	December 31, 2014		$	(169	)		$	416			$	247		$	—	$	—	$	247

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Hierarchy of Inputs Used to Derive the Fair Value of Company's Assets	The following provides the hierarchy of inputs used to derive the fair value of the Company’s financial instruments as of March 31, 2015 and December 31, 2014:
		March 31, 2015
		Level 1		Level 2		Level 3		Totals
		(in thousands)
	Equity securities	$	10,215	$	—	$	—	$	10,215
	Fixed income securities	1,100		7,976		—		9,076
	Mutual funds	166		—		—		166
	Hedge funds	—		3,647		—		3,647
	U.S. Treasury notes	—		2,106		—		2,106
	Derivatives	431		—		—		431
	Total assets at fair value	$	11,912	$	13,729	$	—	$	25,641
	Derivatives	$	419	$	—	$	—	$	419
	Total liabilities at fair value	$	419	$	—	$	—	$	419
		December 31, 2014
		Level 1		Level 2		Level 3		Totals
		(in thousands)
	Equity securities	$	12,048	$	—	$	—	$	12,048
	Fixed income securities	1,154		8,212		—		9,366
	Mutual funds	168		—		—		168
	Hedge funds	—		3,226		—		3,226
	U.S. Treasury notes	—		2,107		—		2,107
	Derivatives	416		—		—		416
	Total assets at fair value	$	13,786	$	13,545	$	—	$	27,331
	Securities sold, not yet purchased	$	964	$	—	$	—	$	964
	Derivatives	169		—		—		169
	Total liabilities at fair value	$	1,133	$	—	$	—	$	1,133

Accrued_Expenses_and_Other_Lia1

Accrued Expenses and Other Liabilities (Tables)	3 Months Ended
	Mar. 31, 2015
Accounts Payable and Accrued Liabilities [Abstract]
Accrued Expenses and Other Liabilities	Accrued expenses and other liabilities as of March 31, 2015 and December 31, 2014 consisted of the following:
		31-Mar-15		31-Dec-14
		(in thousands)
	Accrued bonus and sales commissions	$	12,396	$	28,801
	Accrued payroll and benefits	2,545		3,424
	Accrued sub-transfer agent fees	7,801		8,108
	Dividends payable	2,194		3,291
	Amounts payable under tax receivable agreement	2,100		2,100
	Securities sold, not yet purchased	—		964
	Other accruals and liabilities	6,155		4,091
		$	33,191	$	50,779

Earnings_per_Common_Share_Tabl

Earnings per Common Share (Tables)	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Calculation of basic and diluted earnings per share	The following is a reconciliation of the income and share data used in the basic and diluted earnings per share computations for the three months ended March 31, 2015 and 2014:
		Three months ended March 31,
		2015		2014
		(in thousands, except share data)
	Net income attributable to controlling and noncontrolling interests	$	36,111	$	17,644
	Less: net income attributable to noncontrolling interests	32,802		17,563
	Net income attributable to Manning & Napier, Inc.	$	3,309	$	81
	Weighted average shares of Class A common stock outstanding - basic	13,713,540		13,634,401
	Dilutive effect from restricted stock units	201,368		117,289
	Weighted average shares of Class A common stock outstanding - diluted	13,914,908		13,751,690
	Net income available to Class A common stock per share - basic	$	0.24	$	0.01
	Net income available to Class A common stock per share - diluted	$	0.24	$	0.01

Equity_Based_Compensation_Tabl

Equity Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2015
Share-based Compensation [Abstract]
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity	The following table summarizes stock award activity for the three months ended March 31, 2015 under the Company's Equity Plan:
		Restricted		Weighted Average Grant Date Fair Value
		Stock Awards
	Stock awards outstanding at January 1, 2015	855,009		$	15.32
	Granted	—		$	—
	Vested	—		$	—
	Forfeited	(12,780	)	$	15.6
	Stock awards outstanding at March 31, 2015	842,229		$	15.31

Income_Taxes_Tables

Income Taxes (Tables)	3 Months Ended
	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Income Tax Provision and Effective Tax Rate	The Company’s income tax provision and effective tax rate were as follows:
		Three months ended March 31,
		2015			2014
		(in thousands)
	Earnings from continuing operations before income taxes	$	38,590		$	22,720
	Effective tax rate	6.4		%	22.3		%
	Provision for income taxes	2,479			5,076
	Provision for income taxes @ 35%	13,507			7,952
	Difference between tax at effective vs. statutory rate	$	(11,028	)	$	(2,876	)

Organization_and_Nature_of_the1

Organization and Nature of the Business (Details)	3 Months Ended
	Mar. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Class A common Stock of Public Investors	100.00%
Class B common Stock of William Manning	100.00%
Voting Rights held by public	49.80%
Percentage of voting rights held by majority shareholder	50.20%
Percentage of economic rights held by public	100.00%
Percentage Of Economic Rights Held By Controlling Shareholder	0.00%
Outside ownership interest in limited liability and limited partnership companies	1.00%
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest	15.60%
Majority Outside Ownership Interest in limited liability and limited partnership companies	83.40%
Outside Voting Rights in Limited Liability Company LLC or Limited Partnership companies	1.00%
Managing Member or General Partner Voting Rights In Limited Liability Company LLC or Limited Partnership	15.60%
Majority Outside Voting Rights in Limited Liability Company LLC or Limited Partnership companies	83.40%
Outside Economic Rights in Limited Liability Company LLC or Limited Partnership companies	1.00%
Managing Member or General Partner Economic Rights of Limited Liability Company LLC or Limited	15.60%
Majority Outside Economic Rights in Limited Liability Company LLC Or Limited Partnership Companies	83.40%

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
	Segment
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of segments	1
Performance Fees	$100,000
Trading Securities, Fair Value	23,104,000		24,808,000
Fees earned for advisory related services provided to the Fund and CIT investment vehicles	45,200,000	52,100,000
Mutual Funds
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Trading Securities, Fair Value	166,000		168,000
Mutual Funds | Manning & Napier Fund
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Trading Securities, Fair Value	$166,000		$168,000
Manning & Napier Group, LLC
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)	15.60%

Noncontrolling_Interests_Recon

Noncontrolling Interests (Reconciliation of Income) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Noncontrolling Interest [Abstract]
Income before provision for income taxes	$38,590		$22,720
Less: gain (loss) before provision for income taxes of Manning & Napier, Inc.	-18	[1]	2,105	[1]
Income before provision for income taxes, as adjusted	38,608		20,615
Controlling interest percentage	14.50%	[2]	14.00%	[2]
Net income attributable to controlling interest	5,614		2,876
Plus: gain (loss) before provision for income taxes of Manning & Napier, Inc.	-18	[1]	2,105	[1]
Income before income taxes attributable to Manning & Napier, Inc.	5,596		4,981
Less: provision for income taxes of Manning & Napier, Inc.	2,287	[3]	4,900	[3]
Net income attributable to Manning & Napier, Inc.	3,309		81
Provision for income taxes	$2,479		$5,076
[1]	Manning & Napier, Inc. incurs certain gains or expenses that are only attributable to it and are therefore excluded from the net income attributable to noncontrolling interests
[2]	Income before provision for income taxes is allocated to the controlling interest based on the percentage of units of Manning & Napier Group held by Manning & Napier, Inc. The amount represents the Company's weighted ownership of Manning & Napier Group for the respective periods.
[3]	The consolidated provision for income taxes is equal to the sum of (i) the provision for income taxes for entities other than Manning & Napier, Inc. and (ii) the provision for income taxes of Manning & Napier, Inc. which includes all U.S. federal and state income taxes. The consolidated provision for income taxes totaled approximately $2.5 million and $5.1 million for the three months ended March 31, 2015 and 2014, respectively.

Noncontrolling_Interests_Textu

Noncontrolling Interests (Textual) (Detail) (USD $)	3 Months Ended		0 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Dec. 31, 2014
Noncontrolling Interest [Line Items]
Distributions	($26,787,000)	($26,972,000)
Payments due to selling unit holders	41,300,000		41,300,000	41,200,000
Amounts payable under tax receivable agreement	2,100,000		2,100,000	2,100,000
Payments for TRA	0	0
Manning & Napier Group, LLC
Noncontrolling Interest [Line Items]
Percentage of economic interest in Manning & Napier Group held by Manning & Napier, Inc (percent)	15.60%		15.60%
Purchase of Class A units of Manning & Napier Group, LLC held by noncontrolling interests, shares			3,161,502
Payments to acquire additional interest in subsidiaries			36,300,000
Purchase of Class A units of Manning & Napier Group, LLC held by noncontrolling interests, unvested, shares			2,516,352
Payments to acquire additional interest in subsidiaries, unvested			$1,400,000
Manning And Napier Group Holding LLC
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)	84.40%		84.40%
Class A units | Class A Units | Manning & Napier Group, LLC
Noncontrolling Interest [Line Items]
Number of common units available for conversion	67,896,484	73,762,186	67,896,484

Investment_Securities_Companys

Investment Securities (Company's Investment Securities Holdings) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Investment Holdings [Line Items]
Trading Securities, Fair Value	$23,104	$24,808
Total investment securities	25,210	26,915
U.S. Treasury notes (0.25%, 10/31/2015)
Investment Holdings [Line Items]
Percentage of Notes	0.25%	0.25%
Cost	2,107	2,107
Unrealized Gains	0	0
Unrealized Losses	-1	0
Fair Value	2,106	2,107
Equity securities
Investment Holdings [Line Items]
Trading Securities, Fair Value	10,215	12,048
Fixed income securities
Investment Holdings [Line Items]
Trading Securities, Fair Value	9,076	9,366
Mutual Funds
Investment Holdings [Line Items]
Trading Securities, Fair Value	166	168
Hedge Funds
Investment Holdings [Line Items]
Trading Securities, Fair Value	3,647	3,226
Manning & Napier Fund | Mutual Funds
Investment Holdings [Line Items]
Trading Securities, Fair Value	166	168
Manning & Napier Fund | Hedge Funds
Investment Holdings [Line Items]
Trading Securities, Fair Value	$3,647	$3,226

Investment_Securities_Textual_

Investment Securities (Textual) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Investments [Abstract]
Recognized net unrealized gains on trading securities	$200,000	$500,000
Available-for-sale Securities, Restricted	600,000		600,000
Other than Temporary Impairment Losses Recognized	$0	$0

Derivative_Instruments_Derivat

Derivative Instruments - Derivative Instruments (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Future
Derivative [Line Items]
Asset Derivative	$431,000	$416,000
Liability Derivative	-419,000	-169,000
Not Designated as Hedging Instrument
Derivative [Line Items]
Notional Value	182,493,000	122,487,000
Asset Derivative	431,000	416,000
Liability Derivative	-419,000	-169,000
Not Designated as Hedging Instrument | Future
Derivative [Line Items]
Average Volume of Derivative Activity	199,900,000
Not Designated as Hedging Instrument | Interest Rate Contract | Future
Derivative [Line Items]
Notional Value	166,119,000	106,932,000
Asset Derivative	306,000	162,000
Liability Derivative	-240,000	-60,000
Not Designated as Hedging Instrument | Index Contract | Future
Derivative [Line Items]
Notional Value	2,035,000	2,032,000
Asset Derivative	37,000	51,000
Liability Derivative	-1,000	-16,000
Not Designated as Hedging Instrument | Commodity Contract | Future
Derivative [Line Items]
Notional Value	4,168,000	3,506,000
Asset Derivative	87,000	41,000
Liability Derivative	-38,000	-76,000
Not Designated as Hedging Instrument | Currency Contract | Future
Derivative [Line Items]
Notional Value	10,171,000	10,017,000
Asset Derivative	1,000	162,000
Liability Derivative	($140,000)	($17,000)

Derivative_Instruments_Gains_a

Derivative Instruments - Gains and Losses (Details) (Not Designated as Hedging Instrument, Net Capital Gains (Losses) on Investments, USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$503	($365)
Future | Interest Rate Contract
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	118	-365
Future | Index Contract
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	71	0
Future | Commodity Contract
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	20	0
Future | Currency Contract
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$294	$0

Derivative_Instruments_Offsett

Derivative Instruments - Offsetting (Details) (Future, USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Future
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	($419)	($169)
Gross Amounts Offset in the Statement of Financial Position	431	416
Net Amounts of Assets (Liabilities) Presented in the Statement of Financial Position	12	247
Financial Instruments	0	0
Cash Collateral Received (Pledged)	0	0
Net Amount	$12	$247

Fair_Value_Measurements_Detail

Fair Value Measurements (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities, at fair value	$23,104	$24,808
Derivatives	431
Total assets at fair value	25,641	27,331
Securities sold, not yet purchased	0	964
Derivatives	419	169
Total liabilities at fair value	419	1,133
Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities, at fair value	10,215	12,048
Fixed income securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities, at fair value	9,076	9,366
Mutual Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities, at fair value	166	168
Hedge Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities, at fair value	3,647	3,226
U.S. Treasury Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	2,106	2,107
Derivatives		416
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives	431
Total assets at fair value	11,912	13,786
Securities sold, not yet purchased		964
Derivatives	419	169
Total liabilities at fair value	419	1,133
Level 1 | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities, at fair value	10,215	12,048
Level 1 | Fixed income securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities, at fair value	1,100	1,154
Level 1 | Mutual Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities, at fair value	166	168
Level 1 | Hedge Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities, at fair value	0	0
Level 1 | U.S. Treasury Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	0	0
Derivatives		416
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives	0
Total assets at fair value	13,729	13,545
Securities sold, not yet purchased		0
Derivatives	0	0
Total liabilities at fair value	0	0
Level 2 | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities, at fair value	0	0
Level 2 | Fixed income securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities, at fair value	7,976	8,212
Level 2 | Mutual Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities, at fair value	0	0
Level 2 | Hedge Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities, at fair value	3,647	3,226
Level 2 | U.S. Treasury Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	2,106	2,107
Derivatives		0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives	0
Total assets at fair value	0	0
Securities sold, not yet purchased		0
Derivatives	0	0
Total liabilities at fair value	0	0
Level 3 | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities, at fair value	0	0
Level 3 | Fixed income securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities, at fair value	0	0
Level 3 | Mutual Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities, at fair value	0	0
Level 3 | Hedge Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities, at fair value	0	0
Level 3 | U.S. Treasury Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	0	0
Derivatives		$0

Accrued_Expenses_and_Other_Lia2

Accrued Expenses and Other Liabilities (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Accounts Payable and Accrued Liabilities [Abstract]
Accrued bonus and sales commissions	$12,396	$28,801
Accrued payroll and benefits	2,545	3,424
Accrued sub-transfer agent fees	7,801	8,108
Dividends payable	2,194	3,291
Amounts payable under tax receivable agreement	2,100	2,100
Securities sold, not yet purchased	0	964
Other accruals and liabilities	6,155	4,091
Accrued expenses and other liabilities	$33,191	$50,779

Line_of_Credit_Details

Line of Credit (Details) (Revolving Credit Facility, USD $)	0 Months Ended
	Feb. 13, 2013
Debt Instrument [Line Items]
Revolving line of credit, maximum borrowing capacity	10,000,000
Default interest rate, spread above stated interest rate (percent)	5.00%
LIBOR
Debt Instrument [Line Items]
Interest rate description	LIBOR
Basis spread on variable rate (percent)	1.50%

Earnings_per_Common_Share_Deta

Earnings per Common Share (Details) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income attributable to controlling and noncontrolling interests	$36,111	$17,644
Less: net income attributable to noncontrolling interests	32,802	17,563
Net income attributable to Manning & Napier, Inc.	$3,309	$81
Weighted average basic shares of Class A common stock outstanding (shares)	13,713,540	13,634,401
Weighted Average Number Diluted Shares Outstanding Adjustment	201,368	117,289
Weighted average diluted shares of Class A common stock outstanding (shares)	13,914,908	13,751,690
Net income available to Class A common stock per basic (dollars per share)	$0.24	$0.01
Net income (loss) available to Class A common stock per share - diluted (dollars per share)	$0.24	$0.01
Class A common stock | Class A units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Class A common stock excluded from computation of earnings per share (in shares)	67,896,484	73,762,186
Manning & Napier Group, LLC | Class A units | Class A Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of common units available for conversion	67,896,484	73,762,186
Vesting over Three Year Service Period | Restricted Stock Units (RSUs) | 2011 Plan | Class A common stock | Performance Shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Class A common stock excluded from computation of earnings per share (in shares)	181,378

Equity_Based_Compensation_Rest

Equity Based Compensation (Restricted Stock Awards) (Details) (Restricted Stock Awards, USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Restricted Stock Awards
Stock Units
Stock unit awards, beginning balance (shares)	855,009
Granted (shares)	0
Vested (shares)	0
Forfeited (shares)	-12,780
Stock unit awards, ending balance (shares)	842,229
Weighted Average Grant Date Fair Value
Stock unit awards, beginning balance, weighted average grant date fair value (dollars per share)	$15.32
Granted, weighted average grant date fair value (dollars per share)	$0	$16.16
Vested, weighted average grant date fair value (dollars per share)	$0
Forfeited, weighted average grant date fair value (dollars per share)	$15.60
Stock unit awards, ending balance, weighted average grant date fair value (dollars per share)	$15.31

Equity_Based_Compensation_Text

Equity Based Compensation (Textual) (Details) (USD $)	3 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (shares)	0
Weighted average fair value of the awards granted (dollars per share)	$0	$16.16
Reorganization Related
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense		$21.90
2011 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized	13,142,813
Share-based compensation expense	0.6	0.8
Unrecognized compensation expense related to unvested awards	$5.20
Weighted average period of unrecognized compensation expense (years)	1 year 8 months

Income_Taxes_Details

Income Taxes (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Income Tax Disclosure [Abstract]
Earnings from continuing operations before income taxes	$38,590,000	$22,720,000
Effective Tax Rate (percent)	6.40%	22.30%
Provision for income taxes	2,479,000	5,076,000
Provision for income taxes @ 35%	13,507,000	7,952,000
Difference between tax at effective vs. statutory rate	-11,028,000	-2,876,000
Effective income tax rate, federal statutory income tax rate (percent)	35.00%	35.00%
Change in enacted tax rate amount		$2,200,000

Related_Party_Transactions_Det

Related Party Transactions (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015
Related Party Transactions [Abstract]
Investment advisory fees waived	$0.10

Subsequent_Events_Details

Subsequent Events (Details) (USD $)	3 Months Ended		0 Months Ended
Share data in Millions, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	6-May-15	Apr. 23, 2015	Apr. 16, 2015	Feb. 13, 2013
Subsequent Event [Line Items]
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	$26,787,000	$26,972,000
Per share dividend declared to the holders of Class A common stock	$0.16	$0.16
Class A common stock
Subsequent Event [Line Items]
Per share dividend declared to the holders of Class A common stock	$0.16	$0.16
Non Controlling Interest
Subsequent Event [Line Items]
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	-26,787,000	26,972,000
Non Controlling Interest | Subsequent Event
Subsequent Event [Line Items]
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders			26,200,000
Manning & Napier Group, LLC | Subsequent Event
Subsequent Event [Line Items]
Amount approved for distribution to members of Manning & Napier Group			31,300,000
Manning & Napier Group, LLC | Subsequent Event | Class A common stock
Subsequent Event [Line Items]
Per share dividend declared to the holders of Class A common stock			$0.16
Revolving Credit Facility
Subsequent Event [Line Items]
Revolving line of credit, maximum borrowing capacity						10,000,000
Revolving Credit Facility $100.0 Million | Revolving Credit Facility | Subsequent Event
Subsequent Event [Line Items]
Revolving line of credit, maximum borrowing capacity				100,000,000
Revolving line of credit term (in years)				4 years
Revolving Credit Facility $10.0 Million | Revolving Credit Facility | Subsequent Event
Subsequent Event [Line Items]
Line of credit, amount outstanding				0
2011 Plan | Subsequent Event | Class A common stock
Subsequent Event [Line Items]
Number of shares issued					1.1
Award vesting period (years)					6 years
M&T Bank | Revolving Credit Facility $10.0 Million | Revolving Credit Facility
Subsequent Event [Line Items]
Revolving line of credit, maximum borrowing capacity						$10,000,000