Summary of Significant Accounting Policies (Policies)	12 Months Ended
Summary of Significant Accounting Policies (Policies)	Dec. 31, 2018
Accounting Policies [Abstract]
Basis of Presentation	The Company’s consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP").
Consolidation	The consolidated financial statements include the accounts of the Company, its subsidiaries and investment products that are consolidated. Voting interest entities ("VOEs") are consolidated when the Company is considered to have a controlling financial interest, which is typically present when the Company owns a majority of the voting interest in an entity or otherwise has the power to govern the financial and operating policies of the entity. See Note 19 for additional information related to the consolidation of investment products. Intercompany accounts and transactions have been eliminated.
Variable Interest Entities	The Company evaluates the appropriateness of consolidation of any variable interest entity ("VIEs") in which the Company has a variable interest. A VIE is an entity in which either (a) the equity investment at risk is not sufficient to permit the entity to finance its own activities without additional financial support or (b) where as a group, the holders of the equity investment at risk do not possess: (i) the power through voting or similar rights to direct the activities that most significantly impact the entity’s economic performance; (ii) the obligation to absorb expected losses or the right to receive expected residual returns of the entity; or (iii) proportionate voting and economic interests and where substantially all of the entity’s activities either involve or are conducted on behalf of an investor with disproportionately fewer voting rights. If an entity has any of these characteristics, it is considered a VIE and is required to be consolidated by its primary beneficiary. The primary beneficiary is the entity that has both the power to direct the activities that most significantly impact the VIE’s economic performance and has the obligation to absorb losses of, or the right to receive benefits from, the VIE that could potentially be significant to the VIE. The Company serves as the collateral manager for other collateralized loan and collateralized bond obligations (collectively, "CDOs") that are not consolidated. The assets and liabilities of these CDOs reside in bankruptcy remote, special purpose entities in which the Company has no ownership, nor holds any notes issued by, the CDOs, and provides neither recourse nor guarantees. The Company has determined that the investment management fees it receives for serving as collateral manager for these CDOs did not represent a variable interest as: (1) the fees the Company earns are compensation for services provided and are commensurate with the level of effort required to provide the investment management services; (2) the Company does not hold other interests in the CDOs that individually, or in the aggregate, would absorb more than an insignificant amount of the CDO's expected losses or receive more than an insignificant amount of the CDO's expected residual return; and (3) the investment management arrangement only includes terms, conditions and amounts that are customarily present in arrangements for similar services negotiated at arm's length. The Company has interests in certain other entities that are VIEs that the Company does not consolidate as it is not the primary beneficiary of those entities. The Company is not the primary beneficiary as its interest in these entities does not provide the Company with the power to direct the activities that most significantly impact the entities' economic performance. The consolidated financial statements include the accounts of the Company, its subsidiaries and investment products that are consolidated. Voting interest entities ("VOEs") are consolidated when the Company is considered to have a controlling financial interest, which is typically present when the Company owns a majority of the voting interest in an entity or otherwise has the power to govern the financial and operating policies of the entity. The Company evaluates any variable interest entities ("VIEs") in which the Company has a variable interest for consolidation. A VIE is an entity in which either: (a) the equity investment at risk is not sufficient to permit the entity to finance its own activities without additional financial support; or (b) where as a group, the holders of the equity investment at risk do not possess: (i) the power through voting or similar rights to direct the activities that most significantly impact the entity’s economic performance, (ii) the obligation to absorb expected losses or the right to receive expected residual returns of the entity or (iii) proportionate voting and economic interests and where substantially all of the entity’s activities either involve or are conducted on behalf of an investor with disproportionately fewer voting rights. If an entity has any of these characteristics, it is considered a VIE and is required to be consolidated by its primary beneficiary. The primary beneficiary is the entity that has both the power to direct the activities that most significantly impact the VIE’s economic performance and has the obligation to absorb losses of, or the right to receive benefits from, the VIE that could potentially be significant to the VIE. In the normal course of its business, the Company sponsors various investment products, some of which are consolidated by the Company. Consolidated investment products include both VOEs, made up primarily of open-end funds in which the Company holds a controlling financial interest, and VIEs, which primarily consist of collateralized loan obligations ("CLOs") of which the Company is considered the primary beneficiary. The consolidation and deconsolidation of these investment products have no impact on net income (loss) attributable to stockholders. The Company’s risk with respect to these investment products is limited to its beneficial interests in these products. The Company has no right to the benefits from, and does not bear the risks associated with, these investment products beyond the Company’s investments in, and fees generated from, these products.
Reclassifications	The Company has reclassified certain amounts in prior-period financial statements to conform to the current period's presentation. The reclassifications were not material to the Consolidated Financial Statements.
Noncontrolling Interest	Noncontrolling interests include third party investor equity in consolidated investment products and minority interests held in an affiliate. Noncontrolling interests - consolidated investment products Represents third-party investor equity in in the Company's consolidated investment products and are classified as redeemable noncontrolling interests if investors in those products may request withdrawal at any time. Noncontrolling interests - affiliate Represents minority interests held in a consolidated affiliate. Minority interests held in an affiliate are subject to holder put rights and Company call rights at established multiples of earnings before interest, taxes, depreciation and amortization and, as such, are considered redeemable at other than fair value. They are exercisable at pre-established intervals (between four and seven years from their July 2018 issuance or upon certain conditions such as retirement). The put and call rights are not legally detachable or separately exercisable and are deemed to be embedded in the related noncontrolling interests. The Company, in purchasing affiliate equity, has the option to settle in cash or shares of common stock and is entitled to the cash flow associated with any purchased equity. In addition, under certain circumstances the Company may issue or sell equity interests of the affiliate to employees or partners of the affiliate. Affiliate minority interests are generally recorded at estimated redemption value within redeemable noncontrolling interests on the Company's consolidated balance sheets, and changes in estimated redemption value of these interests are recorded in the Company’s consolidated statements of operations within noncontrolling interests.
Use of Estimates	The preparation of the consolidated financial statements requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosures of contingent assets and liabilities at the dates of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting periods. Management believes the estimates used in preparing the consolidated financial statements are reasonable and prudent. Actual results could differ from those estimates.
Segment Information	Accounting Standards Codification ("ASC") 280, Segment Reporting, establishes disclosure requirements relating to operating segments in annual and interim financial statements. Business or operating segments are defined as components of an enterprise about which separate financial information is available that is regularly evaluated by the chief operating decision maker in deciding how to allocate resources and assess performance. The Company operates in one business segment, namely as an asset manager providing investment management and related services for individual and institutional clients. The Company’s Chief Executive Officer is the Company’s chief operating decision maker. Although the Company provides disclosures regarding assets under management and other asset flows by product, the Company’s determination that it operates in one business segment is based on the fact that the same investment professionals manage both retail and institutional products, operational resources support multiple products, such products have the same or similar regulatory framework and the Company’s chief operating decision maker reviews the Company’s financial performance on a consolidated level. Investment managers within the Company are generally not aligned with specific product lines.
Cash and Cash Equivalents	Cash and cash equivalents consist of cash in banks and money market fund investments.
Investments	Investment securities - fair value Investment securities - fair value consist primarily of investments in the Company's sponsored funds, equity securities and trading debt securities and are carried at fair value in accordance with ASC 320, Investments-Debt and Equity Securities ("ASC 320") and Topic 321, Investments-Equity Securities ("ASC 321"). These securities are marked to market based on the respective publicly quoted net asset values of the funds or market prices of the equity securities or bonds. These securities transactions are recorded on a trade date basis. Any unrealized appreciation or depreciation on investment securities is reported as realized and unrealized gain (loss) on investments in the Consolidated Statement of Operations. Investment securities - available for sale Investment securities - available for sale consists of investments in collateralized loan obligations ("CLOs") for which the Company provides investment management services and does not consolidate. These investments are carried at fair value in accordance with ASC 320. Any unrealized appreciation or depreciation on available-for-sale securities, net of income taxes, is reported as a component of accumulated other comprehensive income in equity attributable to stockholders in the Consolidated Statement of Comprehensive Income. On a quarterly basis, the Company conducts a review to assess whether other-than-temporary impairments exist on its available-for-sale investment securities. Other-than-temporary declines in value may exist if the fair value of an investment security has been below the carrying value for an extended period of time. If an other-than-temporary decline in value is determined to exist, the unrealized investment loss, net of tax, is recognized in the Consolidated Statements of Operations in the period in which the other-than-temporary decline in value occurs, as well as an accompanying permanent adjustment to accumulated other comprehensive income. Equity Method Investments The Company’s investment in noncontrolled entities, where the Company does not hold a controlling financial interest but has the ability to significantly influence operating and financial matters, is accounted for under the equity method of accounting in accordance with ASC 323, Investments-Equity Method and Joint Ventures. Under the equity method of accounting, the Company’s share of the noncontrolled entities' net income or loss is recorded in other income (expense), net in the accompanying Consolidated Statements of Operations. Distributions received reduce the Company’s investment. The investment is evaluated for impairment if events or changes indicate that the carrying amount exceeds its fair value. If the carrying amount of an investment does exceed its fair value and the decline in fair value is deemed to be other-than-temporary, an impairment charge will be recorded. Non-qualified Retirement Plan Assets and Liabilities The Company has a non-qualified retirement plan (the "Excess Incentive Plan") that allows certain employees to voluntarily defer compensation. Assets held in trust, which are considered investment securities, are included in investments and are carried at fair value in accordance with ASC 820, Fair Value Measurement; the associated obligations to participants are included in other liabilities in the Company’s Consolidated Balance Sheets and approximate the fair value of the associated assets. See Note 6 Investments for additional information related to the Excess Incentive Plan.
Deferred Commissions	Deferred commissions, which are included in other assets in the Company's Consolidated Balance Sheets, are commissions paid to broker-dealers on sales of certain mutual fund share classes. Deferred commissions are recovered by the receipt of monthly asset-based distributor fees from the mutual funds or contingent deferred sales charges received upon redemption of shares within the contingent deferred sales charge period, depending on the fund share class. The deferred costs resulting from the sale of shares are amortized on a straight-line basis over the period during which redemptions by the purchasing shareholder are subject to a contingent deferred sales charge, depending on the fund share class, or until the underlying shares are redeemed. Deferred commissions are periodically assessed for impairment and additional amortization expense is recorded, as appropriate.
Furniture, Equipment and Leasehold Improvements, Net	Furniture, equipment and leasehold improvements are recorded at cost. Depreciation is computed using the straight-line method over the estimated useful lives of three to seven years for furniture and office equipment, and three to five years for computer equipment and software. Leasehold improvements are depreciated over the shorter of the remaining estimated lives of the related leases or useful lives of the improvements. Major renewals or betterments are capitalized, and recurring repairs and maintenance are expensed as incurred.
Leases	The Company currently leases office space and equipment under various leasing arrangements. Leases are classified as either capital leases or operating leases, as appropriate. Most lease agreements are classified as operating leases and contain renewal options, rent escalation clauses or other inducements provided by the lessor. Rent expense under non-cancelable operating leases with scheduled rent increases or rent holidays is accounted for on a straight-line basis over the lease term, beginning on the date of initial possession or the effective date of the lease agreement. The amount of the excess of straight-line rent expense over scheduled payments is recorded as a deferred liability. Build-out allowances and other such lease incentives are recorded as deferred credits and are amortized on a straight-line basis as a reduction of rent expense beginning in the period they are deemed to be earned, which generally coincides with the effective date of the lease.
Intangible Assets and Goodwill	Goodwill represents the excess of the purchase price of acquisitions and mergers over the identified net assets and liabilities acquired. In accordance with ASC 350, Goodwill and Other Intangible Assets, goodwill is not amortized. A single reporting unit has been identified for the purpose of assessing potential impairments of goodwill. An impairment analysis of goodwill is performed annually or more frequently, if warranted by events or changes in circumstances affecting the Company’s business. The Company follows the Financial Accounting Standards Board ("FASB") Accounting Standards Update ("ASU") 2011-08, Testing Goodwill for Impairment, which states that an entity has the option to first assess qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If, after assessing the totality of events or circumstances, an entity determines it is not more likely than not that the fair value of a reporting unit is less than its carrying amount, then performing the two-step impairment test is unnecessary. The Company’s 2018 and 2017 annual goodwill impairment analysis did not result in any impairment charges. Definite-lived intangible assets are comprised of acquired investment advisory contracts, trade names and certain non-competition agreements. These assets are amortized on a straight-line basis over the estimated useful lives of such assets, which range from five to sixteen years. Definite-lived intangible assets are evaluated for impairment on an ongoing basis whenever events or circumstances indicate that the carrying value of the definite-lived intangible asset may not be fully recoverable. The Company determines if impairment has occurred by comparing estimates of future undiscounted cash flows to the carrying value of assets. Assets are considered impaired, and impairment is recorded, if the carrying value exceeds the expected future undiscounted cash flows. Indefinite-lived intangible assets are comprised of trade names and closed-end and exchange traded fund investment advisory contracts. These assets are tested for impairment annually or when events or changes in circumstances indicate the assets might be impaired. The Company follows ASU No. 2012-02, Testing Indefinite-Lived Intangible Assets for Impairment, which provides entities with an option to perform a qualitative assessment of indefinite-lived intangible assets other than goodwill for impairment to determine if additional impairment testing is necessary. The Company’s 2018 and 2017 annual indefinite-lived intangible assets impairment analysis did not result in any impairment charges.
Treasury Stock	Treasury stock is accounted for under the cost method and is included as a deduction from equity in the Stockholders’ Equity section of the Consolidated Balance Sheets. Upon any subsequent resale, the treasury stock account is reduced by the cost of such stock.
Revenue Recognition	Revenue Recognition The Company's revenues are recognized when a performance obligation is satisfied, which occurs when control of the services is transferred to customers. Investment management fees, distribution and service fees and administration and shareholder service fees are generally calculated as a percentage of average net assets of the investment portfolios managed. The net asset values from which investment management, distribution and service and administration and shareholder service fees are calculated are variable in nature and subject to factors outside of the Company's control such as deposits, withdrawals and market performance. Because of this, they are considered constrained until the end of the contractual measurement period (monthly or quarterly) which is when asset values are generally determinable. Investment Management Fees The Company provides investment management services pursuant to investment management agreements through its affiliated investment advisers (each an "Adviser"). Investment management services represent a series of distinct daily service periods which are performed over time. Fees earned on funds are based on each fund’s average daily or weekly net assets which are generally received and calculated on a monthly basis. The Company records its management fees net of investment management fees paid to unaffiliated subadvisers, as the Company considers itself an agent of the fund as it relates to the day-to-day investment management services performed by unaffiliated subadvisers, with the Company's performance obligation being to arrange for the provision of that service and not control the specified service before that service is performed. Amounts paid to unaffiliated subadvisers for the years ended December 31, 2018, 2017 and 2016 were $46.7 million, $46.7 million and $47.2 million, respectively. Retail separate account fees are generally based on the end of the preceding or current quarter's asset values or on an average of month-end balances. Institutional account fees are generally based on an average of month-end balances or current quarter’s asset values. Fees for structured finance products, for which the Company acts as the collateral manager, consist of senior, subordinated and, in certain instances, incentive management fees. Senior and subordinated management fees are calculated at a contractual fee rate applied against the end of the preceding quarter par value of the total collateral being managed with subordinated fees being recognized only after certain portfolio criteria are met. Incentive fees on certain of the Company's CLOs are typically a percentage of the excess cash flows available to holders of the subordinated notes, above a threshold level internal rate of return. Distribution and Service Fees Distribution and service fees are asset-based fees earned from open-end funds for distribution services. Depending on the fund type or share class, these fees primarily consist of an asset-based fee that is charged to the fund over a period of years to cover allowable sales and marketing expenses for the fund or front-end sales charges which are based on a percentage of the offering price. Asset-based distribution and service fees are primarily based on percentages of the average daily net assets value and are paid monthly pursuant to the terms of the respective distribution and service fee contracts. Distribution and service fees represent two performance obligations comprised of distribution and related shareholder servicing activities. Distribution services are generally satisfied upon the sale of a fund share. Shareholder servicing activities are generally services satisfied over time. The Company distributes its open-end funds through unaffiliated financial intermediaries that comprise national and regional broker dealers. These unaffiliated financial intermediaries provide distribution and shareholder service activities on behalf of the Company. The Company passes related distribution and service fees to these unaffiliated financial intermediaries for these services and considers itself the principal in these arrangements as it has control of the services prior to the services being transferred to the customer. These payments are classified within distribution and other asset-based expenses. Administration & Shareholder Service Fees The Company provides administrative fund services to its open-end funds and certain of its closed-end funds and shareholder services to its open-end funds. Administration and shareholder services are performed over time. The Company earns fees based on each fund’s average daily or weekly net assets which are calculated and paid monthly. Administrative fund services include: record keeping, preparing and filing documents required to comply with securities laws, legal administration and compliance services, customer service, supervision of the activities of the funds’ service providers, tax services and treasury services as well as providing office space, equipment and personnel that may be necessary for managing and administering the business affairs of the funds. Shareholder services include maintaining shareholder accounts, processing shareholder transactions, preparing filings and performing necessary reporting, among other things. Other income and fees consist primarily of redemption income on the early redemption of certain share classes of mutual funds.
Advertising and Promotion	Advertising and promotional costs include print advertising and promotional items and are expensed as incurred. These costs are classified in other operating expenses in the Consolidated Statements of Operations.
Stock-based Compensation	The Company accounts for stock-based compensation expense in accordance with ASC 718, Compensation—Stock Compensation ("ASC 718"), which requires the measurement and recognition of compensation expense for share-based awards based on the estimated fair value on the date of grant. Restricted stock units ("RSUs") are stock awards that entitle the holder to receive shares of the Company’s common stock as the award vests over time or when certain performance targets are achieved. The fair value of each RSU award is based on the fair market value price on the date of grant unless it contains a performance metric that is considered a market condition. RSUs that contain a market condition are valued using a simulation valuation model. Compensation expense for RSU awards is recognized ratably over the vesting period on a straight-line basis.
Income Taxes	The Company accounts for income taxes in accordance with ASC 740, Income Taxes, ("ASC 740") which requires recognition of the amount of taxes payable or refundable for the current year, as well as deferred tax liabilities and assets for the future tax consequences of events that have been included in the Company’s financial statements or tax returns. Deferred tax liabilities and assets result from temporary differences between the book value and tax basis of the Company’s assets, liabilities and carry-forwards, such as net operating losses or tax credits. The Company’s methodology for determining the realizability of deferred tax assets includes consideration of taxable income in prior carryback year(s) if carryback is permitted under the tax law, as well as consideration of the reversal of deferred tax liabilities that are in the same period and jurisdiction and are of the same character as the temporary differences that gave rise to the deferred tax assets. The Company’s methodology also includes estimates of future taxable income from its operations, as well as the expiration dates and amounts of carry-forwards related to net operating losses and capital losses. These estimates are projected through the life of the related deferred tax assets based on assumptions that the Company believes to be reasonable and consistent with demonstrated operating results. Changes in future operating results not currently forecasted may have a significant impact on the realization of deferred tax assets. Valuation allowances are provided when it is determined that it is more likely than not that the benefit of deferred tax assets will not be realized.
Comprehensive Income	The Company reports all changes in comprehensive income in the Consolidated Statements of Changes in Stockholders’ Equity and the Consolidated Statements of Comprehensive Income. Comprehensive income includes net income (loss), foreign currency translation adjustments (net of tax) and unrealized gains and losses on investments classified as available-for-sale (net of tax).
Earnings per Share	Earnings per share ("EPS") is calculated in accordance with ASC 260, Earnings per Share. Basic EPS excludes dilution for potential common stock issuances and is computed by dividing basic net income available to common stockholders by the weighted-average number of common shares outstanding for the period. Diluted EPS reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock, including: (1) shares issuable upon the vesting of RSUs and common stock option exercises using the treasury stock method; and (2) shares issuable upon the conversion of the Company's mandatory convertible preferred stock, as determined under the if-converted method. For purposes of calculating diluted EPS, preferred stock dividends have been subtracted from net income (loss) in periods in which utilizing the if-converted method would be anti-dilutive.
Fair Value Measurement and Fair Value of Financial Instruments	ASC 820, Fair Value Measurements and Disclosures, establishes a framework for measuring fair value and a valuation hierarchy based upon the transparency of inputs used in the valuation of an asset or liability. The FASB defines fair value as the price that would be received to sell an asset, or paid to transfer a liability, in an orderly transaction between market participants at the measurement date. Classification within the hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The valuation hierarchy contains three levels as follows: Level 1—Unadjusted quoted prices for identical instruments in active markets. Level 1 assets and liabilities may include debt securities and equity securities that are traded in an active exchange market. Level 2—Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets. Level 2 inputs may include observable market data such as closing market prices provided by independent pricing services after considering factors such as the yields or prices of comparable investments of comparable quality, coupon, maturity, call rights and other potential prepayments, terms and type, reported transactions, indications as to values from dealers and general market conditions. In addition, pricing services may determine the fair value of equity securities traded principally in foreign markets when it has been determined that there has been a significant trend in the U.S. equity markets or in index futures trading. Level 2 assets and liabilities may include debt and equity securities, purchased loans and over-the-counter derivative contracts whose fair value is determined using a pricing model without significant unobservable market data inputs. Level 3—Valuations derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable in active exchange markets. The following is a discussion of the valuation methodologies used for the Company’s assets measured at fair value. Cash equivalents represent investments in money market funds. Cash investments in actively traded money market funds are valued using published net asset values and are classified as Level 1. Sponsored funds represent investments in open-end funds, closed-end funds and ETFs for which the Company acts as the investment manager. The fair value of open-end funds is determined based on their published net asset values and are categorized as Level 1. The fair value of closed-end funds and ETFs are determined based on the official closing price on the exchange they are traded on and are categorized as Level 1. Equity securities include securities traded on active markets and are valued at the official closing price (typically last sale or bid) on the exchange on which the securities are primarily traded and are categorized as Level 1. Trading debt securities and Investments - available for sale represent investments in CLOs for which the Company provides investment management services. The investments in CLOs are measured at fair value based on independent third party valuations and are categorized as Level 2 and Level 3. The independent third party valuations are based on discounted cash flow models and comparable trade data. Nonqualified retirement plan assets represent mutual funds within a nonqualified retirement plan whose fair value is determined based on their published net asset value and are categorized as Level 1. Cash, accounts receivable, accounts payable and accrued liabilities equal or approximate fair value based on the short-term nature of these instruments. The following is a discussion of the valuation methodologies used for the assets and liabilities of the Company’s consolidated investment products measured at fair value. Cash equivalents represent investments in money market funds. Cash investments in actively traded money market funds are valued using published net asset values and are classified as Level 1. Debt and equity investments represent the underlying debt, equity and other securities held in consolidated investment products. Equity investments are valued at the official closing price on the exchange on which the securities are traded and are generally categorized within Level 1. Level 2 investments represent most debt securities, including bank loans and certain equity securities (including non-US securities), for which closing prices are not readily available or are deemed to not reflect readily available market prices, and are valued using an independent pricing service. Debt investments are valued based on quotations received from independent pricing services or from dealers who make markets in such securities. Bank loan investments, which are included as debt investments are generally priced at the average mid-point of bid and ask quotations obtained from a third-party pricing service. Fair value may also be based upon valuations obtained from independent third-party brokers or dealers utilizing matrix pricing models that consider information regarding securities with similar characteristics. In certain instances, fair value has been determined utilizing discounted cash flow analyses or single broker non-binding quotes. Depending on the nature of the inputs, these assets are classified as Level 1, 2 or 3 within the fair value measurement hierarchy. Level 3 investments include debt securities that are not widely traded, are illiquid, or are priced by dealers based on pricing models used by market makers in the security. For the years ended 2018 and 2017, no securities held by consolidated investment products were transferred from Level 2 to Level 1 and no securities held by consolidated investment products were transferred from Level 1 to Level 2. Notes payable represent notes issued by consolidated investments products that are CLOs and are measured using the measurement alternative in ASU 2014-13. Accordingly, the fair value of CLO liabilities was measured as the fair value of CLO assets less the sum of: (a) the fair value of the beneficial interests held by the Company and (b) the carrying value of any beneficial interests that represent compensation for services. The fair value of the beneficial interests held by the Company is based on third-party pricing information without adjustment.
Recent Accounting Pronouncements	New Accounting Standards Implemented On January 1, 2018, the Company adopted the new Accounting Standards Codification ("ASC") 606, Revenue from Contracts with Customers ("ASC 606"), pursuant to Accounting Standards Update ("ASU") 2014-09, Revenue from Contracts with Customers, and all the related amendments ("the new revenue standard") using the modified retrospective approach. The core principle of the new revenue standard is that revenue is recognized upon the transfer of promised goods or services to customers in an amount that reflects the expected consideration to be received for the goods or services. Based on the revised criteria in the new revenue standard for determining whether the Company is acting as a principal or agent, certain costs that were previously presented on a net of revenue basis are now presented on a gross basis. The comparative periods have not been restated and continue to be reported under the accounting standards in effect for those periods. No cumulative-effect adjustment to the balance sheet was necessary upon the adoption of ASC 606. The adoption of this standard did not have a material impact on the Company's consolidated financial statements. ASU 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities ("ASU 2016-01"). On January 1, 2018, the Company adopted amendments to ASC 825 - Financial Instruments pursuant to ASU 2016-01. This standard requires all equity investments (other than those accounted for under the equity method) to be measured at fair value with changes in the fair value recognized through net income. The Company recorded a $0.2 million cumulative-effect adjustment to the balance sheet upon adoption. ASU 2016-15, Classification of Certain Cash Receipts and Cash Payments ("ASU 2016-15"). On January 1, 2018, the Company adopted amendments to ASC 230 - Statement of Cash Flows ("ASC 230") on a retrospective basis pursuant to ASU 2016-15. This standard clarifies the treatment of several cash flow activities. ASU 2016-15 also clarifies that when cash receipts and cash payments have aspects of more than one classification of cash flows and cannot be separated, classification will depend on the predominant source or use. The adoption of this standard did not have a material impact on the Company's consolidated financial statements. ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash ("ASU 2016-18"). On January 1, 2018, the Company adopted amendments to ASC 230 on a retrospective basis pursuant to ASU 2016-18. This standard requires the inclusion of restricted cash with cash and cash equivalents when reconciling the beginning and ending cash on the statement of cash flows. Restricted cash includes cash pledged or on deposit with brokers of consolidated investment products. Cash, cash equivalents and restricted cash reported on the consolidated statements of cash flows now includes $0.8 million, $1.0 million and $10.4 million of cash pledged or on deposit of consolidated investment products as of December 31, 2017, 2016 and 2015, respectively, as well as previously reported cash and cash equivalents. The adoption of this standard did not have a material impact on the Company's consolidated financial statements. ASU 2017-01, Clarifying the Definition of a Business ("ASU 2017-01"). On January 1, 2018, the Company adopted amendments to ASC 805 - Business Combinations ("ASC 805") pursuant to ASU 2017-01 and will apply the standard prospectively. This standard provides guidance on evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The adoption of this standard did not have a material impact on the Company's consolidated financial statements. ASU 2017-04, Intangibles - Goodwill and Other: Simplifying the Accounting for Goodwill Impairment ("ASU 2017-04"). On January 1, 2018, the Company adopted amendments to ASC 350 - Intangibles - Goodwill and Other pursuant to ASU 2017-04 and will apply the standard prospectively for all future annual and interim goodwill impairment tests. Under ASU 2017-04, a goodwill impairment is defined to be the amount by which a reporting unit’s carrying value exceeds its fair value. The adoption of this standard did not have a material impact on the Company's consolidated financial statements. ASU 2018-05, Income Taxes (Topic 740), Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118 ("ASU 2018-05"). In March 2018, the Company adopted the amendments to ASC 740 - Income Taxes pursuant to ASU 2018-05. The standard adds various Securities and Exchange Commission ("SEC") paragraphs pursuant to the issuance of the December 2017 SEC Staff Accounting Bulletin No. 118, Income Tax Accounting Implications of the Tax Cuts and Jobs Act ("SAB 118"), which was effective immediately. The SEC issued SAB 118 to address concerns about reporting entities’ ability to comply with the accounting requirements to recognize all of the effects of the Tax Cuts and Jobs Act in the period of enactment on a timely basis. SAB 118 allows disclosure stating that timely determination of some or all of the income tax effects from the Tax Cuts and Jobs Act are incomplete by the due date of the financial statements and if possible to provide a reasonable estimate of the income tax effects. We have accounted for the tax effects of the Tax Cuts and Jobs Act under the guidance of SAB 118. The adoption of this standard did not have a material impact on the Company's consolidated financial statements. New Accounting Standards Not Yet Implemented In August 2018, the Financial Accounting Standards Board ("FASB") issued ASU 2018-15, Intangibles-Goodwill and Other- Internal-Use Software (Subtopic 350-40) ("ASU 2018-15"). This standard aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software, including an internal use software license. ASU 2018-15 is effective for fiscal years beginning after December 15, 2019 and interim periods within those fiscal years. Early adoption is permitted. The Company does not expect the adoption of this standard to have a material impact on the Company's consolidated financial statements. In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820) ("ASU 2018-13"). This standard modifies the disclosure requirements on fair value measurements and is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Early adoption is permitted. The Company is currently evaluating the potential impact of the guidance but does not expect the adoption of this standard to have a material impact on the Company's consolidated financial statements. In July 2018, the FASB issued ASU 2018-09, Codification Improvements ("ASU 2018-09"). This standard does not prescribe any new accounting guidance, but instead makes minor improvements and clarifications of several different FASB ASC areas based on comments and suggestions made by various stakeholders. Certain updates are applicable immediately while other updates provide for a transition period for adoption over the next fiscal year beginning after December 15, 2018. The Company does not expect the adoption of this standard to have a material impact on the Company's consolidated financial statements. In February 2018, the FASB issued ASU 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income ("ASU 2018-02"). The standard provides financial statement preparers with an option to reclassify stranded tax effects within accumulated other comprehensive income to retained earnings in each period in which the effect of the change in the U.S. federal corporate income tax rate in the Tax Cuts and Jobs Act (or portion thereof) is recorded. ASU 2018-02 is effective for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years. Early adoption is permitted. The Company does not expect the adoption of this guidance to have a material impact on the Company's consolidated financial statements. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) ("ASU 2016-02"). The standard replaces current codification Topic 840 - Leases with updated guidance on accounting for leases and requires a lessee to recognize assets and liabilities arising from an operating lease on the balance sheet, whereas previous guidance did not require lease assets and liabilities to be recognized for most operating leases. Furthermore, this standard permits companies to make an accounting policy election to not recognize lease assets and liabilities for leases with a term of 12 months or less. For both finance leases and operating leases, the lease liability should be initially measured at the present value of the lease payments. The recognition, measurement and presentation of expenses and cash flows arising from a lease by a lessee will not significantly change under this new guidance. In July 2018, the FASB issued ASU 2018-10, Codification Improvements to Topic 842 (Leases), which provides narrow amendments to clarify how to apply certain aspects of ASU 2016-02, allowing entities the option to instead apply the provisions of the new lease standards at the effective date without adjusting comparative periods presented. We plan to elect this optional transition method along with the practical expedients permitted under the transition guidance that will retain the lease classification and initial direct costs for any leases that exist prior to adoption of the new standards. We have substantially completed aggregating and evaluating our lease contracts. Adoption of these new lease standards is effective January 1, 2019. Upon adoption, we anticipate recording a right-of-use asset and lease liability on our consolidated balance sheet similar in magnitude to the total present value of outstanding future minimum payments for operating leases shown in Note 11. The adoption of these standards is not expected to have a material impact on our consolidated statements of operations or consolidated statements of cash flows.
Fair Value Measurements, Transfers	Transfers into and out of levels are reflected when significant inputs used for the fair value measurement, including market inputs or performance attributes, become observable or unobservable or when the Company determines it has the ability, or no longer has the ability, to redeem, in the near term, certain investments that the Company values using a net asset value, or if the book value no longer represents fair value.