Basis of Presentation and Significant Accounting Policies (Policies)	6 Months Ended
Jun. 30, 2021
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information. Accordingly, they do not include all of the information and notes required by GAAP for complete financial statements. In the opinion of management, these financial statements contain all adjustments, consisting only of normal recurring adjustments, necessary for a fair statement of the Company’s financial condition and results of operations. Operating results for the six months ended June 30, 2021 are not necessarily indicative of the results that may be expected for the year ending December 31, 2021. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020 ("2020 Annual Report on Form 10-K") filed with the Securities and Exchange Commission (the "SEC"). The Company’s significant accounting policies, which have been consistently applied, are summarized in its 2020 Annual Report on Form 10-K.
New Accounting Standards Implemented	New Accounting Standards Implemented In January 2020, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2020-01, Investments-Equity Securities (Topic 321), Investments-Equity Method and Joint Ventures (Topic 323), and Derivatives and Hedging (Topic 815). This standard clarifies the interaction of the accounting for equity securities under Topic 321, the accounting for equity method investments in Topic 323 and the accounting for certain forward contracts and purchased options in Topic 815. The Company adopted this standard on January 1, 2021. The adoption of this standard did not have a material impact on the Company's condensed consolidated financial statements. In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. This standard simplifies the accounting for income taxes by removing certain exceptions to the general principles of Topic 740, Income Taxes, and improves consistent application by clarifying and amending existing guidance. The Company adopted this standard on January 1, 2021. The adoption of this standard did not have a material impact on the Company's condensed consolidated financial statements.
Fair Value Measurements	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 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 is determined based on the official closing price on the exchange on which they are traded and are categorized as Level 1. Equity securities represent securities traded on active markets and are valued at the official closing price (typically the last sale or bid) on the exchange on which the securities are primarily traded and are categorized as Level 1. Debt securities represent investments in senior secured bank loans and are based on evaluated quotations received from independent pricing services and are categorized as Level 2. 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. Cash equivalents represent investments in money market funds. Cash investments in 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 CIP. 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- U.S. 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 and equity securities that are not widely traded, are illiquid or are priced by dealers based on pricing models used by market makers in the security. Derivative assets and liabilities represent futures contracts, swaps contracts, option contracts and forward contracts held in CIP. Derivative instruments in an asset position are classified as other assets of CIP on the Condensed Consolidated Balance Sheets. Derivative instruments in a liability position are classified as liabilities of CIP within the Condensed Consolidated Balance Sheets. The change in fair value of such derivatives is recorded in realized and unrealized gain (loss) on investments of CIP, net, on the Condensed Consolidated Statements of Operations. Depending on the nature of the inputs, these derivative assets and liabilities are classified as Level 1, 2 or 3 within the fair value measurement hierarchy. In connection with entering into these derivative contracts, these CIP may be required to pledge an amount of cash equal to the appropriate "initial margin" requirements. The cash pledged or on deposit is recorded on the Condensed Consolidated Balance Sheets of the Company as Cash pledged or on deposit of CIP. The fair value of such derivatives at December 31, 2020, was immaterial. There were no derivative assets or liabilities held at June 30, 2021. Notes payable represent notes issued by CIP 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 (i) the fair value of the beneficial interests held by the Company and (ii) 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. Short sales are transactions in which a security is sold that is not owned or is owned but there is no intention to deliver, in anticipation that the price of the security will decline. Short sales are recorded on the Condensed Consolidated Balance Sheets within other liabilities of CIP and are classified as Level 1 based on the underlying equity security.
Nonconsolidated VIEs	Nonconsolidated VIEs 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 of, 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 since (i) 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, (ii) 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 CDOs' expected losses or receive more than an insignificant amount of the CDOs' expected residual return, and (iii) 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 VIEs that the Company does not consolidate as it is not the primary beneficiary since 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.

Basis of Presentation and Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2021

The unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information. Accordingly, they do not include all of the information and notes required by GAAP for complete financial statements. In the opinion of management, these financial statements contain all adjustments, consisting only of normal recurring adjustments, necessary for a fair statement of the Company’s financial condition and results of operations. Operating results for the six months ended June 30, 2021 are not necessarily indicative of the results that may be expected for the year ending December 31, 2021.

These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020 ("2020 Annual Report on Form 10-K") filed with the Securities and Exchange Commission (the "SEC"). The Company’s significant accounting policies, which have been consistently applied, are summarized in its 2020 Annual Report on Form 10-K.

New Accounting Standards Implemented

In January 2020, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2020-01, Investments-Equity Securities (Topic 321), Investments-Equity Method and Joint Ventures (Topic 323), and Derivatives and Hedging (Topic 815). This standard clarifies the interaction of the accounting for equity securities under Topic 321, the accounting for equity method investments in Topic 323 and the accounting for certain forward contracts and purchased options in Topic 815. The Company adopted this standard on January 1, 2021. The adoption of this standard did not have a material impact on the Company's condensed consolidated financial statements.

In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. This standard simplifies the accounting for income taxes by removing certain exceptions to the general principles of Topic 740, Income Taxes, and improves consistent application by clarifying and amending existing guidance. The Company adopted this standard on January 1, 2021. The adoption of this standard did not have a material impact on the Company's condensed consolidated financial statements.

Fair Value Measurements

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 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 is determined based on the official closing price on the exchange on which they are traded and are categorized as Level 1.

Equity securities represent securities traded on active markets and are valued at the official closing price (typically the last sale or bid) on the exchange on which the securities are primarily traded and are categorized as Level 1.

Debt securities represent investments in senior secured bank loans and are based on evaluated quotations received from independent pricing services and are categorized as Level 2.

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.

Cash equivalents represent investments in money market funds. Cash investments in 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 CIP. 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-

U.S. 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 and equity securities that are not widely traded, are illiquid or are priced by dealers based on pricing models used by market makers in the security.

Derivative assets and liabilities represent futures contracts, swaps contracts, option contracts and forward contracts held in CIP. Derivative instruments in an asset position are classified as other assets of CIP on the Condensed Consolidated Balance Sheets. Derivative instruments in a liability position are classified as liabilities of CIP within the Condensed Consolidated Balance Sheets. The change in fair value of such derivatives is recorded in realized and unrealized gain (loss) on investments of CIP, net, on the Condensed Consolidated Statements of Operations. Depending on the nature of the inputs, these derivative assets and liabilities are classified as Level 1, 2 or 3 within the fair value measurement hierarchy. In connection with entering into these derivative contracts, these CIP may be required to pledge an amount of cash equal to the appropriate "initial margin" requirements. The cash pledged or on deposit is recorded on the Condensed Consolidated Balance Sheets of the Company as Cash pledged or on deposit of CIP. The fair value of such derivatives at December 31, 2020, was immaterial. There were no derivative assets or liabilities held at June 30, 2021.

Notes payable represent notes issued by CIP 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 (i) the fair value of the beneficial interests held by the Company and (ii) 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.

Short sales are transactions in which a security is sold that is not owned or is owned but there is no intention to deliver, in anticipation that the price of the security will decline. Short sales are recorded on the Condensed Consolidated Balance Sheets within other liabilities of CIP and are classified as Level 1 based on the underlying equity security.

Nonconsolidated VIEs

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 of, 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 since (i) 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, (ii) 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 CDOs' expected losses or receive more than an insignificant amount of the CDOs' expected residual return, and (iii) 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 VIEs that the Company does not consolidate as it is not the primary beneficiary since 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.