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Fair Value Measurements - Classes of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Financial Assets |  |
Investments—Consolidated Investment Companies | $ 91,359 | $ 64,526
Investments—Affiliates and Other | 45,593 | 26,935
Fair Value, Measurements, Recurring |  |
Financial Assets |  |
Cash and Cash Equivalents | 301,819 | 249,174
Investments—Consolidated Investment Companies | 91,359 | 64,526
Investments—Affiliates and Other | 45,593 | 26,935
Other | 14,331 | 6,078
Total Financial Assets | 453,102 | 346,713
Financial Liabilities |  |
Total Financial Liabilities | 12,985 | 2,087
Fair Value, Measurements, Recurring | Level 1 |  |
Financial Assets |  |
Cash and Cash Equivalents | 301,819 | 249,174
Investments—Consolidated Investment Companies | 13,622 | 7,245
Investments—Affiliates and Other | 40,010 | 23,667
Other | 9,188 | 2,901
Total Financial Assets | 364,639 | 282,987
Financial Liabilities |  |
Total Financial Liabilities | 0 | 6
Fair Value, Measurements, Recurring | Level 2 |  |
Financial Assets |  |
Cash and Cash Equivalents | 0 | 0
Investments—Consolidated Investment Companies | 77,737 | 57,281
Investments—Affiliates and Other | 5,247 | 2,945
Other | 5,143 | 3,177
Total Financial Assets | 88,127 | 63,403
Financial Liabilities |  |
Total Financial Liabilities | 89 | 0
Fair Value, Measurements, Recurring | Level 3 |  |
Financial Assets |  |
Cash and Cash Equivalents | 0 | 0
Investments—Consolidated Investment Companies | 0 | 0
Investments—Affiliates and Other | 336 | 323
Other | 0 | 0
Total Financial Assets | 336 | 323
Financial Liabilities |  |
Total Financial Liabilities | $ 12,896 | $ 2,081

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
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- Definition Fair value of financial obligations, including, but not limited to, debt instruments, derivative liabilities, federal funds purchased and sold under agreements to repurchase, securities loaned or sold under agreements to repurchase, financial instruments sold not yet purchased, guarantees, line of credit, loans and notes payable, servicing liability, and trading liabilities. + References No definition available. + Details
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