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Fair Value Measurements - Classes of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Financial Assets |  |
Cash and Cash Equivalents | $ 308,349 | $ 249,174
Investments—Consolidated Investment Companies |  |
Equity Securities | 18,435 | 25,628
Debt Securities | 28,727 | 38,898
Investments—Affiliates and Other |  |
Equity Securities | 20,768 | 24,014
Debt Securities | 4,731 | 2,921
Other | 8,910 | 6,078
Total Financial Assets | 389,920 | 346,713
Financial Liabilities |  |
Total Financial Liabilities | 13,700 | 2,087
Level 1 |  |
Financial Assets |  |
Cash and Cash Equivalents | 308,349 | 249,174
Investments—Consolidated Investment Companies |  |
Equity Securities | 6,266 | 7,245
Debt Securities | 0 | 0
Investments—Affiliates and Other |  |
Equity Securities | 20,662 | 23,667
Debt Securities | 0 | 0
Other | 8,666 | 2,901
Total Financial Assets | 343,943 | 282,987
Financial Liabilities |  |
Total Financial Liabilities | 557 | 6
Level 2 |  |
Financial Assets |  |
Cash and Cash Equivalents | 0 | 0
Investments—Consolidated Investment Companies |  |
Equity Securities | 12,169 | 18,383
Debt Securities | 28,727 | 38,898
Investments—Affiliates and Other |  |
Equity Securities | 75 | 335
Debt Securities | 4,431 | 2,610
Other | 244 | 3,177
Total Financial Assets | 45,646 | 63,403
Financial Liabilities |  |
Total Financial Liabilities | 1,418 | 0
Level 3 |  |
Financial Assets |  |
Cash and Cash Equivalents | 0 | 0
Investments—Consolidated Investment Companies |  |
Equity Securities | 0 | 0
Debt Securities | 0 | 0
Investments—Affiliates and Other |  |
Equity Securities | 31 | 12
Debt Securities | 300 | 311
Other | 0 | 0
Total Financial Assets | 331 | 323
Financial Liabilities |  |
Total Financial Liabilities | $ 11,725 | $ 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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