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Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Assets |  |
Cash equivalents | $ 242,567 | $ 307,277
Investment securities - fair value |  |
Fair Value | 73,134 | 80,335
Total assets measured at fair value | 327,289 | 400,933
Liabilities |  |
Total liabilities measured at fair value | 72,980 | 88,400
Contingent Consideration Liability |  |
Liabilities |  |
Total liabilities measured at fair value | 72,980 | 88,400
Sponsored funds |  |
Investment securities - fair value |  |
Fair Value | 61,699 | 66,326
Equity securities |  |
Investment securities - fair value |  |
Fair Value | 11,435 | 14,009
Nonqualified retirement plan assets |  |
Investment securities - fair value |  |
Nonqualified retirement plan assets | 11,588 | 13,321
Level 1 |  |
Assets |  |
Cash equivalents | 242,567 | 307,277
Investment securities - fair value |  |
Total assets measured at fair value | 327,289 | 400,933
Liabilities |  |
Total liabilities measured at fair value | 0 | 0
Level 1 | Contingent Consideration Liability |  |
Liabilities |  |
Total liabilities measured at fair value | 0 | 0
Level 1 | Sponsored funds |  |
Investment securities - fair value |  |
Fair Value | 61,699 | 66,326
Level 1 | Equity securities |  |
Investment securities - fair value |  |
Fair Value | 11,435 | 14,009
Level 1 | Nonqualified retirement plan assets |  |
Investment securities - fair value |  |
Nonqualified retirement plan assets | 11,588 | 13,321
Level 2 |  |
Assets |  |
Cash equivalents | 0 | 0
Investment securities - fair value |  |
Total assets measured at fair value | 0 | 0
Liabilities |  |
Total liabilities measured at fair value | 0 | 0
Level 2 | Contingent Consideration Liability |  |
Liabilities |  |
Total liabilities measured at fair value | 0 | 0
Level 2 | Sponsored funds |  |
Investment securities - fair value |  |
Fair Value | 0 | 0
Level 2 | Equity securities |  |
Investment securities - fair value |  |
Fair Value | 0 | 0
Level 2 | Nonqualified retirement plan assets |  |
Investment securities - fair value |  |
Nonqualified retirement plan assets | 0 | 0
Level 3 |  |
Assets |  |
Cash equivalents | 0 | 0
Investment securities - fair value |  |
Total assets measured at fair value | 0 | 0
Liabilities |  |
Total liabilities measured at fair value | 72,980 | 88,400
Level 3 | Contingent Consideration Liability |  |
Liabilities |  |
Total liabilities measured at fair value | 72,980 | 88,400
Level 3 | Sponsored funds |  |
Investment securities - fair value |  |
Fair Value | 0 | 0
Level 3 | Equity securities |  |
Investment securities - fair value |  |
Fair Value | 0 | 0
Level 3 | Nonqualified retirement plan assets |  |
Investment securities - fair value |  |
Nonqualified retirement plan assets | $ 0 | $ 0

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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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