Fair Value Measurements - Schedule of Changes in Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Assets
Cash equivalents	$ 99,963	$ 340,276
Investment securities - fair value
Fair value	53,460	76,462
Debt securities	2,881	2,546
Total assets measured at fair value	180,979	436,828
Liabilities
Total liabilities measured at fair value	118,344	20,800
Contingent consideration
Liabilities
Total liabilities measured at fair value	118,344	20,800
Sponsored funds
Investment securities - fair value
Fair value	29,130	51,013
Equity securities
Investment securities - fair value
Fair value	21,449	22,903
Nonqualified retirement plan assets
Investment securities - fair value
Nonqualified retirement plan assets	27,556	20,090
Level 1
Assets
Cash equivalents	99,963	340,276
Investment securities - fair value
Debt securities	0	0
Total assets measured at fair value	178,098	434,282
Liabilities
Total liabilities measured at fair value	0	0
Level 1 \| Contingent consideration
Liabilities
Total liabilities measured at fair value	0	0
Level 1 \| Sponsored funds
Investment securities - fair value
Fair value	29,130	51,013
Level 1 \| Equity securities
Investment securities - fair value
Fair value	21,449	22,903
Level 1 \| Nonqualified retirement plan assets
Investment securities - fair value
Nonqualified retirement plan assets	27,556	20,090
Level 2
Assets
Cash equivalents	0	0
Investment securities - fair value
Debt securities	2,881	2,546
Total assets measured at fair value	2,881	2,546
Liabilities
Total liabilities measured at fair value	0	0
Level 2 \| Contingent consideration
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
Debt securities	0	0
Total assets measured at fair value	0	0
Liabilities
Total liabilities measured at fair value	118,344	20,800
Level 3 \| Contingent consideration
Liabilities
Total liabilities measured at fair value	118,344	20,800
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

Fair value portion of asset recognized for present right to economic benefit.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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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.

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Fair value of financial and nonfinancial obligations.

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Investments In Nonqualified Retirement Plan Assets

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