Fair Value Measurements - Schedule of Changes in Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Assets
Cash equivalents	$ 340,276	$ 225,736
Investment securities - fair value
Fair Value	76,462	83,771
Debt securities	2,546	1,456
Total assets measured at fair value	436,828	324,666
Liabilities
Total liabilities measured at fair value	20,800	36,100
Contingent consideration
Liabilities
Total liabilities measured at fair value	20,800	36,100
Sponsored funds
Investment securities - fair value
Fair Value	51,013	63,296
Equity securities
Investment securities - fair value
Fair Value	22,903	19,019
Nonqualified retirement plan assets
Investment securities - fair value
Nonqualified retirement plan assets	20,090	15,159
Level 1
Assets
Cash equivalents	340,276	225,736
Investment securities - fair value
Debt securities	0	0
Total assets measured at fair value	434,282	323,210
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	51,013	63,296
Level 1 \| Equity securities
Investment securities - fair value
Fair Value	22,903	19,019
Level 1 \| Nonqualified retirement plan assets
Investment securities - fair value
Nonqualified retirement plan assets	20,090	15,159
Level 2
Assets
Cash equivalents	0	0
Investment securities - fair value
Debt securities	2,546	1,456
Total assets measured at fair value	2,546	1,456
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	20,800	36,100
Level 3 \| Contingent consideration
Liabilities
Total liabilities measured at fair value	20,800	36,100
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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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current.

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