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Fair Value Measurements (Details) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt and equity securities $ 143,126 $ 118,752
Securities owned 29,583 31,334
Assets, fair value 221,368 194,063
Contingent considerations 14,355 3,992
Total liabilities measured at fair value 14,355 3,992
Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities owned 0 0
Assets, fair value 40,530 36,661
Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities owned 29,583 31,334
Assets, fair value 172,709 150,086
Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Contingent considerations 14,355 3,992
Total liabilities measured at fair value 14,355 3,992
NAV as a Practical Expedient    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, fair value 8,129 7,316
Equity securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt and equity securities 40,530 36,661
Equity securities | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt and equity securities 40,530 36,661
Equity securities | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt and equity securities 0 0
Available-for-sale debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt and equity securities 143,126 118,752
Available-for-sale debt securities | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt and equity securities 0 0
Available-for-sale debt securities | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale debt and equity securities 143,126 118,752
Investment funds sponsored by LSV    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investment funds sponsored by LSV 8,129 7,316
Investment funds sponsored by LSV | NAV as a Practical Expedient    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investment funds sponsored by LSV $ 8,129 $ 7,316