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Fair Value Measurements - Summary of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Financial Liabilities    
Contingent consideration arrangements $ (239,300) $ (230,400)
Fair Value on Recurring Basis    
Financial Assets    
Money market funds 31,771 24,575
Investments in proprietary funds 506 466
Deferred compensation plan investments 29,485 26,800
Interest rate swap asset 45,387 46,931
Total Financial Assets 107,149 98,772
Financial Liabilities    
Contingent consideration arrangements (239,300) (230,400)
Total Financial Liabilities (239,300) (230,400)
Fair Value on Recurring Basis | Level 1    
Financial Assets    
Money market funds 31,771 24,575
Investments in proprietary funds 506 466
Deferred compensation plan investments 29,485 26,800
Total Financial Assets 61,762 51,841
Fair Value on Recurring Basis | Level 2    
Financial Assets    
Interest rate swap asset 45,387 46,931
Total Financial Assets 45,387 46,931
Fair Value on Recurring Basis | Level 3    
Financial Liabilities    
Contingent consideration arrangements (239,300) (230,400)
Total Financial Liabilities $ (239,300) $ (230,400)