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Fair Value Measurements - Change in Level 3 Fair Values of Contingent Purchase Price Liabilities (Details) - USD ($)
shares in Thousands, $ in Thousands
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Net expense $ 434 $ 630
Cash settlement paid $ 30,957 $ 28,434
Shares issued (number) 60 70
Contingent Purchase Price Liabilities | Level 3    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance $ (114,946) $ (132,010)
Additions from business acquisitions (13,522) (24,840)
Settlement of contingent purchase price liabilities 34,716 31,724
Change in fair value of contingencies 70 (10)
Change in net present value of contingencies (504) (620)
Ending balance $ (94,186) $ (125,756)