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Compensation and Benefits - Components of expense (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Salaries, incentive compensation and benefits $ 115,550 $ 127,195
Restricted share-based award compensation expense 8,978 10,088
Long-term incentive compensation expense 15,962 12,737
Compensation and benefits 131,512 139,932
Deferred Bonus    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Long-term cash incentive compensation expense $ 6,984 $ 2,649