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Employee Compensation and Benefit Plans - Schedule of Stock Unit Activity (Footnote) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Chief Executive Officer        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Granted (in shares) 147,058 115,173 150,000  
Stock Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Granted (in shares) 373,614 236,593 150,000  
Intrinsic value of stock units vested $ 2.2 $ 2.1 $ 1.0  
Total intrinsic value of stock units vested $ 2.5 $ 2.4 $ 2.7  
Unvested stock units (in shares) 603,889 416,226 261,647 177,275
Weighted average remaining contractual term of share units outstanding (years) 2 years 1 month 6 days      
Market-based Stock Awards        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unvested stock units (in shares) 327,603      
Net aggregate intrinsic value of stock awards outstanding $ 8.5      
Equity-Settled Awards        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Granted (in shares) 57,187      
Share-Based Payments Arrangement, Tranche Five | Market-based Stock Awards        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock units with market condition not met, number 327,603      
Over Three Years | Equity-Settled Awards        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Granted (in shares) 5,641      
Over Four Years | Equity-Settled Awards        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Granted (in shares) 51,546