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Earnings per Common Share - Basic Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Numerator:    
Net income $ 36,012 $ 38,624
Net income allocated to Class A common stockholders $ 36,012 $ 38,433
Denominator:    
Weighted-average Class A shares issued and outstanding (in shares) 51,813 54,556
Basic earnings per Class A common share (in usd per share) $ 0.70 $ 0.70
Numerator:    
Net income allocated to Class A common stockholders $ 36,012 $ 38,433
Re-allocated earnings 0 2
Diluted net income allocated to Class A common stockholders $ 36,012 $ 38,435
Denominator:    
Weighted-average Class A shares issued and outstanding (in shares) 51,813 54,556
Diluted weighted-average Class A shares issued and outstanding (in shares) 52,021 55,230
Diluted earnings per Class A common share (in usd per share) $ 0.69 $ 0.70
Stock options    
Denominator:    
Dilutive potential common shares (in shares) 0 214
Service-based restricted stock units    
Denominator:    
Dilutive potential common shares (in shares) 109 198
Performance-based restricted stock units    
Denominator:    
Dilutive potential common shares (in shares) 68 233
Employee stock purchase plan    
Denominator:    
Dilutive potential common shares (in shares) 31 29
Common Stock Other Than Class A Member    
Numerator:    
Net income allocated to Class A common stockholders $ 0 $ (191)
Numerator:    
Net income allocated to Class A common stockholders 0 (191)
Common Class A    
Numerator:    
Net income allocated to Class A common stockholders 36,012 38,433
Numerator:    
Net income allocated to Class A common stockholders $ 36,012 $ 38,433