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Employee Benefits and Share-Based Compensation - Narrative (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Aug. 02, 2016
Nov. 04, 2014
The 2016 Repurchase Program            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Value of shares authorized for repurchase under stock repurchase programs (up to)         $ 50,000,000  
Remaining value of shares authorized for repurchase under stock repurchase programs $ 2,700,000   $ 2,700,000      
2014 Share Repurchase Program            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Value of shares authorized for repurchase under stock repurchase programs (up to)           $ 50,000,000
2016 and 2014 Share Repurchase Programs            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of shares repurchased (in shares) 0 0 389,300 0    
Average price of repurchased shares (in dollars per share)     $ 134.11      
Aggregate purchase price of treasury stock     $ 52,200,000      
1997 Plan | ESPP shares available for future issuance            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares purchased under ESPP (in shares)     175,000 156,000    
Weighted-average price of shares purchased (in dollars per share)     $ 66.81 $ 59.75    
Unrecognized compensation cost $ 2,500,000   $ 2,500,000      
Weighted average period of compensation cost not yet recognized     1 year 2 months 12 days      
2009 Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock options granted (in shares) 0   0      
Weighted-average fair value of options granted (in dollars per share)       $ 33.89    
Intrinsic value of options exercised $ 2,800,000 $ 16,800,000 $ 15,500,000 $ 30,800,000    
Unrecognized compensation cost of unvested stock options 24,200,000   $ 24,200,000      
2009 Plan | Stock Options            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Weighted average period of compensation cost not yet recognized     1 year 9 months 18 days      
2009 Plan | RSUs            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Weighted average period of compensation cost not yet recognized     3 years 3 months 18 days      
Unrecognized compensation cost 113,600,000   $ 113,600,000      
2009 Plan | RSAs            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Weighted average period of compensation cost not yet recognized     10 months 24 days      
Unrecognized compensation cost 1,100,000   $ 1,100,000      
2009 Plan | PSUs            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Weighted average period of compensation cost not yet recognized     1 year 4 months 24 days      
Unrecognized compensation cost $ 11,400,000   $ 11,400,000