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Common Stock (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Apr. 30, 2021
Apr. 30, 2020
Mar. 31, 2020
Oct. 31, 2016
Class of Stock [Line Items]                
Dividends paid   $ 105,764 $ 207,765 $ 109,147        
Special dividends paid $ 99,300              
Special dividend paid (usd per share) $ 1.00              
Amount paid for repurchase of common stock   $ 239,728 $ 67,905 $ 15,740        
Treasury Stock                
Class of Stock [Line Items]                
Purchase of treasury stock (in shares)   7,145,838 2,940,267 614,077        
Amount paid for repurchase of common stock   $ 239,728 $ 67,905 $ 15,740        
Other Current Liabilities                
Class of Stock [Line Items]                
Accrued in other current liabilities   $ 12,500            
Class B                
Class of Stock [Line Items]                
Number of shares authorized under share repurchase program (in shares)   7,500,000     4,000,000 3,500,000 500,000 4,000,000
Remaining number of shares authorized to be repurchased (in shares)   6,100,000            
Class B | Treasury Stock                
Class of Stock [Line Items]                
Purchase of treasury stock (in shares)   7,100,000