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Consolidated Statements of Changes in Equity - USD ($)
$ in Thousands
Total
Common Stock
Capital In Excess of Par Value
Retained Earnings
Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Dec. 31, 2020   143,396,000      
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Purchase and retirement of common stock (in shares)   (6,747,000)      
Issuance of common stock under the employee stock purchase plan (in shares)   81,000      
Issuance of common stock under share-based award plans (in shares)   1,719,000      
Ending balance (in shares) at Dec. 31, 2021   138,449,000      
Beginning balance at Dec. 31, 2020   $ 1,434 $ 1,190,001 $ 565,270 $ (16,798)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Purchase and retirement of common stock   (67) (40,058) (371,409)  
Issuance of common stock under the employee stock purchase plan   0 4,115    
Issuance of common stock under share-based award plans   17 51,099    
Stock-based compensation     41,451    
Net income $ 546,593     546,593  
Dividends declared ($0.89, $0.83 and $0.77 per share) (107,840)     (107,840)  
Other comprehensive income (loss) (3,045)       (3,045)
Ending balance at Dec. 31, 2021 $ 1,860,763 $ 1,384 1,246,608 632,614 (19,843)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Purchase and retirement of common stock (in shares)   (5,914,000)      
Issuance of common stock under the employee stock purchase plan (in shares)   90,000      
Issuance of common stock under share-based award plans (in shares)   1,537,000      
Ending balance (in shares) at Dec. 31, 2022 134,162,002 134,162,000      
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Purchase and retirement of common stock   $ (58) (37,019) (301,365)  
Issuance of common stock under the employee stock purchase plan   1 4,340    
Issuance of common stock under share-based award plans   15 53,830    
Stock-based compensation     39,403    
Net income $ 475,467     475,467  
Dividends declared ($0.89, $0.83 and $0.77 per share) (112,429)     (112,429)  
Other comprehensive income (loss) (29,124)       (29,124)
Ending balance at Dec. 31, 2022 $ 1,953,824 $ 1,342 1,307,162 694,287 (48,967)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Purchase and retirement of common stock (in shares)   (5,237,000)      
Issuance of common stock under the employee stock purchase plan (in shares)   85,000      
Issuance of common stock under share-based award plans (in shares)   2,168,000      
Ending balance (in shares) at Dec. 31, 2023 131,177,513 131,178,000      
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Purchase and retirement of common stock   $ (52) (34,652) (276,065)  
Issuance of common stock under the employee stock purchase plan   1 4,273    
Issuance of common stock under share-based award plans   21 96,871    
Stock-based compensation     31,308    
Net income $ 462,258     462,258  
Dividends declared ($0.89, $0.83 and $0.77 per share) (117,894)     (117,894)  
Other comprehensive income (loss) 11,935       11,935
Ending balance at Dec. 31, 2023 $ 2,131,828 $ 1,312 $ 1,404,962 $ 762,586 $ (37,032)