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Consolidated Statements Of Equity - USD ($)
$ in Thousands
Total
Common Stock
Capital Surplus
Accumulated Other Comprehensive Loss
 [1]
Retained Earnings
Treasury Stock
Noncontrolling Interests
Balance at Dec. 31, 2017 $ 1,674,117 $ 599 $ 8,005 $ (94,200) $ 1,796,556 $ (37,693) $ 850
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income including noncontrolling interests 283,577       283,531   46
Other comprehensive income (loss) 6,538     6,538      
Cumulative-effect adjustment [2] (854)       (854)    
Common stock issued under share-based compensation plans 0 1 (1)        
Tax withholding for common stock issued under share-based compensation plans (3,848)   (3,848)        
Common stock issued under employee stock purchase plan 5,765 1 5,764        
Common stock dividends (18,640)       (18,793)    
Common stock dividends, accrued dividend shares     153        
Repurchases of common stock (216,244)         (216,244)  
Share-based compensation expense 11,030   11,030        
Balance at Dec. 31, 2018 1,741,441 601 21,103 (87,662) 2,060,440 (253,937) 896
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income including noncontrolling interests 325,140       325,140   0
Other comprehensive income (loss) (1,626)     (1,626)      
Common stock issued under share-based compensation plans 0 3 (3)        
Tax withholding for common stock issued under share-based compensation plans (6,451)   (6,451)        
Common stock issued under employee stock purchase plan 6,090   6,090        
Common stock dividends (17,950)       (18,099)    
Common stock dividends, accrued dividend shares     149        
Distributions to noncontrolling interests (250)           (250)
Share-based compensation expense 11,386   11,386        
Balance at Dec. 31, 2019 2,057,780 604 32,274 (89,288) 2,367,481 (253,937) 646
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income including noncontrolling interests 132,943       132,943   0
Other comprehensive income (loss) (19,945)     (19,945)      
Cumulative-effect adjustment [3] (2,307)       (2,307)    
Common stock issued under share-based compensation plans 2 2 0        
Tax withholding for common stock issued under share-based compensation plans (2,640)   (2,640)        
Common stock issued under employee stock purchase plan 6,557   6,557        
Common stock dividends (17,674)       (17,796)    
Common stock dividends, accrued dividend shares     122        
Repurchases of common stock (112,553)         (112,553)  
Distributions to noncontrolling interests (70)           (70)
Share-based compensation expense 11,151   11,151        
Balance at Dec. 31, 2020 $ 2,053,244 $ 606 $ 47,464 $ (109,233) $ 2,480,321 $ (366,490) $ 576
[1] Represents cumulative foreign currency translation and post retirement liability adjustments of $2.9 million and $(112.1) million, respectively, as of December 31, 2020, $0.8 million and $(90.1) million, respectively, as of December 31, 2019, and $(0.9) million and $(86.8) million, respectively, as of December 31, 2018.
[2] Represents adjustment to retained earnings upon the adoption of Accounting Standards Codification Topic 606.
[3] Represents adjustment to retained earnings upon the adoption of Accounting Standards Codification Topic 326.