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Condensed Consolidated Statements Of Equity - USD ($)
$ in Thousands
Total
Common Stock [Member]
Capital Surplus [Member]
Accumulated Other Comprehensive (Loss) Income [Member]
 [1]
Retained Earnings [Member]
Treasury Stock [Member]
Noncontrolling Interests [Member]
Balance at Dec. 31, 2017 $ 1,674,117 $ 599 $ 8,005 $ (94,200) $ 1,796,556 $ (37,693) $ 850
Net income including noncontrolling interests 126,190       126,190   0
Other comprehensive (loss) income 600     600      
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 (3,745)   (3,745)        
Common stock issued under employee stock purchase plan 2,758   2,758        
Common stock dividends (9,381)       (9,462)    
Common stock dividends, accrued dividend shares     81        
Repurchase of common stock (60,508)         60,508  
Share-based compensation expense 5,956   5,956        
Balance at Jun. 30, 2018 1,735,133 600 13,054 (93,600) 1,912,430 (98,201) 850
Balance at Mar. 31, 2018 1,691,666 600 9,386 (93,320) 1,846,328 (72,178) 850
Net income including noncontrolling interests 70,816       70,816   0
Other comprehensive (loss) income (280)     (280)      
Tax withholding for common stock issued under share-based compensation plans (478)   (478)        
Common stock issued under employee stock purchase plan 1,421   1,421        
Common stock dividends (4,677)       (4,714)    
Common stock dividends, accrued dividend shares     37        
Repurchase of common stock (26,023)         26,023  
Share-based compensation expense 2,688   2,688        
Balance at Jun. 30, 2018 1,735,133 600 13,054 (93,600) 1,912,430 (98,201) 850
Balance at Dec. 31, 2018 1,741,441 601 21,103 (87,662) 2,060,440 (253,937) 896
Net income including noncontrolling interests 156,382       156,382   0
Other comprehensive (loss) income 766     766      
Common stock issued under share-based compensation plans 0 2 (2)        
Tax withholding for common stock issued under share-based compensation plans (3,735)   (3,735)        
Common stock issued under employee stock purchase plan 2,969   2,969        
Common stock dividends (8,967)       (9,047)    
Common stock dividends, accrued dividend shares     80        
Repurchase of common stock 0         0  
Distributions to noncontrolling interests (250)           (250)
Share-based compensation expense 6,225   6,225        
Balance at Jun. 30, 2019 1,894,831 603 26,640 (86,896) 2,207,775 (253,937) 646
Balance at Mar. 31, 2019 1,811,622 602 22,291 (86,516) 2,128,326 (253,937) 856
Net income including noncontrolling interests 83,972       83,972   0
Other comprehensive (loss) income (380)     (380)      
Common stock issued under share-based compensation plans 0 1 (1)        
Common stock issued under employee stock purchase plan 1,646   1,646        
Common stock dividends (4,487)       (4,523)    
Common stock dividends, accrued dividend shares     36        
Repurchase of common stock 0         0  
Distributions to noncontrolling interests (210)           (210)
Share-based compensation expense 2,668   2,668        
Balance at Jun. 30, 2019 $ 1,894,831 $ 603 $ 26,640 $ (86,896) $ 2,207,775 $ (253,937) $ 646
[1]
Represents cumulative foreign currency translation adjustments and post retirement liability adjustments.
[2]
Represents adjustment to retained earnings upon the adoption of Accounting Standards Codification Topic 606, “Revenue from Contracts with Customers.”