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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 55,374       55,374   0
Other comprehensive income 880     880      
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 (3,267)   (3,267)        
Common stock issued under employee stock purchase plan 1,337   1,337        
Common stock dividends (4,704)       (4,748)    
Common stock dividends, accrued dividend shares     44        
Repurchase of common stock (34,485)         34,485  
Share-based compensation expense 3,268   3,268        
Balance at Mar. 31, 2018 1,691,666 600 9,386 (93,320) 1,846,328 (72,178) 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 72,410       72,410   0
Other comprehensive income 1,146     1,146      
Common stock issued under share-based compensation plans 0 1 (1)        
Tax withholding for common stock issued under share-based compensation plans (3,735)   (3,735)        
Common stock issued under employee stock purchase plan 1,323   1,323        
Common stock dividends (4,480)       (4,524)    
Common stock dividends, accrued dividend shares     44        
Distributions to noncontrolling interests (40)           (40)
Share-based compensation expense 3,557   3,557        
Balance at Mar. 31, 2019 $ 1,811,622 $ 602 $ 22,291 $ (86,516) $ 2,128,326 $ (253,937) $ 856
[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.