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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, 2015 $ 1,480,056 $ 617 $ 130,369 $ (76,953) $ 1,432,980 $ (10,302) $ 3,345
Net income including noncontrolling interests 34,354       34,348   6
Other comprehensive income 430     430      
Common stock issued under share-based compensation plans [2] 991 2 (2)   991    
Tax withholding for common stock issued under share-based compensation plans (4,097)   (4,097)        
Common stock issued under employee stock purchase plan 1,188   1,188        
Common stock dividends (4,879)       (4,939)    
Common stock dividends, accrued dividend shares     60        
Repurchase of common stock (26,076) (6) (26,070)        
Distributions to noncontrolling interests (600)           (600)
Share-based compensation expense 3,083   3,083        
Balance at Mar. 31, 2016 1,484,450 613 104,531 (76,523) 1,463,380 (10,302) 2,751
Balance at Dec. 31, 2016 1,537,942 606 52,219 (101,703) 1,596,269 (10,302) 853
Net income including noncontrolling interests 52,610       52,640   (30)
Other comprehensive income 495     495      
Common stock issued under share-based compensation plans 0 1 (1)        
Tax withholding for common stock issued under share-based compensation plans (2,637)   (2,637)        
Common stock issued under employee stock purchase plan 864   864        
Common stock dividends (4,793)       (4,839)    
Common stock dividends, accrued dividend shares     46        
Repurchase of common stock (53,307) (8) (53,299)        
Distributions to noncontrolling interests 0           0
Share-based compensation expense 2,967   2,967        
Balance at Mar. 31, 2017 $ 1,534,141 $ 599 $ 159 $ (101,208) $ 1,644,070 $ (10,302) $ 823
[1] Represents cumulative foreign currency translation adjustments and post retirement liability adjustments.
[2] Includes a $1.0 million adjustment to retained earnings to recognize net operating loss carryforwards attributable to excess tax benefits on stock compensation upon the adoption of Accounting Standards Update No. 2016-09.