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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 89,709       89,728   (19)
Other comprehensive income 152     152      
Common stock issued under share-based compensation plans [2] 1,135 3 141   991    
Tax withholding for common stock issued under share-based compensation plans (4,111)   (4,111)        
Common stock issued under employee stock purchase plan 2,383   2,383        
Common stock dividends (9,734)       (9,836)    
Common stock dividends, accrued dividend shares     102        
Repurchase of common stock (26,076) (6) (26,070)        
Distributions to noncontrolling interests (2,050)           (2,050)
Share-based compensation expense 5,035   5,035        
Balance at Jun. 30, 2016 1,536,499 614 107,849 (76,801) 1,513,863 (10,302) 1,276
Balance at Dec. 31, 2016 1,537,942 606 52,219 (101,703) 1,596,269 (10,302) 853
Net income including noncontrolling interests 109,398       109,398   0
Other comprehensive income 543     543      
Common stock issued under share-based compensation plans 1 2 (1)        
Tax withholding for common stock issued under share-based compensation plans (3,354)   (3,354)        
Common stock issued under employee stock purchase plan 2,191   2,191        
Common stock dividends (9,531)       (9,615)    
Common stock dividends, accrued dividend shares     84        
Repurchase of common stock (63,430) (10) (55,646)   (7,774)    
Distributions to noncontrolling interests 0           0
Share-based compensation expense 5,169   5,169        
Balance at Jun. 30, 2017 $ 1,578,929 $ 598 $ 662 $ (101,160) $ 1,688,278 $ (10,302) $ 853
[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.