Unaudited Condensed Consolidated Statement of Equity Statement - 9 months ended Sep. 30, 2016 - USD ($)
$ in Thousands
Total
Common Stock
Treasury Stock
Capital in Excess of Par Value
Accumulated Deficit
Accumulated Other Comprehensive Income (Loss)
Noncontrolling Interest
Balance at beginning of period at Dec. 31, 2015 $ 1,189,401 $ 200,859 $ (5,086) $ 1,092,106 $ (109,351) $ 6,164 $ 4,709
Stockholders' Equity [Roll Forward]              
Comprehensive income 129,004 0 0 0 110,792 18,110 102
Dividends declared on common stock (73,665) 0 0 (73,665) 0 0 0
Employee share-based compensation earned 10,199 0 0 10,199 0 0 0
Stock option exercises 16,029 1,924 0 14,105 0 0 0
Restricted stock awards, net of forfeitures 0 242 (1) (241) 0 0 0
Purchase of Company common stock (192,991) 0 (7,544) (41,264) (144,183) 0 0
Tax Benefits Related to Share-Based Awards (11,512) 0 0 (11,512) 0 0 0
Noncontrolling interest purchases (1,961) 0 0 (364)   0 (2,325)
Other 2,170 95 0 2,155 0 0 (80)
Balance at end of period at Sep. 30, 2016 $ 1,089,698 $ 203,120 $ (12,631) $ 1,015,271 $ (142,742) $ 24,274 $ 2,406