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Consolidated Statements of Stockholders' Equity (USD $)
In Thousands, unless otherwise specified
Total
Common Stock [Member]
Additional Paid-In Capital [Member]
Common Stock Held In Treasury [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Dec. 31, 2010 $ 1,694,416 $ 145 $ 1,221,301 $ (1,626,856) $ 2,099,339 $ 487
Balance, shares at Dec. 31, 2010   145,121   50,474    
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 72,120       72,120  
Other comprehensive income (loss) 16,145         16,145
Exercise of stock options and vesting of restricted stock units, shares   1,683        
Exercise of stock options and vesting of restricted stock units 28,320 2 28,318      
Share-based compensation expense 27,602   27,602      
Tax benefit (detriment) related to equity compensation plans 816   816      
Repurchases of common stock, shares       (14,373)    
Repurchases of common stock (396,273)     (396,273)    
Balance at Dec. 31, 2011 1,443,146 147 1,278,037 (2,023,129) 2,171,459 16,632
Balance, shares at Dec. 31, 2011   146,804   64,847    
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 122,063       122,063  
Other comprehensive income (loss) 10,352         10,352
Exercise of stock options and vesting of restricted stock units, shares   1,923        
Exercise of stock options and vesting of restricted stock units 16,942 2 16,940      
Share-based compensation expense 28,893   28,893      
Tax benefit (detriment) related to equity compensation plans 5,130   5,130      
Repurchases of common stock, shares       (2,579)    
Repurchases of common stock (69,496)     (69,496)    
Balance at Dec. 31, 2012 1,557,030 149 1,329,000 (2,092,625) 2,293,522 26,984
Balance, shares at Dec. 31, 2012   148,727   67,426    
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 170,126       170,126  
Other comprehensive income (loss) (59,851)         (59,851)
Exercise of stock options and vesting of restricted stock units, shares   1,497        
Exercise of stock options and vesting of restricted stock units 20,071 1 20,070      
Share-based compensation expense 29,930   29,930      
Tax benefit (detriment) related to equity compensation plans (1,376)   (1,376)      
Repurchases of common stock, shares       (3,278)    
Repurchases of common stock (87,119)     (87,119)    
Balance at Dec. 31, 2013 $ 1,628,811 $ 150 $ 1,377,624 $ (2,179,744) $ 2,463,648 $ (32,867)
Balance, shares at Dec. 31, 2013   150,224   70,704