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Consolidated Stockholders' Equity Statements (USD $)
In Thousands
Total
Common Stock [Member]
Paid-In Capital [Member]
Retained Earnings [Member]
Treasury Stock [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Beginning balance at Dec. 31, 2010 $ 638,515 $ 503 $ 595,519 $ 171,568 $ (120,156) $ (8,919)
Beginning balance, shares at Dec. 31, 2010   50,335     (3,290)  
Net income 114,345     114,345    
Foreign currency translation (4,632)         (4,632)
Adjustments to pension and postretirement liability, net of $14.0 million, $3.2 million, and $4.8 million tax, respectively (9,158)         (9,158)
Other comprehensive income (loss), net of tax (13,790)          
Exercise of stock options, net of tax withholding forfeitures 3,862   (2,214)   6,076  
Exercise of stock options, net of tax withholding forfeitures, shares         264  
Conversion of restricted stock units into common stock, net of tax withholding forfeitures (1,864)   (4,852)   2,988  
Conversion of restricted stock units into common stock, net of tax withholding forfeitures, shares         151  
Share repurchase program (50,000)       (50,000)  
Share repurchase program, shares         (1,635)  
Share-based compensation 13,031   13,031      
Dividends ($0.20 per share) (9,550)     (9,550)    
Ending balance at Dec. 31, 2011 694,549 503 601,484 276,363 (161,092) (22,709)
Ending balance, Shares at Dec. 31, 2011   50,335     (4,510)  
Net income 194,490     194,490    
Foreign currency translation (1,414)         1,053
Adjustments to pension and postretirement liability, net of $14.0 million, $3.2 million, and $4.8 million tax, respectively (8,909)         (8,909)
Other comprehensive income (loss), net of tax (7,856)          
Exercise of stock options, net of tax withholding forfeitures 737   (8,694)   9,431  
Exercise of stock options, net of tax withholding forfeitures, shares         243  
Conversion of restricted stock units into common stock, net of tax withholding forfeitures (2,456)   (11,103)   8,647  
Conversion of restricted stock units into common stock, net of tax withholding forfeitures, shares         172  
Share repurchase program (75,000)       (75,000)  
Share repurchase program, shares         (2,072)  
Share-based compensation 16,493   16,493      
Dividends ($0.20 per share) (9,097)     (9,097)    
Ending balance at Dec. 31, 2012 811,860 503 598,180 461,756 (218,014) (30,565)
Ending balance, Shares at Dec. 31, 2012   50,335     (6,167)  
Net income 103,313     103,313    
Foreign currency translation (20,720)         (20,720)
Adjustments to pension and postretirement liability, net of $14.0 million, $3.2 million, and $4.8 million tax, respectively 22,104         22,104
Other comprehensive income (loss), net of tax 1,384          
Exercise of stock options, net of tax withholding forfeitures (184)   (31,003)   30,819  
Exercise of stock options, net of tax withholding forfeitures, shares         879  
Conversion of restricted stock units into common stock, net of tax withholding forfeitures (2,815)   (7,012)   4,197  
Conversion of restricted stock units into common stock, net of tax withholding forfeitures, shares         120  
Share repurchase program (93,750)       (93,750)  
Share repurchase program, shares         (1,712)  
Share-based compensation 25,588   25,588      
Dividends ($0.20 per share) (8,855)     (8,855)    
Ending balance at Dec. 31, 2013 $ 836,541 $ 503 $ 585,753 $ 556,214 $ (276,748) $ (29,181)
Ending balance, Shares at Dec. 31, 2013   50,335     (6,880)