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Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - 3 months ended Mar. 31, 2016 - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock
Additional Paid-in Capital
Retained Earnings
Accumulated Other Comprehensive (Loss)
Beginning Balance at Dec. 31, 2015 $ 1,147,603 $ 412 $ 400,705 $ 855,481 $ (108,995)
Beginning Balance (in shares) at Dec. 31, 2015 41,234 41,234      
Net income (loss) $ 30,181     30,181  
Other comprehensive income (loss):          
Foreign currency translation adjustment (358)       (358)
Issuance of common stock in connection with:          
Exercise of options, net of income tax benefit from share-based awards of $107 (in Shares)   53      
Exercise of options, net of income tax benefit from share-based awards of $107 1,313 $ 1 1,312    
Restricted share grants, less net settled shares of 69 (in Shares)   183      
Restricted share grants, less net settled shares of 69 (2,375) $ 2 (2,377)    
Stock units issued under incentive compensation plan 1,842   1,842    
Purchase and retirement of common stock (in shares)   (85)      
Purchase and retirement of common stock (2,903) $ (1) (2,902)    
Share-based compensation 5,943   5,943    
Ending Balance at Mar. 31, 2016 $ 1,181,246 $ 414 $ 404,523 $ 885,662 $ (109,353)
Ending Balance (in shares) at Mar. 31, 2016 41,385 41,385