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Condensed Consolidated Statements of Changes in Shareholders' Equity - USD ($)
$ in Thousands
Preferred Stock
Common Stock
Additional Paid-in Capital
Retained Deficit
Accumulated Other Comprehensive Loss
Total
Balance at Dec. 31, 2013   $ 775 $ 887,556 $ (130,314) $ 383 $ 758,400
Balance (in shares) at Dec. 31, 2013 8,624 77,788,393        
Increase (Decrease) in Shareholders' Equity            
Share-based compensation arrangements, net of tax benefits of $9,591 and $8,036 for the six months ended June 30, 2014 and 2015 respectively   $ 6 20,715     20,721
Share-based compensation arrangements (in shares)   839,090        
Foreign currency translation adjustment         (81) (81)
Net income       8,713   8,713
Balance at Jun. 30, 2014   $ 781 908,271 (121,601) 302 787,753
Balance (in shares) at Jun. 30, 2014 8,624 78,627,483        
Balance at Dec. 31, 2014   $ 786 918,370 (363,388) (1,282) 554,486
Balance (in shares) at Dec. 31, 2014 8,624 79,161,817        
Increase (Decrease) in Shareholders' Equity            
Share-based compensation arrangements, net of tax benefits of $9,591 and $8,036 for the six months ended June 30, 2014 and 2015 respectively   $ 9 18,021     18,030
Share-based compensation arrangements (in shares)   953,721        
Foreign currency translation adjustment         (1,177) (1,177)
Net income       27,882   27,882
Balance at Jun. 30, 2015   $ 795 $ 936,391 $ (335,506) $ (2,459) $ 599,221
Balance (in shares) at Jun. 30, 2015 8,624 80,115,538