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Condensed Consolidated Statements of Changes in Shareholders' Equity (USD $)
In Thousands, except Share data, unless otherwise specified
Total
USD ($)
Preferred Stock
Common Stock
USD ($)
Additional Paid-In Capital
USD ($)
Retained Deficit
USD ($)
Accumulated Other Comprehensive Income (Loss)
USD ($)
Balance at Dec. 31, 2012 $ 2,250,929   $ 769 $ 1,451,965 $ 795,173 $ 3,022
Balance (in shares) at Dec. 31, 2012   12,275 77,446,601      
Increase (Decrease) in Shareholders' Equity            
Repurchase of preferred stock (22,275)     (22,275)    
Repurchase of preferred stock (in shares)   (225)        
Stock option activity, including tax benefit of $7300 and $2717 for three months ended March 31, 2014 and 2013, respectively 24,737   5 24,732    
Stock option activity, (in shares)     540,567      
Restricted stock activity, including tax benefit of $749 and $452 for the three months ended March 31, 2014 and 2013, respectively 442     442    
Restricted stock activity, (in shares)     188,013      
Change in fair value of corporate debt securities (99)         (99)
Foreign currency translation adjustment (391)         (391)
Net income 65,271       65,271  
Balance at Mar. 31, 2013 2,318,614   774 1,454,864 860,444 2,532
Balance (in shares) at Mar. 31, 2013   12,050 78,175,181      
Balance at Dec. 31, 2013 758,400   775 887,556 (130,314) 383
Balance (in shares) at Dec. 31, 2013   8,624 77,788,393      
Increase (Decrease) in Shareholders' Equity            
Stock option activity, including tax benefit of $7300 and $2717 for three months ended March 31, 2014 and 2013, respectively 15,486   8 15,478    
Stock option activity, (in shares)     813,456      
Restricted stock activity, including tax benefit of $749 and $452 for the three months ended March 31, 2014 and 2013, respectively 426   (3) 429    
Restricted stock activity, (in shares)     (46,734)      
Foreign currency translation adjustment (700)         (700)
Net income 4,537       4,537  
Balance at Mar. 31, 2014 $ 778,149   $ 780 $ 903,463 $ (125,777) $ (317)
Balance (in shares) at Mar. 31, 2014   8,624 78,555,115