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CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (USD $)
In Thousands, unless otherwise specified
Total
Accumulated Deficit [Member]
Common Stock [Member]
Additional Paid-in Capital [Member]
Treasury Stock [Member]
Balance at Dec. 31, 2013 $ 284,661 $ (539,597) $ 2,155 $ 822,103 $ 0
Balance (in shares) at Dec. 31, 2013     21,553   4
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income 23,971 23,971      
Stock options exercised, net 573   2 (338) 909
Stock options exercised, net (in shares)     (18)   (51)
Issuance of restricted stock, net 51     (122) 173
Issuance of restricted stock, net (in shares)         (8)
Stock-based compensation expense 1,407     1,407  
Repurchase of common stock (25,036)       (25,036)
Repurchase of common stock (in shares)         1,194
Conversion of 2014 Debentures to common stock 29     29  
Conversion of 2014 Debentures to common stock (in shares)     2    
Balance at Jun. 30, 2014 $ 285,656 $ (515,626) $ 2,157 $ 823,079 $ (23,954)
Balance (in shares) at Jun. 30, 2014     21,573   1,139