CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (USD $)
In Thousands, unless otherwise specified
Total
Common Stock
Treasury Stock
Additional Capital
Accumulated Other Comprehensive Loss
Accumulated Deficit
Comprehensive Income
Balance at Dec. 31, 2011 $ 507,786 $ 29 $ (35,548) $ 626,398 $ (3,781) $ (79,312)  
Balance (in shares) at Dec. 31, 2011   28,707 (1,504)        
Increase (Decrease) in Stockholders' Equity              
Common stock issued on exercise of stock options 42     42      
Common stock issued on exercise of stock options (in shares)   6          
Common stock issued under employee stock purchase plan 83     83      
Common stock issued under employee stock purchase plan (in shares)   8          
Common stock issued on vesting of restricted stock (in shares)   3          
Common stock issued in purchase of Peer 39 3,314     3,314      
Common stock issued in purchase of Peer 39 (in shares)   357          
Share-based compensation 9,377     9,377      
Comprehensive income:              
Foreign currency translation adjustment (156)       (156)   (156)
Unrealized loss on derivatives, net of tax (174)       (174)   (174)
Unrealized loss on available for sale securities, net of tax (3)       (3)   (3)
Net income 717         717 717
Total comprehensive income 384           384
Balance at Jun. 30, 2012 $ 520,986 $ 29 $ (35,548) $ 639,214 $ (4,114) $ (78,595)  
Balance (in shares) at Jun. 30, 2012   29,081 (1,504)