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Consolidated Statements of Stockholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Common Stock
Treasury Stock
Additional Paid-in Capital
Retained Earnings (Accumulated Deficit)
Accumulated Other Comprehensive Income
Total
Balance at Dec. 31, 2012 $ 393   $ 708,723 $ 96,123 $ 5,973 $ 811,212
Balance (in shares) at Dec. 31, 2012 39,328          
Increase (Decrease) in Stockholders' Equity            
Net loss       (42,263)   (42,263)
Other comprehensive loss, net of tax         (1,352) (1,352)
Share-based compensation expense     13,130     13,130
Net issuance under employee stock plans $ 4   (501)     (497)
Net issuance under employee stock plans (in shares) 338          
Balance at Dec. 31, 2013 $ 397   721,352 53,860 4,621 780,230
Balance (in shares) at Dec. 31, 2013 39,666          
Increase (Decrease) in Stockholders' Equity            
Net loss       (66,940)   (66,940)
Other comprehensive loss, net of tax         (3,152) (3,152)
Share-based compensation expense     18,813     18,813
Net issuance under employee stock plans $ 7   9,974     9,981
Net issuance under employee stock plans (in shares) 694          
Balance at Dec. 31, 2014 $ 404   750,139 (13,080) 1,469 738,932
Balance (in shares) at Dec. 31, 2014 40,360          
Increase (Decrease) in Stockholders' Equity            
Net loss       (31,978)   (31,978)
Other comprehensive loss, net of tax         (121) (121)
Share-based compensation expense     17,986     17,986
Net issuance under employee stock plans $ 6   (988)     (982)
Net issuance under employee stock plans (in shares) 636          
Purchases of common stock   $ (9,222)       $ (9,222)
Purchase of common stock (in shares)   469       500
Balance at Dec. 31, 2015 $ 410 $ (9,222) $ 767,137 $ (45,058) $ 1,348 $ 714,615
Balance (in shares) at Dec. 31, 2015 40,996 469