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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Net income (loss) $ 22,467 $ (10,337) $ 42,927 $ (16,819)
Other comprehensive income (loss), net of applicable taxes:        
Foreign currency translation adjustment 1,093 (286) (1,052) (83)
Unrealized (loss) gain on short-term investments (15) 10 (14) 19
Total other comprehensive income (loss) 1,078 (276) (1,066) (64)
Comprehensive income (loss) $ 23,545 $ (10,613) $ 41,861 $ (16,883)