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Condensed Consolidated Statements of Comprehensive (Loss) Income (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Condensed Consolidated Statements of Comprehensive (Loss) Income        
Net (loss) income $ (6,026) $ 11,753 $ (20,178) $ 39,983
Available-for-sale securities        
Unrealized gain (loss) on available-for-sale securities 225 122 (15) (129)
(Provision) benefit for income taxes (54) (14) 25 53
Less: Reclassification adjustments for gains included in net (loss) income (1) (11) (52) (20)
Net unrealized gain (loss) on available-for-sale securities 170 97 (42) (96)
Foreign currency translation        
Foreign currency translation (273) 248 (1,346) (27)
Benefit (provision) for income taxes 176 (2) (13) 28
Net foreign currency translation (97) 246 (1,359) 1
Comprehensive (loss) income $ (5,953) $ 12,096 $ (21,579) $ 39,888