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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE 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
Statement of Comprehensive Income [Abstract]        
Net profit (loss) $ 34,537 $ (344) $ 21,874 $ 49,132
Foreign currency translation adjustments 171 248 109 (108)
Change in unrealized gains (losses) on available-for-sale securities, net of tax 203 73 20 43
Net change in accumulated other comprehensive income (losses) 374 321 129 (65)
Other comprehensive income (loss) $ 34,911 $ (23) $ 22,003 $ 49,067