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Condensed Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Statement Of Income And Comprehensive Income [Abstract]        
Foreign currency translation gain (loss), deferred income taxes $ 117 $ (1) $ 166 $ (1)