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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME (Unaudited) (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 Partners Capital [Abstract]        
Net (loss) income $ (1,461) $ 3,268 $ 3,790 $ 7,798
Other comprehensive income:        
Foreign currency 1,262 170 629 84
Other comprehensive income 1,262 170 629 84
Comprehensive (loss) income $ (199) $ 3,438 $ 4,419 $ 7,882