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Other, Net (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Other Income And Expenses [Abstract]        
Foreign currency transaction losses $ (2,913) $ (1,401) $ (785) $ (2,410)
Realized gain on available-for-sale securities       1,557
Other (239) (29) (721) (46)
Total $ (3,152) $ (1,430) $ (1,506) $ (899)