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Accumulated Other Comprehensive Income (Loss) - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Equity [Abstract]        
Currency translation adjustments $ (44,377) $ 37,376 $ (4,356) $ (89,316)