Foreign Currency Translation - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Foreign Currency [Abstract]
Foreign currency translation loss (gain)	$ 1,243		$ (7,251)
Foreign currency translation gain (loss)	$ 4,050	$ (26,524)	$ (27,066)	$ (29,144)