Foreign Currency Translation - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Foreign Currency [Abstract]
Foreign currency translation loss (gain)	$ 1,913	$ 221	$ (8,769)	$ 367
Foreign currency translation gain (loss)	$ 7,116	$ (2,045)	$ (30,610)	$ (3,443)