Property Plant and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property Plant And Equipment [Abstract]
Depreciation expense	$ 50,100	$ 44,300	$ 36,500
Depreciation capitalized into inventory	$ 14,627	$ 10,952	$ 11,016