Property Plant and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property Plant And Equipment [Abstract]
Depreciation expense	$ 73,200	$ 50,100	$ 44,300
Depreciation capitalized into inventory	$ 17,375	$ 14,627	$ 10,952