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 Useful Life and Values [Abstract]
Depreciation	$ 36,456	$ 30,462	$ 21,097
Capitalized computer software amortization expense	17,700	11,600	$ 9,200
Unamortized computer software costs	$ 60,200	$ 44,900