Property, Plant and Equipment - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property Plant And Equipment Useful Life And Values [Abstract]
Depreciation expense	$ 19.0	$ 19.2	$ 20.6
Capitalized Computer Software, Net	21.3	7.6
Amortization of computer software	$ 6.4	$ 4.4	$ 3.0