Property, Plant and Equipment - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property Plant And Equipment Useful Life And Values [Abstract]
Capitalized Computer Software, Net	$ 7.6	$ 9.0
Amortization of computer software	4.4	3.0	$ 2.7
Depreciation expense	$ 19.2	$ 20.6	$ 20.0