Property, Plant and Equipment, Net - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 11.8	$ 9.9	$ 9.3
Capitalized software development costs	7.9	1.7
Spare Parts [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 2.4	$ 2.5