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Restructuring Costs - Additional Information (Detail) $ in Millions	3 Months Ended			9 Months Ended	12 Months Ended
	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Dec. 31, 2015 Employee	Dec. 31, 2016	Dec. 31, 2015 USD ($)
Restructuring Cost And Reserve [Line Items]
Workforce reduction, number of individuals \| Employee				160
Workforce reduction, recognized aggregate charge	$ 0.2	$ 0.4	$ 21.1			$ 21.7
Accrued severance costs expected to be paid					2017-03
Cost Of Sales
Restructuring Cost And Reserve [Line Items]
Workforce reduction, recognized aggregate charge						10.8
Selling, General and Administrative Expense
Restructuring Cost And Reserve [Line Items]
Workforce reduction, recognized aggregate charge						$ 10.9