Other Current Liabilities - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Payables And Accruals [Abstract]
Pre-tax restructuring expense	$ 2.8
Cumulative costs incurred to date on restructuring	1.7
Accrued in other current liabilities related to restructuring	1.0	$ 1.5
Reduction in estimated restructuring costs to be incurred	0.2
Additional payments for restructuring	$ 0.2