Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions		12 Months Ended
	Sep. 23, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Total operating lease expense		$ 25.3	$ 26.6	$ 26.7
Loss Contingency, name of plaintiff		Baldwin Hackett & Meeks, Inc.
Loss contingency, damages sought, value	$ 43.8
Loss contingency, damages awarded, value		$ 43.8
Attorney fees and costs		$ 2.7