Leases - Summary of Balances Related to Lease Portfolio within Consolidated Condensed Statement of Cash Flow (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	[1]	Apr. 01, 2018
Leases [Abstract]
Principal payments on capital lease obligations	$ 2,114		$ 2,100
Interest payments on capital lease obligations	$ 702		$ 900

[1] During the first quarter of 2018, the Company had principal payments on capital lease obligations of $2.1 million and interest payments on capital lease obligations of $0.9 million.