Leases - Summary of Balances Related to Lease Portfolio within Consolidated Condensed Statement of Cash Flow (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019		Apr. 01, 2018
Cash flows from operating activities impact:
Operating leases	$ 4,136
Interest payments on financing lease obligations	702	[1]	$ 900
Total cash flows from operating activities impact	4,838
Cash flows from financing activities:
Principal payments on financing lease obligations	2,114	[1]	$ 2,100
Total cash flows from financing activities impact	$ 2,114

[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.