Leases - Summary of Balances Related to Lease Portfolio within Condensed Consolidated Statement of Cash Flow (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019		Jul. 01, 2018
Cash flows from operating activities impact:
Operating leases	$ 8,515
Interest payments on financing lease obligations	1,417	[1]	$ 1,800
Total cash flows from operating activities impact	9,932
Cash flows from financing activities:
Principal payments on financing lease obligations	4,261	[1]	$ 4,000
Total cash flows from financing activities impact	$ 4,261

[1] During the first half of 2018, the Company had principal payments on capital lease obligations of $4.0 million and interest payments on capital lease obligations of $1.8 million.