Leases - Summary of Balances Related to Lease Portfolio within Consolidated Statement of Cash Flow (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 29, 2019	Dec. 30, 2018
Cash flows from operating activities impact:
Operating leases	$ 24,718	$ 18,138
Interest payments on financing lease obligations	1,728	2,714	$ 3,300
Total cash flows from operating activities impact	26,446	20,852
Cash flows from financing activities impact:
Principal payments on financing lease obligations	5,861	8,656	$ 8,100
Total cash flows from financing activities impact	$ 5,861	$ 8,656