Leases - Undiscounted Cash Flows for the Finance and Operating Leases (Detail) - USD ($) $ in Thousands	Jun. 27, 2020	Dec. 28, 2019
Operating Leased Assets [Line Items]
2020 Remainder	$ 22,849
2021	32,858
2022	23,709
2023	16,686
2024	6,742
Thereafter	793
Total future minimum lease payments	103,637
Less amount representing interest (2.1% to 4.4%)	5,266
Present value of minimum lease payments	98,371
Current maturities of long-term debt	38,219	$ 42,632
Long-term debt, excluding current maturities	60,152	$ 70,212
2020	340
2021	643
2022	645
2023	515
2024	448
Thereafter	92
Total future minimum lease payments	2,683
Less amount representing interest (2.1% to 4.4%)	221
Present value of minimum lease payments	2,462
Other current liabilities [Member]
Operating Leased Assets [Line Items]
Operating lease, liability, current	648
Deferred income taxes and other noncurrent liabilities [Member]
Operating Leased Assets [Line Items]
Operating lease, liability, non-current	$ 1,814