Leases - Undiscounted Cash Flows for the Finance and Operating Leases (Detail) - USD ($) $ in Thousands	Sep. 26, 2020	Dec. 28, 2019
Operating Leased Assets [Line Items]
2020 Remainder	$ 11,269
2021	33,830
2022	24,358
2023	16,681
2024	6,742
Thereafter	793
Total future minimum lease payments	93,673
Less amount representing interest (2.1% to 4.4%)	6,380
Present value of minimum lease payments	87,293
Current maturities of long-term debt	34,723	$ 42,632
Long-term debt, excluding current maturities	52,570	$ 70,212
2020 Remainder	166
2021	651
2022	653
2023	523
2024	454
Thereafter	154
Total future minimum lease payments	2,601
Less amount representing interest (2.1% to 4.4%)	210
Present value of minimum lease payments	2,391
Other current liabilities [Member]
Operating Leased Assets [Line Items]
Operating lease, liability, current	640
Deferred income taxes and other noncurrent liabilities [Member]
Operating Leased Assets [Line Items]
Operating lease, liability, non-current	$ 1,751