Leases - Undiscounted Cash Flows for the Finance and Operating Leases (Detail) - USD ($) $ in Thousands	Jun. 26, 2021	Dec. 26, 2020
Operating Leased Assets [Line Items]
2021 Remainder	$ 17,399
2022	28,746
2023	21,735
2024	11,827
2025	5,580
Total future minimum lease payments	85,287
Less amount representing interest (1.9% to 4.4%)	3,656
Present value of minimum lease payments	81,631
Current maturities of long-term debt	30,450	$ 35,415
Long-term debt, excluding current maturities	51,181	$ 65,359
2021 Remainder	384
2022	702
2023	615
2024	529
2025	284
Total future minimum lease payments	2,514
Less amount representing interest (2.1% to 4.4%)	182
Present value of minimum lease payments	2,332
Other current liabilities [Member]
Operating Leased Assets [Line Items]
Operating lease, liability, current	724
Deferred income taxes and other noncurrent liabilities [Member]
Operating Leased Assets [Line Items]
Operating lease, liability, non-current	$ 1,608