Leases - Summary of Supplemental Balance Sheet Information Related to Operating Leases (Detail) - USD ($) $ in Thousands	Dec. 26, 2020	Dec. 28, 2019
Leases [Abstract]
Operating lease right-of-use assets	$ 39,002	$ 32,198
Other accrued liabilities	$ 5,470	$ 5,348
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:OtherAccruedLiabilitiesCurrent	us-gaap:OtherAccruedLiabilitiesCurrent
Long-term operating lease liabilities	$ 37,083	$ 29,730
Total operating lease liabilities	$ 42,553	$ 35,078
Weighted average remaining lease term (years)	8 years 11 months 8 days	10 years 9 months 29 days
Weighted average discount rate	5.55%	6.32%