Lease Commitments - Balance Sheet, Operating Lease Term and Discount Rate (Details) - USD ($) $ in Thousands	Jan. 01, 2022	Dec. 26, 2020
Assets
Operating ROU assets	$ 29,616	$ 17,615
Liabilities
Current operating lease liabilities	$ 9,018	$ 6,811
Operating Lease, Liability, Current, Statement of Financial Position	Accrued liabilities	Accrued liabilities
Non-current operating lease liabilities	$ 22,305	$ 12,950
Total lease liabilities	$ 31,323	$ 19,761
Weighted-average remaining lease term (years)	4 years 9 months 14 days	3 years 4 months 28 days
Weighted-average discount rate	4.27%	5.06%