Revenue Receivables and Contract Assets and Liabilities - Summary of Company's Revenue Disaggregated by Contract Types (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2023	Dec. 30, 2022
Disaggregation of Revenue [Line Items]
Total revenue	$ 632,806	$ 664,158
Fixed-Price [Member]
Disaggregation of Revenue [Line Items]
Total revenue	567,224	601,903
Cost Reimbursable [Member]
Disaggregation of Revenue [Line Items]
Total revenue	57,063	54,835
Equipment and Labor Revenue [Member]
Disaggregation of Revenue [Line Items]
Total revenue	$ 8,519	$ 7,420