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Revenue Receivables and Contract Assets and Liabilities - Summary of Company's Revenue Disaggregated by Contract Types (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2024	Sep. 29, 2023	Sep. 27, 2024	Sep. 29, 2023
Disaggregation of Revenue [Line Items]
Total revenue	$ 166,035	$ 175,448	$ 376,684	$ 494,744
Fixed-Price [Member]
Disaggregation of Revenue [Line Items]
Total revenue	153,802	153,178	349,182	440,015
Cost Reimbursable [Member]
Disaggregation of Revenue [Line Items]
Total revenue	11,602	19,864	25,983	48,757
Equipment and Labor Revenue [Member]
Disaggregation of Revenue [Line Items]
Total revenue	$ 631	$ 2,406	$ 1,519	$ 5,972

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