Summary of Significant Accounting Policies - Revenue by Contract Type (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jul. 01, 2022	Jun. 30, 2023	Jul. 01, 2022
Schedule Of Revenue By Contract Type [Line Items]
Revenue percent	100.00%	100.00%	100.00%	100.00%
Time-and-material [Member]
Schedule Of Revenue By Contract Type [Line Items]
Revenue percent	74.50%	77.70%	76.60%	77.60%
Progress Billing [Member]
Schedule Of Revenue By Contract Type [Line Items]
Revenue percent	18.60%	17.70%	16.90%	18.10%
Percentage-of-completion [Member]
Schedule Of Revenue By Contract Type [Line Items]
Revenue percent	6.90%	4.60%	6.50%	4.30%