Summary of Significant Accounting Policies - Accounts Receivable Factoring (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 29, 2023	Sep. 30, 2022	Sep. 29, 2023	Sep. 30, 2022
Accounts Notes And Loans Receivable [Line Items]
Cost of services	$ 51,824,000	$ 56,773,000	$ 163,484,000	$ 188,604,000
Trade Accounts Receivable [Member]
Accounts Notes And Loans Receivable [Line Items]
Cost of services	0		100,000
Trade Accounts Receivable [Member] | Maximum [Member]
Accounts Notes And Loans Receivable [Line Items]
Cost of services		100,000		100,000
Trade Accounts Receivable [Member] | Factoring Agreement [Member]
Accounts Notes And Loans Receivable [Line Items]
Accounts Receivable, Sold	$ 0	$ 7,700,000	$ 12,400,000	$ 12,200,000