Segment Information - Summary of Segment Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Revenue	$ 1,895,209	$ 1,787,645
Cost of revenue, excluding depreciation and amortization	1,299,777	1,234,418
Gross margin	$ 595,432	$ 553,227
Gross margin percentage	31.40%	30.90%
PDS
Segment Reporting Information [Line Items]
Revenue	$ 1,518,811	$ 1,415,105
Cost of revenue, excluding depreciation and amortization	1,095,091	1,022,640
Gross margin	$ 423,720	$ 392,465
Gross margin percentage	27.90%	27.70%
HHH
Segment Reporting Information [Line Items]
Revenue	$ 218,628	$ 232,584
Cost of revenue, excluding depreciation and amortization	113,762	130,721
Gross margin	$ 104,866	$ 101,863
Gross margin percentage	48.00%	43.80%
MS
Segment Reporting Information [Line Items]
Revenue	$ 157,770	$ 139,956
Cost of revenue, excluding depreciation and amortization	90,924	81,057
Gross margin	$ 66,846	$ 58,899
Gross margin percentage	42.40%	42.10%