Segment Information - Summary of Segment Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Jan. 01, 2022
Segment Reporting Information [Line Items]
Revenue	$ 1,787,645	$ 1,678,618
Cost of revenue, excluding depreciation and amortization	1,234,418	1,136,214
Gross margin	$ 553,227	$ 542,404
Gross margin percentage	30.90%	32.30%
PDS
Segment Reporting Information [Line Items]
Revenue	$ 1,415,105	$ 1,358,116
Cost of revenue, excluding depreciation and amortization	1,022,640	963,257
Gross margin	$ 392,465	$ 394,859
Gross margin percentage	27.70%	29.10%
HHH
Segment Reporting Information [Line Items]
Revenue	$ 232,584	$ 177,272
Cost of revenue, excluding depreciation and amortization	130,721	93,557
Gross margin	$ 101,863	$ 83,715
Gross margin percentage	43.80%	47.20%
MS
Segment Reporting Information [Line Items]
Revenue	$ 139,956	$ 143,230
Cost of revenue, excluding depreciation and amortization	81,057	79,400
Gross margin	$ 58,899	$ 63,830
Gross margin percentage	42.10%	44.60%