Business Acquisitions - Summary of the Fair Values of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Jan. 01, 2022	Jan. 02, 2021
Finite-Lived Intangible Assets [Line Items]
Cash		$ 1,480	$ 0
Billed and unbilled receivables, net		17,728	1,439
Right-of-use assets		2,932	0
Property and equipment		3,741	28
Prepaid expenses		519	33
Other assets		13	28
Total Assets		73,152	1,856
Liabilities		(13,984)	(345)
Deferred tax liabilities		(4,521)	(86)
Net assets acquired		54,647	1,425
Consideration paid (Cash, notes and/or stock)		95,316	1,694
Contingent earn-out liability (Cash and stock)		5,133	255
Total Consideration		100,449	1,949
Excess consideration over the amounts assigned to the net assets acquired (Goodwill)		45,802	524
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Intangible assets		36,338	237
Trade name
Finite-Lived Intangible Assets [Line Items]
Intangible assets		2,098	30
Customer backlog
Finite-Lived Intangible Assets [Line Items]
Intangible assets		3,847	56
Other
Finite-Lived Intangible Assets [Line Items]
Intangible assets		$ 4,456	5
Series of Individually Immaterial Business Acquisitions
Finite-Lived Intangible Assets [Line Items]
Cash	$ 0
Billed and unbilled receivables, net	1,807
Right-of-use assets	632
Property and equipment	1,510
Prepaid expenses	0
Other assets	0
Total Assets	8,570
Liabilities	(5,623)
Deferred tax liabilities	0
Net assets acquired	2,947
Consideration paid (Cash, notes and/or stock)	7,921
Contingent earn-out liability (Cash and stock)	6,299
Total Consideration	14,220		$ 1,949
Excess consideration over the amounts assigned to the net assets acquired (Goodwill)	11,273
Series of Individually Immaterial Business Acquisitions | Customer relationships
Finite-Lived Intangible Assets [Line Items]
Intangible assets	3,612
Series of Individually Immaterial Business Acquisitions | Trade name
Finite-Lived Intangible Assets [Line Items]
Intangible assets	268
Series of Individually Immaterial Business Acquisitions | Customer backlog
Finite-Lived Intangible Assets [Line Items]
Intangible assets	460
Series of Individually Immaterial Business Acquisitions | Other
Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 281