Business Acquisitions - Summary of the Fair Values of Assets Acquired and Liabilities Assumed (Details) - Series of Individually Immaterial Business Acquisitions $ in Thousands	12 Months Ended
	Jan. 01, 2022 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Cash	$ 1,480
Billed and unbilled receivables, net	17,733
Right-of-use assets	2,932
Property and equipment	3,741
Prepaid expenses	587
Other assets	13
Total Assets	73,307
Liabilities	(13,984)
Deferred tax liabilities	(4,521)
Net assets acquired	54,802
Consideration paid (Cash, Notes and/or stock)	95,560
Contingent earn-out liability (Cash and stock)	5,133
Total Consideration	100,693
Excess consideration over the amounts assigned to the net assets acquired (Goodwill)	45,891
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets:	36,407
Trade name
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets:	2,098
Customer backlog
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets:	3,860
Non-compete
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets:	$ 4,456