Business Acquisitions - Summary of Purchase Price Attributable to Acquisitions (Details) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2023		Dec. 31, 2022
Business Acquisition [Line Items]
Cash	[1]	$ 2,453
Accounts receivable and contract assets	[1]	19,195
Other current assets	[1]	2,271
Current assets	[1]	23,919
Property and equipment	[1]	3,936
Operating lease right-of-use-asset	[1]	7,129
Other intangible assets	[1]	444
Goodwill	[1]	32,767
Total assets	[1]	96,936
Current liabilities	[1]	11,577
Operating lease liability - net of current portion	[1]	10,357
Other non-current liabilities	[1]	130
Total liabilities	[1]	22,064
Purchase price	[1]	74,872
Measurement Period Adjustments
Goodwill		(200)
Matrix
Business Acquisition [Line Items]
Cash		1,524	[1]	$ 1,524
Accounts receivable and contract assets		15,754	[1]	15,752
Other current assets		1,832	[1]	2,094
Current assets		19,110	[1]	19,370
Property and equipment		2,231	[1]	2,231
Operating lease right-of-use-asset		7,083	[1]	14,760
Goodwill		21,065	[1]	36,118
Total assets		69,636	[1]	72,479
Current liabilities		10,599	[1]	11,267
Operating lease liability - net of current portion		10,325	[1]	12,500
Other non-current liabilities		130	[1]	130
Total liabilities		21,054	[1]	23,897
Purchase price		48,582	[1]	$ 48,582
Measurement Period Adjustments
Accounts receivable and contract assets		2
Other current assets		(262)
Current assets		(260)
Operating lease right-of-use asset		(7,677)
Goodwill		(15,053)
Goodwill		(15,053)
Total assets		(2,843)
Current liabilities		(668)
Operating lease liability-net of current portion		(2,175)
Total liabilities		(2,843)
All Other 2023 Acquisitions
Business Acquisition [Line Items]
Cash	[1]	929
Accounts receivable and contract assets	[1]	3,441
Other current assets	[1]	439
Current assets	[1]	4,809
Property and equipment	[1]	1,705
Operating lease right-of-use-asset	[1]	46
Other intangible assets	[1]	444
Goodwill	[1]	11,702
Total assets	[1]	27,300
Current liabilities	[1]	978
Operating lease liability - net of current portion	[1]	32
Total liabilities	[1]	1,010
Purchase price	[1]	26,290
Customer Relationships
Business Acquisition [Line Items]
Intangible assets	[1]	23,540
Customer Relationships | Matrix
Business Acquisition [Line Items]
Intangible assets	[1]	15,799
Measurement Period Adjustments
Intangible assets		15,799
Customer Relationships | All Other 2023 Acquisitions
Business Acquisition [Line Items]
Intangible assets	[1]	7,741
Trade Names
Business Acquisition [Line Items]
Intangible assets	[1]	2,372
Trade Names | Matrix
Business Acquisition [Line Items]
Intangible assets	[1]	2,150
Measurement Period Adjustments
Intangible assets		2,150
Trade Names | All Other 2023 Acquisitions
Business Acquisition [Line Items]
Intangible assets	[1]	222
Covenants Not to Compete
Business Acquisition [Line Items]
Intangible assets	[1]	2,829
Covenants Not to Compete | Matrix
Business Acquisition [Line Items]
Intangible assets	[1]	2,198
Measurement Period Adjustments
Intangible assets		2,198
Covenants Not to Compete | All Other 2023 Acquisitions
Business Acquisition [Line Items]
Intangible assets	[1]	$ 631

[1] The Company is continuing to obtain information to complete the valuation of certain of these acquisitions' assets and liabilities.