Business Acquisitions - Summary of Elements of Purchase Price of Acquisitions (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Business Acquisition [Line Items]
Cash	$ 14,623	$ 59,486
Common Stock		8,320
Other Purchase Price Components Current	38	12,256
Contingent Consideration Current		2,801
Contingent Consideration Long Term	1,216	4,603
Total Purchase Price	15,877	87,466
EnvStd
Business Acquisition [Line Items]
Cash	14,473
Other Purchase Price Components Current	38
Contingent Consideration Long Term	1,166
Total Purchase Price	15,677
IAG
Business Acquisition [Line Items]
Cash	150
Contingent Consideration Long Term	50
Total Purchase Price	$ 200
MSE Group
Business Acquisition [Line Items]
Cash		9,082
Common Stock		2,271
Other Purchase Price Components Current		10,701
Contingent Consideration Current		1,551
Contingent Consideration Long Term		253
Total Purchase Price		23,858
EI
Business Acquisition [Line Items]
Cash		20,721
Common Stock		2,274
Other Purchase Price Components Current		(63)
Total Purchase Price		22,932
All Other 2021 Acquisitions
Business Acquisition [Line Items]
Cash		29,683
Common Stock		3,775
Other Purchase Price Components Current		1,618
Contingent Consideration Current		1,250
Contingent Consideration Long Term		4,350
Total Purchase Price		$ 40,676