Business Acquisitions - Summary of Elements of Purchase Price of Acquisitions (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Jan. 31, 2021	Dec. 31, 2020
Business Acquisition [Line Items]
Cash		$ 175,450
Common Stock		25,000
Other Purchase Price Components Current		(1,889)
Other Purchase Price Components Long Term		100
Contingent Consideration Current		34,661
Contingent Consideration Long Term		10,543
Total Purchase Price		243,865
MSE Group
Business Acquisition [Line Items]
Cash	$ 9,082
Common Stock	2,271
Other Purchase Price Components Current	10,146
Contingent Consideration Long Term	1,804
Total Purchase Price	$ 23,303
CTEH
Business Acquisition [Line Items]
Cash		175,000
Common Stock		25,000
Other Purchase Price Components Current		(1,939)
Contingent Consideration Current		34,451
Contingent Consideration Long Term		10,543
Total Purchase Price		243,055
Other Acquisition
Business Acquisition [Line Items]
Cash		450
Other Purchase Price Components Current		50
Other Purchase Price Components Long Term		100
Contingent Consideration Current		210
Total Purchase Price		$ 810