Business Acquisitions - Summary of Elements of Purchase Price of Acquisitions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Business Acquisition [Line Items]
Cash	$ 29,744	$ 59,486	$ 175,450
Common Stock		8,320	25,000
Other Purchase Price Components	1,678	11,866	(1,789)
Contingent Consideration	2,666	7,404	45,204
Total Purchase Price	34,088	87,076	243,865
Environmental Standards
Business Acquisition [Line Items]
Cash	14,473
Other Purchase Price Components	544
Contingent Consideration	1,166
Total Purchase Price	16,183
All Other 2022 Acquisitions
Business Acquisition [Line Items]
Cash	15,271
Other Purchase Price Components	1,134
Contingent Consideration	1,500
Total Purchase Price	$ 17,905
MSE Group
Business Acquisition [Line Items]
Cash		9,082
Common Stock		2,271
Other Purchase Price Components		10,701
Contingent Consideration		1,804
Total Purchase Price		23,858
EI
Business Acquisition [Line Items]
Cash		20,721
Common Stock		2,274
Other Purchase Price Components		(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		1,228
Contingent Consideration		5,600
Total Purchase Price		$ 40,286
CTEH
Business Acquisition [Line Items]
Cash			175,000
Common Stock			25,000
Other Purchase Price Components			(1,939)
Contingent Consideration			44,994
Total Purchase Price			243,055
All Other 2020 Acquisitions
Business Acquisition [Line Items]
Cash			450
Other Purchase Price Components			150
Contingent Consideration			210
Total Purchase Price			$ 810