Goodwill and Intangible Assets - Schedule of Amounts Related to Goodwill (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($)
Goodwill [Line Items]
Beginning balance	$ 274,667
Goodwill acquired during the year	37,277
Ending balance	311,944
Assessment, Permitting and Response
Goodwill [Line Items]
Beginning balance	162,156
Goodwill acquired during the year	14,385
Ending balance	176,541
Measurement and Analysis
Goodwill [Line Items]
Beginning balance	69,054
Goodwill acquired during the year	14,716
Ending balance	83,770
Remediation and Reuse Segment
Goodwill [Line Items]
Beginning balance	43,457
Goodwill acquired during the year	8,176
Ending balance	$ 51,633