Goodwill and Intangible Assets - Schedule of Amounts Related to Goodwill (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2023 USD ($)
Goodwill [Line Items]
Beginning balance	$ 323,868
Goodwill acquired during the period	44,881
Acquisitions measurement period adjustments	(164)
Foreign currency translation impact	(22)
Ending balance	368,563
Assessment, Permitting and Response
Goodwill [Line Items]
Beginning balance	185,116
Acquisitions measurement period adjustments	(170)
Ending balance	184,946
Measurement and Analysis
Goodwill [Line Items]
Beginning balance	86,205
Goodwill acquired during the period	7,146
Acquisitions measurement period adjustments	(6)
Ending balance	93,345
Remediation and Reuse Segment
Goodwill [Line Items]
Beginning balance	52,547
Goodwill acquired during the period	37,735
Acquisitions measurement period adjustments	12
Foreign currency translation impact	(22)
Ending balance	$ 90,272