Goodwill and Intangible Assets - Schedule of Amounts Related to Goodwill (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($)
Goodwill [Line Items]
Beginning balance	$ 323,868
Goodwill acquired during the period	47,820
Matrix acquisition measurement period adjustments (Note 7)	(200)
Prior year acquisitions measurement period adjustments (Note 7)	(170)
Foreign currency translation impact	(66)
Ending balance	356,399
Assessment, Permitting and Response
Goodwill [Line Items]
Beginning balance	185,116
Prior year acquisitions measurement period adjustments (Note 7)	(170)
Ending balance	184,946
Measurement and Analysis
Goodwill [Line Items]
Beginning balance	86,205
Goodwill acquired during the period	7,183
Prior year acquisitions measurement period adjustments (Note 7)	(6)
Ending balance	93,382
Remediation and Reuse Segment
Goodwill [Line Items]
Beginning balance	52,547
Goodwill acquired during the period	40,637
Prior year acquisitions measurement period adjustments (Note 7)	6
Foreign currency translation impact	(66)
Ending balance	78,071
Matrix
Goodwill [Line Items]
Matrix acquisition measurement period adjustments (Note 7)	(15,053)
Matrix | Remediation and Reuse Segment
Goodwill [Line Items]
Matrix acquisition measurement period adjustments (Note 7)	$ (15,053)