Segment and Geographic Location Information - Components of Segment Revenues and Adjusted EBITDA (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Segment Revenues	$ 155,325	$ 131,428
Segment Adjusted EBITDA	16,922	16,603
Operating Segments
Segment Reporting Information [Line Items]
Segment Revenues	155,325	131,428
Segment Adjusted EBITDA	27,795	25,931
Assessment, Permitting and Response | Operating Segments
Segment Reporting Information [Line Items]
Segment Revenues	58,580	52,214
Segment Adjusted EBITDA	16,280	14,266
Measurement and Analysis | Operating Segments
Segment Reporting Information [Line Items]
Segment Revenues	45,494	42,527
Segment Adjusted EBITDA	6,504	6,387
Remediation and Reuse | Operating Segments
Segment Reporting Information [Line Items]
Segment Revenues	51,251	36,687
Segment Adjusted EBITDA	5,012	5,278
Corporate and Other
Segment Reporting Information [Line Items]
Segment Adjusted EBITDA	$ (10,873)	$ (9,328)