Goodwill and Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Amounts Related to Goodwill

Amounts related to goodwill are as follows:

	Assessment, Permitting and Response			Measurement and Analysis			Remediation and Reuse			Total
Balance as of December 31, 2022	$	185,116		$	86,205		$	52,547		$	323,868
Goodwill acquired during the period		—			7,183			40,637			47,820
Matrix acquisition measurement period adjustments (Note 7)		—			—			(15,053	)		(15,053	)
Prior year acquisitions measurement period adjustments (Note 7)		(170	)		(6	)		6			(170	)
Foreign currency translation impact		—			—			(66	)		(66	)
Balance as of September 30, 2023	$	184,946		$	93,382		$	78,071		$	356,399

Schedule of Amounts Related to Finite-Lived Intangible Assets

Amounts related to finite-lived intangible assets are as follows:

September 30, 2023	Estimated Useful Life	Gross Balance		Accumulated Amortization		Total Intangible Assets—Net
Finite lived intangible assets
Customer relationships	2-15 years	$	231,564	$	110,743	$	120,821
Covenants not to compete	4-5 years		36,371		30,385		5,986
Trade names	1-5 years		24,434		20,106		4,328
Proprietary software	3-5 years		25,895		18,528		7,367
Patent	16 years		17,479		4,404		13,075
Total other intangible assets    —net		$	335,743	$	184,166	$	151,577

December 31, 2022	Estimated Useful Life	Gross Balance		Accumulated Amortization		Total Intangible Assets—Net
Finite lived intangible assets
Customer relationships	2-15 years	$	208,024	$	95,768	$	112,256
Covenants not to compete	4-5 years		33,542		28,280		5,262
Trade names	1-5 years		22,061		18,256		3,805
Proprietary software	3-5 years		22,698		15,810		6,888
Patent	16 years		17,479		3,583		13,896
Total other intangible assets    —net		$	303,804	$	161,697	$	142,107

Schedule of Future Amortization Expense

Future amortization expense is estimated to be as follows for each of the five following years and thereafter:

December 31,
2023 (remaining)	$	7,769
2024		28,103
2025		21,128
2026		16,446
2027		15,847
Thereafter		62,284
Total	$	151,577