Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2020

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule of Amounts Related to Goodwill

Amounts related to goodwill as of December 31, are as follows:

	Assessment, Permitting and Response		Measurements and Analysis		Remediation and Reuse		Total
Balance as of December 31, 2019	$	15,173	$	68,628	$	43,257	$	127,058
Goodwill acquired during the year		146,983		426		200		147,609
Balance as of December 31, 2020	$	162,156	$	69,054	$	43,457	$	274,667

Schedule of Amounts Related to Finite-Lived Intangible Assets

Amounts related to finite-lived intangible assets as of December 31, are as follows:

2020	Estimated Useful Life	Gross Balance		Accumulated Amortization		Total Intangible Assets—Net
Finite lived intangible assets
Customer relationships	7–15 years	$	164,782	$	53,446	$	111,336
Covenants not to compete	4–5 years		29,942		21,469		8,473
Trade names	1–5 years		16,938		12,849		4,089
Proprietary software and other software licenses	3-5 years		21,007		6,132		14,875
Patent	16 years		17,479		1,398		16,081
Total other intangible assets—net		$	250,148	$	95,294	$	154,854

2019	Estimated Useful Life	Gross Balance		Accumulated Amortization		Total Intangible Assets—Net
Finite lived intangible assets
Customer relationships	7–15 years	$	108,782	$	36,700	$	72,082
Covenants not to compete	4–5 years		25,832		17,572		8,260
Trade names	1–5 years		12,738		10,230		2,508
Proprietary software	3 years		3,885		1,359		2,526
Patent	16 years		17,479		306		17,173
Total other intangible assets—net		$	168,716	$	66,167	$	102,549

Schedule of Future Amortization Expense

Future amortization expense is estimated to be as follows for each of the five following years and thereafter ending December 31:

2021		28,157
2022		24,071
2023		20,089
2024		16,951
2025 and thereafter		65,586
Total	$	154,854