GOODWILL AND INTANGIBLE ASSETS (Tables)

3 Months Ended

Mar. 31, 2020

GOODWILL AND INTANGIBLE ASSETS

Schedule of changes in goodwill

					Field &
	Environmental				Industrial
	Services				Services
			Accumulated				Accumulated
$s in thousands	Gross		Impairment		Gross		Impairment		Total
Balance at December 31, 2019	$	475,271	$	(6,870)	$	298,579	$	—	$	766,980
Impairment charges		—		(283,600)		—		(16,700)		(300,300)
NRC Merger purchase price allocation adjustment		575		—		446		—		1,021
Impact Environmental acquisition		—		—		300		—		300
Foreign currency translation		(1,368)		—		(602)		—		(1,970)
Balance at March 31, 2020	$	474,478	$	(290,470)	$	298,723	$	(16,700)	$	466,031

Schedule of intangible assets, net

	March 31, 2020						December 31, 2019
			Accumulated						Accumulated
$s in thousands	Cost		Amortization		Net		Cost		Amortization		Net
Amortizing intangible assets:
Permits, licenses and lease	$	172,668	$	(19,239)	$	153,429	$	174,339	$	(18,707)	$	155,632
Customer relationships		333,152		(41,781)		291,371		333,090		(35,254)		297,836
Technology - formulae and processes		6,421		(1,907)		4,514		6,964		(2,013)		4,951
Customer backlog		3,652		(2,113)		1,539		3,652		(2,022)		1,630
Tradename		10,390		(5,644)		4,746		10,390		(4,832)		5,558
Developed software		2,874		(1,936)		938		2,895		(1,884)		1,011
Non-compete agreements		5,506		(2,372)		3,134		5,455		(1,694)		3,761
Internet domain and website		536		(163)		373		536		(156)		380
Database		382		(191)		191		388		(191)		197
Total amortizing intangible assets		535,581		(75,346)		460,235		537,709		(66,753)		470,956
Non-amortizing intangible assets:
Permits and licenses		103,769		—		103,769		103,816		—		103,816
Tradename		120		—		120		130		—		130
Total intangible assets	$	639,470	$	(75,346)	$	564,124	$	641,655	$	(66,753)	$	574,902