GOODWILL AND INTANGIBLE ASSETS (Tables)

3 Months Ended

Mar. 31, 2022

GOODWILL AND INTANGIBLE ASSETS

Schedule of changes in goodwill

	Waste Solutions				Field Services				Energy Waste
			Accumulated				Accumulated				Accumulated
$s in thousands	Gross		Impairment		Gross		Impairment		Gross		Impairment		Total
Balance at December 31, 2021	$	166,925	$	(6,870)	$	237,368	$	(19,900)	$	399,503	$	(363,900)	$	413,126
Foreign currency translation		278		—		122		—		—		—		400
Balance at March 31, 2022	$	167,203	$	(6,870)	$	237,490	$	(19,900)	$	399,503	$	(363,900)	$	413,526

Schedule of intangible assets, net

	March 31, 2022						December 31, 2021
			Accumulated						Accumulated
$s in thousands	Cost		Amortization		Net		Cost		Amortization		Net
Amortizing intangible assets:
Permits, licenses and lease	$	175,299	$	(28,331)	$	146,968	$	174,959	$	(27,170)	$	147,789
Customer relationships		340,215		(94,542)		245,673		340,065		(87,952)		252,113
Technology - formulae and processes		7,277		(2,628)		4,649		7,166		(2,531)		4,635
Customer backlog		3,652		(2,843)		809		3,652		(2,752)		900
Tradename		10,390		(10,390)		—		10,390		(10,390)		—
Developed software		2,907		(2,552)		355		2,903		(2,475)		428
Non-compete agreements		5,583		(5,256)		327		5,573		(5,211)		362
Internet domain and website		536		(220)		316		536		(213)		323
Database		391		(241)		150		390		(235)		155
Total amortizing intangible assets		546,250		(147,003)		399,247		545,634		(138,929)		406,705
Non-amortizing intangible assets:
Permits and licenses		82,744		—		82,744		82,734		—		82,734
Tradename		136		—		136		134		—		134
Total intangible assets	$	629,130	$	(147,003)	$	482,127	$	628,502	$	(138,929)	$	489,573