GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

9 Months Ended

Sep. 30, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Changes to Goodwill

The changes in goodwill by segment for the nine months ended September 30, 2022 were as follows (in thousands):

	Environmental Services		Safety-Kleen Sustainability Solutions		Totals
Balance at January 1, 2022	$	1,085,534	$	141,508	$	1,227,042
Increase from current period acquisition	—		34,702		34,702
Measurement period adjustments from prior period acquisition	(6,762)		—		(6,762)
Decrease from disposition of business	(4,412)		—		(4,412)
Foreign currency translation	(3,045)		(1,198)		(4,243)
Balance at September 30, 2022	$	1,071,315	$	175,012	$	1,246,327

Schedule of Finite-Lived Intangible Assets

As of September 30, 2022 and December 31, 2021, the Company's intangible assets consisted of the following (in thousands):

	September 30, 2022						December 31, 2021
	Cost		Accumulated Amortization		Net		Cost		Accumulated Amortization		Net
Permits	$	187,843	$	106,810	$	81,033	$	187,519	$	102,408	$	85,111
Customer and supplier relationships	586,024		235,291		350,733		576,474		214,776		361,698
Other intangible assets	94,592		26,916		67,676		94,271		19,359		74,912
Total amortizable permits and other intangible assets	868,459		369,017		499,442		858,264		336,543		521,721
Trademarks and trade names	122,392		—		122,392		123,191		—		123,191
Total permits and other intangible assets	$	990,851	$	369,017	$	621,834	$	981,455	$	336,543	$	644,912

Summary of Indefinite-Lived Intangible Assets

As of September 30, 2022 and December 31, 2021, the Company's intangible assets consisted of the following (in thousands):

	September 30, 2022						December 31, 2021
	Cost		Accumulated Amortization		Net		Cost		Accumulated Amortization		Net
Permits	$	187,843	$	106,810	$	81,033	$	187,519	$	102,408	$	85,111
Customer and supplier relationships	586,024		235,291		350,733		576,474		214,776		361,698
Other intangible assets	94,592		26,916		67,676		94,271		19,359		74,912
Total amortizable permits and other intangible assets	868,459		369,017		499,442		858,264		336,543		521,721
Trademarks and trade names	122,392		—		122,392		123,191		—		123,191
Total permits and other intangible assets	$	990,851	$	369,017	$	621,834	$	981,455	$	336,543	$	644,912

Schedule of Expected Amortization for the Net Carrying Amount of Finite Lived Intangible Assets

The expected amortization of the net carrying amount of finite-lived intangible assets at September 30, 2022 was as follows (in thousands):

Years Ending December 31,	Expected Amortization
2022 (three months)	$	12,450
2023	45,682
2024	41,536
2025	39,586
2026	37,703
Thereafter	322,485
	$	499,442