REMEDIAL LIABILITIES - Changes in Remedial Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Changes to remedial liabilities
Balance at the beginning of the period	$ 111,873	$ 114,813
Liabilities assumed in acquisitions		1,216
Accretion	4,191	4,388
Changes in estimates recorded to consolidated statement of operations	1,497	296
Expenditures	(8,795)	(8,904)
Currency translation and other	(906)	64
Liabilities assumed in acquisition of real estate	8,092
Measurement period adjustments from prior period acquisition	338
Balance at the end of the period	116,290	111,873
Remedial Liabilities for Landfill Sites
Changes to remedial liabilities
Balance at the beginning of the period	1,780	1,865
Liabilities assumed in acquisitions		0
Accretion	86	90
Changes in estimates recorded to consolidated statement of operations	8	(126)
Expenditures	(50)	(49)
Currency translation and other	0	0
Liabilities assumed in acquisition of real estate	0
Measurement period adjustments from prior period acquisition	0
Balance at the end of the period	1,824	1,780
Remedial Liabilities for Inactive Sites
Changes to remedial liabilities
Balance at the beginning of the period	59,787	63,060
Liabilities assumed in acquisitions		0
Accretion	2,498	2,614
Changes in estimates recorded to consolidated statement of operations	877	(178)
Expenditures	(3,370)	(4,889)
Currency translation and other	(43)	(820)
Liabilities assumed in acquisition of real estate	0
Measurement period adjustments from prior period acquisition	0
Balance at the end of the period	59,749	59,787
Remedial Liabilities (Including Superfund) for Non-Landfill Operations
Changes to remedial liabilities
Balance at the beginning of the period	50,306	49,888
Liabilities assumed in acquisitions		1,216
Accretion	1,607	1,684
Changes in estimates recorded to consolidated statement of operations	612	600
Expenditures	(5,375)	(3,966)
Currency translation and other	(863)	884
Liabilities assumed in acquisition of real estate	8,092
Measurement period adjustments from prior period acquisition	338
Balance at the end of the period	$ 54,717	$ 50,306