CLOSURE AND POST-CLOSURE LIABILITIES - Changes in Post-Closure Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Changes to post-closure liabilities
Balance at the beginning of the period	$ 118,801	$ 99,103
Liabilities assumed in acquisitions	574	55
Measurement period adjustments from prior period acquisitions	3,015	1,148
New asset retirement obligations	3,092	3,743
Accretion	9,477	8,752
Changes in estimates recorded to consolidated statement of operations	1,200	6,775
Changes in estimates recorded to consolidated balance sheet	(2,106)	4,961
Environmental expenditures	(15,684)	(5,151)
Currency translation and other	231	(585)
Balance at the end of the period	118,600	118,801
Landfill Retirement Liability
Changes to post-closure liabilities
Balance at the beginning of the period	62,251	53,425
Liabilities assumed in acquisitions	0	0
Measurement period adjustments from prior period acquisitions	0	0
New asset retirement obligations	3,092	3,743
Accretion	4,958	4,605
Changes in estimates recorded to consolidated statement of operations	1,147	1,063
Changes in estimates recorded to consolidated balance sheet	(3,706)	3,219
Environmental expenditures	(8,478)	(3,373)
Currency translation and other	179	(431)
Balance at the end of the period	59,443	62,251
Non-Landfill Retirement Liability
Changes to post-closure liabilities
Balance at the beginning of the period	56,550	45,678
Liabilities assumed in acquisitions	574	55
Measurement period adjustments from prior period acquisitions	3,015	1,148
New asset retirement obligations	0	0
Accretion	4,519	4,147
Changes in estimates recorded to consolidated statement of operations	53	5,712
Changes in estimates recorded to consolidated balance sheet	1,600	1,742
Environmental expenditures	(7,206)	(1,778)
Currency translation and other	52	(154)
Balance at the end of the period	$ 59,157	$ 56,550