INCOME TAXES - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets:
Provision for doubtful accounts	$ 11,544	$ 10,188
Closure, post-closure and remedial liabilities	31,837	28,206
Operating lease liabilities	42,255	42,218
Accrued expenses	19,311	20,455
Accrued compensation and benefits	20,171	24,504
Net operating loss carryforwards	41,585	68,381
Tax credit carryforwards	8,903	12,368
Interest rate swap liability	0	5,215
Stock-based compensation	3,988	2,705
Other	7,487	5,635
Total deferred tax assets	187,081	219,875
Deferred tax liabilities:
Property, plant and equipment	(281,131)	(273,883)
Operating lease right-of-use assets	(41,939)	(41,260)
Interest rate swap asset	(17,587)	0
Permits and other intangible assets	(132,681)	(138,241)
Prepaid expenses	(12,088)	(10,212)
Total deferred tax liabilities	(485,426)	(463,596)
Total net deferred tax liability before valuation allowance	(298,345)	(243,721)
Less valuation allowance	(42,509)	(69,806)
Net deferred tax liabilities	(340,854)	$ (313,527)
State net operating loss carryforwards, begin to expire in 2023	231,400
Federal operating loss carryforwards, begin to expire in 2024	34,800
Foreign net operating loss carryforwards, begin to expire in 2023	85,600
Foreign tax credit carryforwards, begin to expire between 2023 and 2024	$ 7,700