INCOME TAXES - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Deferred tax assets:
Provision for doubtful accounts	$ 14,808	$ 10,882
Closure, post-closure and remedial liabilities	32,189	31,944
Operating lease liabilities	60,929	46,784
Accrued expenses	14,749	14,963
Accrued compensation and benefits	16,876	15,058
Net operating loss carryforwards	48,331	39,042
Excess business interest	22,078	0
Tax credit carryforwards	2,619	6,531
Stock-based compensation	4,877	3,516
Other	2,565	4,843
Total deferred tax assets	220,021	173,563
Deferred tax liabilities:
Property, plant and equipment	(311,546)	(284,997)
Operating lease right-of-use assets	(59,999)	(46,584)
Interest rate swap asset	(8,748)	(9,576)
Permits and other intangible assets	(158,905)	(130,391)
Prepaid expenses	(10,881)	(12,372)
Total deferred tax liabilities	(550,079)	(483,920)
Total net deferred tax liability before valuation allowance	(330,058)	(310,357)
Less valuation allowance	(27,232)	(35,272)
Net deferred tax liabilities	(357,290)	$ (345,629)
State net operating loss carryforwards, begin to expire in 2025	290,700
Federal operating loss carryforwards, begin to expire in 2025	79,300
Foreign net operating loss carryforwards, begin to expire in 2025	$ 64,300