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COMMITMENTS AND CONTINGENCIES - Schedule of Environmental Liability (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Accrual for Environmental Loss Contingencies [Roll Forward]
Ending balance	$ 5,887
North Country Environmental Services Landfill
Accrual for Environmental Loss Contingencies [Roll Forward]
Beginning balance	0
Accretion expense	0
Obligations incurred	924
Ending balance	924	$ 0
Southbridge Landfill
Accrual for Environmental Loss Contingencies [Roll Forward]
Beginning balance	4,261	4,596
Accretion expense	109	118
Obligations incurred	0	28
Revisions in estimates	0	(188)
Obligations settled	(281)	(293)
Ending balance	4,089	4,261
Potsdam Environmental Remediation Liability
Accrual for Environmental Loss Contingencies [Roll Forward]
Beginning balance	939	1,151
Obligations settled	(65)	(212)
Ending balance	$ 874	$ 939

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Total costs accrued as of the balance sheet date for environmental loss contingencies.

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Amount of expense for newly incurred environmental loss contingencies. Includes, but is not limited to, remediation expense and interest accretion.

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Amount of expense (reversal of expense) which increases (decreases) the accrual for environmental loss contingencies from revisions in estimates to existing obligations. Excludes changes related to business acquisitions, divestitures, or currency movement.

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Amount of cash outflow to settle environmental loss contingencies.

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