REMEDIAL LIABILITIES - Estimates (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) facility	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Site Contingency [Line Items]
Accrual for Environmental Loss Contingencies	$ 111,873	$ 114,813	$ 114,173
% of Total	100.00%
Reasonably possible additional liabilities	$ 21,137
Facilities now used in active conduct of the Company's business (44 facilities)
Site Contingency [Line Items]
Accrual for Environmental Loss Contingencies	$ 42,875
% of Total	38.30%
Reasonably possible additional liabilities	$ 8,520
Number of facility by type | facility	44
Inactive facilities not now used in active conduct of the Company's business but most of which were acquired because the assumption of remedial liabilities for such facilities was part of the purchase price for the CSD assets (24 facilities)
Site Contingency [Line Items]
Accrual for Environmental Loss Contingencies	$ 59,801
% of Total	53.50%
Reasonably possible additional liabilities	$ 11,237
Number of facility by type | facility	24
Superfund sites (16 sites)
Site Contingency [Line Items]
Accrual for Environmental Loss Contingencies	$ 9,197
% of Total	8.20%
Reasonably possible additional liabilities	$ 1,380
Number of facility by type | facility	16
Superfund sites (16 sites) | Various
Site Contingency [Line Items]
Accrual for Environmental Loss Contingencies	$ 9,197
% of Total	8.20%
Reasonably possible additional liabilities	$ 1,380
Closed incinerator and landfill | Baton Rouge LA
Site Contingency [Line Items]
Accrual for Environmental Loss Contingencies	$ 25,761
% of Total	23.00%
Reasonably possible additional liabilities	$ 4,306
Closed incinerator | Bridgeport, NJ
Site Contingency [Line Items]
Accrual for Environmental Loss Contingencies	$ 17,792
% of Total	15.90%
Reasonably possible additional liabilities	$ 3,605
Idled incinerator and legal proceedings | Mercier, Quebec
Site Contingency [Line Items]
Accrual for Environmental Loss Contingencies	$ 11,460
% of Total	10.30%
Reasonably possible additional liabilities	$ 1,729
Operating solvent recycling center | Linden, NJ
Site Contingency [Line Items]
Accrual for Environmental Loss Contingencies	$ 6,974
% of Total	6.20%
Reasonably possible additional liabilities	$ 1,460
All other incinerators, landfills, wastewater treatment facilities and service centers (64 facilities)
Site Contingency [Line Items]
Number of facility by type | facility	64
All other incinerators, landfills, wastewater treatment facilities and service centers (64 facilities) | Various
Site Contingency [Line Items]
Accrual for Environmental Loss Contingencies	$ 40,689
% of Total	36.40%
Reasonably possible additional liabilities	$ 8,657