SEGMENT REPORTING - Schedule of Revenues Attributable to Services Provided (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Revenue from External Customer [Line Items]
Revenues	$ 457,328	$ 417,101
Solid waste
Revenue from External Customer [Line Items]
Revenues	368,529	334,904
Collection
Revenue from External Customer [Line Items]
Revenues	309,652	276,461
Disposal
Revenue from External Customer [Line Items]
Revenues	49,511	48,485
Transportation
Revenue from External Customer [Line Items]
Revenues	4,647	5,214
Landfill gas-to-energy
Revenue from External Customer [Line Items]
Revenues	2,935	2,765
Processing
Revenue from External Customer [Line Items]
Revenues	1,784	1,979
Resource Solutions
Revenue from External Customer [Line Items]
Revenues	88,799	82,197
Processing
Revenue from External Customer [Line Items]
Revenues	43,315	44,516
National Accounts
Revenue from External Customer [Line Items]
Revenues	$ 45,484	$ 37,681