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v3.26.1

DEBT - Schedule of Debt (Details) - USD ($) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2026 | Dec. 31, 2025 | Mar. 31, 2025
Debt Instrument [Line Items] |  |  |
Weighted-average discount rate - finance leases | 4.708% |  |
Finance leases maturing through December 2107; bearing interest at a weighted average of 4.708% as of March 31, 2026 | $ 89,969 | $ 94,035 |
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration] | Debt, less current portion | Debt, less current portion |
Principal amount of debt | $ 1,164,566 | $ 1,168,632 |
Less—unamortized debt issuance costs | 13,223 | 13,970 |
Debt less unamortized debt issuance costs | 1,151,343 | 1,154,662 |
Less—current maturities of debt | 24,588 | 25,735 |
Debt, less current portion | $ 1,126,755 | 1,128,927 |
Secured Debt | Term loan A facility (“Term Loan Facility”) payable quarterly beginning in the fiscal year ended December 31, 2027 with balance due September 2029; bearing interest at 5.218% as of March 31, 2026 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 5.218% |  |
Principal amount of debt | $ 800,000 | 800,000 |
Line of Credit | Revolving Credit Facility due September 2029; bearing interest at term secured overnight financing rate (“Term SOFR”) plus 1.550% |  |  |
Debt Instrument [Line Items] |  |  |
Variable rate margin | 1.55% |  |
Principal amount of debt | $ 0 | 0 |
Unsecured Debt |  |  |
Debt Instrument [Line Items] |  |  |
Principal amount of debt | $ 273,500 |  |
Unsecured Debt | New York State Environmental Facilities Corporation Solid Waste Disposal Revenue Bonds Series 2014 (“New York Bonds 2014R-1”) due December 2044 - fixed rate interest period bearing interest at 2.875% through December 2029 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 2.875% |  |
Principal amount of debt | $ 25,000 | 25,000 |
Unsecured Debt | New York State Environmental Facilities Corporation Solid Waste Disposal Revenue Bonds Series 2014R-2 (“New York Bonds 2014R-2”) due December 2044 - fixed rate interest period bearing interest at 3.125% through May 2026 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 3.125% |  |
Principal amount of debt | $ 15,000 | 15,000 |
Unsecured Debt | New York State Environmental Facilities Corporation Solid Waste Disposal Revenue Bonds Series 2020 (“New York Bonds 2020”) due September 2050 - fixed rate interest period bearing interest at 4.250% through September 2030 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 4.25% |  |
Principal amount of debt | $ 37,500 | 37,500 |
Unsecured Debt | New York State Environmental Facilities Corporation Solid Waste Disposal Revenue Bonds Series 2020R-2 (“New York Bonds 2020R-2”) due September 2050 - fixed rate interest period bearing interest at 5.125% through September 2030 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 5.125% |  |
Principal amount of debt | $ 35,000 | 35,000 |
Unsecured Debt | Finance Authority of Maine Solid Waste Disposal Revenue Bonds Series 2015R-3 (“FAME Bonds 2015R-3”) due August 2035 - fixed rate interest period bearing interest at 5.000% through August 2035 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 5.00% |  |
Principal amount of debt | $ 29,000 | 29,000 |
Unsecured Debt | Finance Authority of Maine Solid Waste Disposal Revenue Bonds Series 2024 (“FAME Bonds 2024”) due December 2047 - fixed rate interest period bearing interest at 4.625% through May 2035 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 4.625% |  |
Principal amount of debt | $ 45,000 | 45,000 |
Unsecured Debt | Vermont Economic Development Authority Solid Waste Disposal Long-Term Revenue Bonds Series 2013 (“Vermont Bonds 2013”) due April 2036 - fixed rate interest period bearing interest at 4.625% through April 2028 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 4.625% |  |
Principal amount of debt | $ 16,000 | 16,000 |
Unsecured Debt | Vermont Economic Development Authority Solid Waste Disposal Long-Term Revenue Bonds Series 2022A-1 (“Vermont Bonds 2022A-1”) due June 2052 - fixed rate interest period bearing interest at 5.000% through May 2027 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 5.00% |  |
Principal amount of debt | $ 35,000 | 35,000 |
Unsecured Debt | Vermont Economic Development Authority Solid Waste Disposal Revenue Bonds Series 2022A-2 (“Vermont Bonds 2022A-2”) due June 2052 - fixed rate interest period bearing interest at 4.375% through May 2032 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 4.375% |  | 4.375%
Principal amount of debt | $ 25,000 | 25,000 |
Unsecured Debt | Business Finance Authority of the State of New Hampshire Solid Waste Disposal Revenue Bonds Series 2013 (“New Hampshire Bonds”) due April 2029 - fixed rate interest period bearing interest at 2.950% through April 2029 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate | 2.95% |  |
Principal amount of debt | $ 11,000 | 11,000 |
Notes payable with no stated interest rate maturing through September 2028 |  |  |
Debt Instrument [Line Items] |  |  |
Principal amount of debt | $ 1,097 | $ 1,097 |

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