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DEBT (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2022
Debt Disclosure [Abstract] |
Components of Debt | A summary of debt is as follows:
| December 31,
| 2022 |  | 2021
Senior Secured Credit Facility: |  |  |
Term Loan A Facility ("Term Loan Facility") due December 2026; bore interest at LIBOR plus 1.125% | $ | 350,000 |  |  | $ | 350,000 |
Revolving Credit Facility ("Revolving Credit Facility") due December 2026; bore interest at LIBOR plus 1.125% | 6,000 |  |  | — |
Tax-Exempt Bonds: |  |  |
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 through 2029; bearing interest at 2.875% | 25,000 |  |  | 25,000 |
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 through 2026; bearing interest at 3.125% | 15,000 |  |  | 15,000 |
New York State Environmental Facilities Corporation Solid Waste Disposal Revenue Bonds Series 2020 ("New York Bonds 2020") due September 2050 - fixed rate interest period through 2025; bearing interest at 2.750% | 40,000 |  |  | 40,000 |
Finance Authority of Maine Solid Waste Disposal Revenue Bonds Series 2005R-3 ("FAME Bonds 2005R-3") due January 2025 - fixed rate interest period through 2025; bearing interest at 5.25% | 25,000 |  |  | 25,000 |
Finance Authority of Maine Solid Waste Disposal Revenue Bonds Series 2015R-1 ("FAME Bonds 2015R-1") due August 2035 - fixed rate interest period through 2025; bearing interest at 5.125% | 15,000 |  |  | 15,000 |
Finance Authority of Maine Solid Waste Disposal Revenue Bonds Series 2015R-2 ("FAME Bonds 2015R-2") due August 2035 - fixed rate interest period through 2025; bearing interest at 4.375% | 15,000 |  |  | 15,000 |
Vermont Economic Development Authority Solid Waste Disposal Long-Term Revenue Bonds Series 2013 ("Vermont Bonds 2013") due April 2036 - fixed rate interest period through 2028; bearing interest at 4.625% | 16,000 |  |  | 16,000 |
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 through 2027; bearing interest at 5.00% | 35,000 |  |  | — |
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 through 2029; bearing interest at 2.95% | 11,000 |  |  | 11,000 |
Other: |  |  |
Finance leases maturing through December 2107; bearing interest at a weighted average of 3.6% | 49,813 |  |  | 45,724 |
Notes payable maturing through August 2024; bearing interest at a weighted average of 1.7% | 664 |  |  | 4,846 |
Principal amount of debt | 603,477 |  |  | 562,570 |
Less—unamortized debt issuance costs (1) | 9,494 |  |  | 10,166 |
Debt less unamortized debt issuance costs | 593,983 |  |  | 552,404 |
Less—current maturities of debt | 8,968 |  |  | 9,901 |
| $ | 585,015 |  |  | $ | 542,503 |
(1)A summary of unamortized debt issuance costs by debt instrument follows:
| December 31,
| 2022 |  | 2021
Revolving Credit Facility and Term Loan Facility (collectively, the "Credit Facility") | $ | 4,716 |  |  | $ | 5,884 |
New York Bonds 2014R-1 | 866 |  |  | 933 |
New York Bonds 2014R-2 | 207 |  |  | 268 |
New York Bonds 2020 | 1,106 |  |  | 1,283 |
FAME Bonds 2005R-3 | 176 |  |  | 262 |
FAME Bonds 2015R-1 | 344 |  |  | 413 |
FAME Bonds 2015R-2 | 193 |  |  | 268 |
Vermont Bonds 2013 | 378 |  |  | 433 |
Vermont Bonds 2022A-1 | 1,144 |  |  | — |
New Hampshire Bonds | 364 |  |  | 422 |
| $ | 9,494 |  |  | $ | 10,166 |
Components of Interest Expense | The components of interest expense are as follows:
| Fiscal Year Ended December 31,
| 2022 |  | 2021 |  | 2020
Interest expense on long-term debt and finance leases | $ | 21,691 |  |  | $ | 19,201 |  |  | $ | 20,084 |
Amortization of debt issuance costs | 1,903 |  |  | 2,288 |  |  | 2,169 |
Letter of credit fees | 458 |  |  | 458 |  |  | 531 |
Less: capitalized interest | (330) |  |  | (718) |  |  | (413) |
Total interest expense | $ | 23,722 |  |  | $ | 21,229 |  |  | $ | 22,371 |
Schedule of Cash Flow Hedges Related to Derivative Instruments | A summary of the effect of cash flow hedges related to derivative instruments on the consolidated balance sheets follows:
|  |  | Fair Value
| Balance Sheet Location |  | December 31, 2022 |  | December 31, 2021
Interest rate swaps | Other current assets |  | $ | 4,345 |  |  | $ | — |
Interest rate swaps | Other non-current assets |  | 7,461 |  |  | 424 |
Total |  |  | $ | 11,806 |  |  | $ | 424 |
Interest rate swaps | Other accrued liabilities |  | $ | — |  |  | $ | 3,796 |
Interest rate swaps | Other long-term liabilities |  | — |  |  | 1,380 |
Total |  |  | $ | — |  |  | $ | 5,176 |
Interest rate swaps | Accumulated other comprehensive income (loss), net |  | $ | 11,806 |  |  | $ | (4,935) |
Interest rate swaps - tax benefit | Accumulated other comprehensive income (loss), net |  | (4,264) |  |  | (168) |
|  |  | $ | 7,542 |  |  | $ | (5,103) |
Schedule of Future Maturities of Debt | Aggregate principal maturities of debt as of December 31, 2022 for each of the next five fiscal years and thereafter are as follows:
Fiscal year ending December 31, 2023 | $ | 8,968 |
Fiscal year ending December 31, 2024 | 12,691 |
Fiscal year ending December 31, 2025 | 43,324 |
Fiscal year ending December 31, 2026 | 352,410 |
Fiscal year ending December 31, 2027 | 5,249 |
Thereafter | 180,835 |
| $ | 603,477 |

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