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DEBT (Tables) | 6 Months Ended
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Jun. 30, 2021
Debt And Derivatives Disclosure [Abstract] |
Summary of Debt | A summary of debt is as follows:
| June 30, 2021 |  | December 31, 2020
Senior Secured Credit Facility: |  |  |
Revolving line of credit facility ("Revolving Credit Facility") due May 2023; bearing interest at LIBOR plus 1.50% | $ | — |  |  | $ | — |
Term loan A facility ("Term Loan Facility") due May 2023; bearing interest at LIBOR plus 1.50% | 348,250 |  |  | 350,000 |
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") due April 2036 - fixed rate interest period through 2028; bearing interest at 4.625% | 16,000 |  |  | 16,000 |
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 4.0% | 34,467 |  |  | 31,486 |
Notes payable maturing through June 2027; bearing interest at a weighted average of 3.4% | 4,454 |  |  | 4,933 |
Principal amount of debt | 549,171 |  |  | 548,419 |
Less—unamortized debt issuance costs (1) | 7,625 |  |  | 8,768 |
Debt less unamortized debt issuance costs | 541,546 |  |  | 539,651 |
Less—current maturities of debt | 14,716 |  |  | 9,240 |
| $ | 526,830 |  |  | $ | 530,411 |
(1)A summary of unamortized debt issuance costs by debt instrument follows:
| June 30, 2021 |  | December 31, 2020
Revolving Credit Facility and Term Loan Facility (collectively, the "Credit Facility") | $ | 3,019 |  |  | $ | 3,839 |
New York Bonds 2014R-1 | 967 |  |  | 1,000 |
New York Bonds 2014R-2 | 298 |  |  | 329 |
New York Bonds 2020 | 1,372 |  |  | 1,461 |
FAME Bonds 2005R-3 | 305 |  |  | 347 |
FAME Bonds 2015R-1 | 452 |  |  | 482 |
FAME Bonds 2015R-2 | 304 |  |  | 343 |
Vermont Bonds | 460 |  |  | 487 |
New Hampshire Bonds | 448 |  |  | 480 |
| $ | 7,625 |  |  | $ | 8,768 |
Summary of Cash Flow Hedges | A summary of the effect of cash flow hedges related to derivative instruments on the consolidated balance sheet follows:
|  |  | Fair Value
| Balance Sheet Location |  | June 30, 2021 |  | December 31, 2020
Interest rate swaps | Other non-current assets |  | $ | 153 |  |  | $ | — |
Interest rate swaps | Other accrued liabilities |  | $ | 4,776 |  |  | $ | 4,774 |
Interest rate swaps | Other long-term liabilities |  | 3,959 |  |  | 8,463 |
|  |  | $ | 8,735 |  |  | $ | 13,237 |
Interest rate swaps | Accumulated other comprehensive loss, net of tax |  | $ | (8,782) |  |  | $ | (13,434) |
Interest rate swaps - tax effect | Accumulated other comprehensive loss, net of tax |  | 860 |  |  | 1,917 |
|  |  | $ | (7,922) |  |  | $ | (11,517) |
A summary of the amount of expense on cash flow hedging relationships related to interest rate swaps reclassified from accumulated other comprehensive loss into earnings follows:
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
Statement of Operations Location |  | 2021 |  | 2020 |  | 2021 |  | 2020
Interest expense |  | $ | 1,202 |  |  | $ | 990 |  |  | $ | 2,347 |  |  | $ | 1,357 |

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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- Definition Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5624163-113959 + Details
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