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DEBT - Components of Long-Term Debt and Capital Leases (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018
Debt Instrument [Line Items] |  |
Finance leases maturing through December 2107; bearing interest at a weighted average of 5.2% | $ 18,364 |
Principal amount of debt | 522,728 | $ 555,249
Less—unamortized discount and debt issuance costs | 9,406 | 10,950
Debt less unamortized discount and debt issuance costs | 513,322 | 544,299
Less—current maturities of debt | 4,301 | 2,298
Debt, less current portion | $ 509,021 | 542,001
Weighted-average discount rate - finance leases | 5.00% |
Revolving Credit Facility due May 2023 ("Revolving Credit Facility"); bearing interest at LIBOR plus 1.75% |  |
Debt Instrument [Line Items] |  |
Principle amount of debt | $ 26,900 |
Principal amount of debt |  | 69,600
New York State Environmental Facilities Corporation Solid Waste Disposal Revenue Bonds Series 2014 ("New York Bonds 2014") due December 2044 - fixed rate interest period through 2029; bearing interest at 2.875% |  |
Debt Instrument [Line Items] |  |
Principle amount of debt | 25,000 |
Principal amount of debt |  | 25,000
Less—unamortized discount and debt issuance costs | $ 1,057 | 847
Stated interest rate | 2.875% |
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% |  |
Debt Instrument [Line Items] |  |
Principle amount of debt | $ 15,000 |
Principal amount of debt |  | 15,000
Less—unamortized discount and debt issuance costs | $ 390 | 450
Stated interest rate | 3.125% |
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% |  |
Debt Instrument [Line Items] |  |
Principle amount of debt | $ 25,000 |
Principal amount of debt |  | 25,000
Less—unamortized discount and debt issuance costs | $ 432 | 517
Stated interest rate | 5.25% |
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% |  |
Debt Instrument [Line Items] |  |
Principle amount of debt | $ 15,000 |
Principal amount of debt |  | 15,000
Less—unamortized discount and debt issuance costs | $ 552 | 622
Stated interest rate | 5.125% |
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% |  |
Debt Instrument [Line Items] |  |
Principle amount of debt | $ 15,000 |
Principal amount of debt |  | 15,000
Less—unamortized discount and debt issuance costs | $ 417 | 493
Stated interest rate | 4.375% |
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% |  |
Debt Instrument [Line Items] |  |
Principle amount of debt | $ 16,000 |
Principal amount of debt |  | 16,000
Less—unamortized discount and debt issuance costs | $ 541 | 595
Stated interest rate | 4.625% |
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% |  |
Debt Instrument [Line Items] |  |
Principle amount of debt | $ 11,000 |
Principal amount of debt |  | 11,000
Less—unamortized discount and debt issuance costs | $ 539 | 308
Stated interest rate | 2.95% |
Finance leases maturing through December 2107; bearing interest at a weighted average of 5.0% |  |
Debt Instrument [Line Items] |  |
Principal amount of debt |  | 11,248
Notes payable maturing through June 2027; bearing interest at a weighted average of 3.5% |  |
Debt Instrument [Line Items] |  |
Principle amount of debt | $ 5,464 |
Principal amount of debt |  | 2,401
Weighted average interest rate | 3.50% |
Credit Facility |  |
Debt Instrument [Line Items] |  |
Less—unamortized discount and debt issuance costs | $ 5,478 | 7,118
Term Loan A Facility due May 2023 (Term Loan Facility"); bearing interest at LIBOR plus 1.75% | Secured Debt |  |
Debt Instrument [Line Items] |  |
Principle amount of debt | $ 350,000 |
Principal amount of debt |  | $ 350,000
LIBOR | Revolving Credit Facility due May 2023 ("Revolving Credit Facility"); bearing interest at LIBOR plus 1.75% |  |
Debt Instrument [Line Items] |  |
Basis spread on variable rate | 1.75% |
LIBOR | Term Loan A Facility due May 2023 (Term Loan Facility"); bearing interest at LIBOR plus 1.75% | Secured Debt |  |
Debt Instrument [Line Items] |  |
Basis spread on variable rate | 1.75% |

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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