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LONG TERM DEBT AND CAPITAL LEASES - Components of Long-Term Debt and Capital Leases (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016
Debt Instrument [Line Items] |  |
Long-term debt and capital lease | $ 497,680 | $ 525,583
Less—unamortized discount and debt issuance costs | 15,178 | 16,936
Long-term debt and capital leases less unamortized discount and debt issuance costs | 482,502 | 508,647
Less—current maturities of long-term debt | 4,926 | 4,686
Long-term debt and capital leases, less current maturities | $ 477,576 | 503,961
Revolving Credit Facility |  |
Debt Instrument [Line Items] |  |
Interest rate | 2.75% |
Long-term debt and capital lease | $ 36,000 | 62,600
Less—unamortized discount and debt issuance costs | 3,938 | 4,965
New York State Environmental Facilities Corporation Solid Waste Disposal Revenue Bonds Series 2014 due December 2044 - fixed rate interest period through 2019; bearing interest at 3.75% |  |
Debt Instrument [Line Items] |  |
Long-term debt and capital lease | 25,000 | 25,000
Less—unamortized discount and debt issuance costs | $ 1,034 | 1,221
Debt instrument interest rate | 3.75% |
New York State Environmental Facilities Corporation Solid Waste Disposal Revenue Bonds Series 2014R-2 due December 2044 - fixed rate interest period through 2026; bearing interest at 3.125% |  |
Debt Instrument [Line Items] |  |
Long-term debt and capital lease | $ 15,000 | 15,000
Less—unamortized discount and debt issuance costs | $ 511 | 571
Debt instrument interest rate | 3.125% |
Finance Authority of Maine Solid Waste Disposal Revenue Bonds Series 2005R-3 due January 2025 - fixed rate interest period through 2025; bearing interest at 5.25% |  |
Debt Instrument [Line Items] |  |
Long-term debt and capital lease | $ 25,000 | 0
Less—unamortized discount and debt issuance costs | $ 603 | 0
Debt instrument interest rate | 5.25% |
Vermont Economic Development Authority Solid Waste Disposal Long-Term Revenue Bonds Series 2013 due April 2036 - fixed rate interest period through 2018; bearing interest at 4.75% |  |
Debt Instrument [Line Items] |  |
Long-term debt and capital lease | $ 15,000 | 15,000
Less—unamortized discount and debt issuance costs | $ 691 | 760
Debt instrument interest rate | 5.125% |
Business Finance Authority of the State of New Hampshire Solid Waste Disposal Revenue Bonds Series 2013 due April 2029 - fixed rate interest period through 2019; bearing interest at 4.00% |  |
Debt Instrument [Line Items] |  |
Long-term debt and capital lease | $ 16,000 | 16,000
Less—unamortized discount and debt issuance costs | $ 573 | 605
Debt instrument interest rate | 4.75% |
Finance Authority of Maine Solid Waste Disposal Revenue Bonds Series 2005R-2 due January 2025 - fixed rate interest period through 2017; bore interest at 6.25% |  |
Debt Instrument [Line Items] |  |
Long-term debt and capital lease | $ 11,000 | 11,000
Less—unamortized discount and debt issuance costs | $ 436 | 563
Debt instrument interest rate | 4.00% |
Finance Authority of Maine Solid Waste Disposal Revenue Bonds Series 2005R-2 due January 2025 - fixed rate interest period through 2017; bore interest at 6.25% |  |
Debt Instrument [Line Items] |  |
Long-term debt and capital lease | $ 0 | 21,400
Less—unamortized discount and debt issuance costs | 0 | $ 502
Debt instrument interest rate |  | 6.25%
Finance Authority of Maine Solid Waste Disposal Revenue Bonds Series 2005R-1; letter of credit backed due January 2025 - bore interest at SIFMA Index |  |
Debt Instrument [Line Items] |  |
Long-term debt and capital lease | 0 | $ 3,600
Less—unamortized discount and debt issuance costs | 0 | 31
Capital leases maturing through September 2023; bearing interest at up to 7.70% |  |
Debt Instrument [Line Items] |  |
Long-term debt and capital lease | $ 5,595 | 5,534
Debt instrument interest rate | 7.70% |
Notes payable maturing through June 2027; bearing interest at up to 7.00% |  |
Debt Instrument [Line Items] |  |
Long-term debt and capital lease | $ 2,585 | 449
Debt instrument interest rate | 7.00% |
Term Loan B Facility due October 2023; bearing interest at LIBOR plus 2.50% | Secured Debt |  |
Debt Instrument [Line Items] |  |
Interest rate | 2.50% |
Long-term debt and capital lease | $ 346,500 | 350,000
Less—unamortized discount and debt issuance costs | 7,392 | 7,718
Unamortized discount | $ 1,482 | $ 1,712

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- Definition Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13,16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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=6879938&loc=d3e572229-122910 + Details
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