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LONG-TERM DEBT - Summary of Components of Long-Term Debt and Capital Leases by Debt Instrument (Detail) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Dec. 31, 2017
Debt Instrument [Line Items] |  |
Long-term debt and capital lease | $ 514,460 | $ 497,680
Less—unamortized discount and debt issuance costs | 14,489 | 15,178
Long-term debt and capital leases less unamortized discount and debt issuance costs | 499,971 | 482,502
Less—current maturities of long-term debt | 5,037 | 4,926
Non current portion of long term debt and capital lease obligation | 494,934 | 477,576
Revolving Credit Facility |  |
Debt Instrument [Line Items] |  |
Long-term debt and capital lease | 52,600 | 36,000
Less—unamortized discount and debt issuance costs | $ 3,682 | 3,938
Basis spread on variable rate | 2.75% |
Secured Debt | Term Loan B Facility due October 2023; bearing interest at LIBOR plus 2.50% |  |
Debt Instrument [Line Items] |  |
Long-term debt and capital lease | $ 345,625 | 346,500
Less—unamortized discount and debt issuance costs | $ 7,101 | 7,392
Basis spread on variable rate | 2.50% |
Unamortized discount | $ 1,424 | 1,482
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 | $ 987 | 1,034
Debt instrument interest rate percentage | 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 | $ 496 | 511
Debt instrument interest rate percentage | 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 | 25,000
Less—unamortized discount and debt issuance costs | $ 581 | 603
Debt instrument interest rate percentage | 5.25% |
Finance Authority of Maine Solid Waste Disposal Revenue Bonds Series 2015R-1 due August 2035 - fixed rate interest period through 2025; bearing interest at 5.125% |  |
Debt Instrument [Line Items] |  |
Long-term debt and capital lease | $ 15,000 | 15,000
Less—unamortized discount and debt issuance costs | $ 673 | 691
Debt instrument interest rate percentage | 5.125% |
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 | $ 16,000 | 16,000
Less—unamortized discount and debt issuance costs | $ 565 | 573
Debt instrument interest rate percentage | 4.75% |
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 | $ 11,000 | 11,000
Less—unamortized discount and debt issuance costs | $ 404 | 436
Debt instrument interest rate percentage | 4.00% |
Capital leases maturing through December 2107; bearing interest at up to 7.70% |  |
Debt Instrument [Line Items] |  |
Long-term debt and capital lease | $ 6,713 | 5,595
Debt instrument interest rate percentage | 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 | $ 2,522 | $ 2,585
Debt instrument interest rate percentage | 7.00% |

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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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