LONG TERM DEBT AND CAPITAL LEASES (Tables)

12 Months Ended

Dec. 31, 2017

Debt Disclosure [Abstract]

Components of Long-Term Debt and Capital Leases

A summary of long-term debt and capital leases is as follows:

	December 31,
	2017		2016
Senior Secured Credit Facility:
Revolving Credit Facility due October 2021; bearing interest at LIBOR plus 2.75%	$	36,000	$	62,600
Term Loan B Facility due October 2023; bearing interest at LIBOR plus 2.50%	346,500		350,000
Tax-Exempt Bonds:
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%	25,000		25,000
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%	15,000		15,000
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%	25,000		—
Finance Authority of Maine Solid Waste Disposal Revenue Bonds Series 2015 due August 2035 - fixed rate interest period through 2025; bearing interest at 5.125%	15,000		15,000
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%	16,000		16,000
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%	11,000		11,000
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%	—		21,400
Finance Authority of Maine Solid Waste Disposal Revenue Bonds Series 2005R-1; letter of credit backed due January 2025 - bore interest at SIFMA Index	—		3,600
Other:
Capital leases maturing through September 2023; bearing interest at up to 7.70%	5,595		5,534
Notes payable maturing through June 2027; bearing interest at up to 7.00%	2,585		449
Principal amount of long-term debt and capital leases	497,680		525,583
Less—unamortized discount and debt issuance costs (1)	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
	$	477,576	$	503,961

(1) A summary of unamortized discount and debt issuance costs by debt instrument follows:

	December 31,
	2017		2016
Revolving Credit Facility	$	3,938	$	4,965
Term Loan B Facility (including unamortized discount of $1,482 and $1,712)	7,392		7,718
New York State Environmental Facilities Corporation Solid Waste Disposal Revenue Bonds Series 2014	1,034		1,221
New York State Environmental Facilities Corporation Solid Waste Disposal Revenue Bonds Series 2014R-2	511		571
Finance Authority of Maine Solid Waste Disposal Revenue Bonds Series 2005R-3	603		—
Finance Authority of Maine Solid Waste Disposal Revenue Bonds Series 2015	691		760
Vermont Economic Development Authority Solid Waste Disposal Long-Term Revenue Bonds Series 2013	573		605
Business Finance Authority of the State of NH Solid Waste Disposal Revenue Bonds Series 2013	436		563
Finance Authority of Maine Solid Waste Disposal Revenue Bonds Series 2005R-2	—		502
Finance Authority of Maine Solid Waste Disposal Revenue Bonds Series 2005R-1	—		31
	$	15,178	$	16,936

Components of Interest Expense

The components of interest expense are as follows:

	Fiscal Year Ended December 31,
	2017			2016			2015
Interest expense on long-term debt and capital leases	$	22,060		$	34,741		$	35,868
Amortization of debt issuance costs and discount on long-term debt	2,692			3,881			3,977
Letter of credit fees	703			593			637
Less: capitalized interest	(295		)	(273		)	(62		)
Total interest expense	$	25,160		$	38,942		$	40,420

Schedule of Future Maturities of Debt

Aggregate principal maturities of long-term debt and capital leases are as follows:

Estimated Future Payments as of December 31, 2017
2018	$	4,926
2019	5,002
2020	5,269
2021	40,773
2022	4,279
Thereafter	437,431
	$	497,680