LONG TERM DEBT AND CAPITAL LEASES (Tables)

12 Months Ended

Dec. 31, 2016

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,
	2016		2015
Senior Secured Credit Facility:
Revolving Credit Facility due October 2021; bearing interest at LIBOR plus 3.00%	$	62,600	$	—
Term Loan B Facility due October 2023; bearing interest at LIBOR plus 3.00%	350,000		—
Senior Secured Asset-Based Revolving Credit Facility:
Due February 2020; bore interest at LIBOR plus 2.25%	—		57,422
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		—
Finance Authority of Maine Solid Waste Disposal Revenue Bonds Series 2005R-2 due January 2025 - fixed rate interest period through 2017; bearing interest at 6.25%	21,400		21,400
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-1; letter of credit backed due January 2025 - bearing interest at SIFMA Index	3,600		3,600
Other:
Capital leases maturing through April 2023; bearing interest at up to 7.70%	5,534		4,130
Notes payable maturing through January 2021; bearing interest at up to 7.00%	449		1,167
Senior Subordinated Notes:
Due February 2019; bore interest at 7.75%	—		370,300
Principal amount of long-term debt and capital leases	525,583		525,019
Less—unamortized discount and debt issuance costs (1)	16,936		17,586
Long-term debt and capital leases less unamortized discount and debt issuance costs	508,647		507,433
Less—current maturities of long-term debt	4,686		1,448
	$	503,961	$	505,985

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

	December 31,
	2016		2015
Revolving Credit Facility	$	4,965	$	—
Term Loan B Facility (including unamortized discount of $1,712 and $0)	7,718		—
Senior Secured Asset-Based Revolving Credit Facility	—		5,593
New York State Environmental Facilities Corporation Solid Waste Disposal Revenue Bonds Series 2014	1,221		1,407
New York State Environmental Facilities Corporation Solid Waste Disposal Revenue Bonds Series 2014R-2	571		—
Finance Authority of Maine Solid Waste Disposal Revenue Bonds Series 2005R-2	502		566
Finance Authority of Maine Solid Waste Disposal Revenue Bonds Series 2015	760		830
Vermont Economic Development Authority Solid Waste Disposal Long-Term Revenue Bonds Series 2013	605		636
Business Finance Authority of the State of NH Solid Waste Disposal Revenue Bonds Series 2013	563		690
Finance Authority of Maine Solid Waste Disposal Revenue Bonds Series 2005R-1	31		35
Senior Subordinated Notes (including unamortized discount of $0 and $1,372)	—		7,829
	$	16,936	$	17,586

Components of Interest Expense

The components of interest expense are as follows:

	Fiscal Year Ended December 31,						Eight Months Ended December 31, 2014			Fiscal Year Ended April 30, 2014
	2016			2015
Interest expense on long-term debt and capital leases	$	34,741		$	35,868		$	23,065		$	34,216
Amortization of debt issuance costs and discounts on long-term debt	3,881			3,977			2,193			3,000
Letter of credit fees	593			637			714			1,215
Less: capitalized interest	(273		)	(62		)	(333		)	(256		)
Total interest expense	$	38,942		$	40,420		$	25,639		$	38,175

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, 2016
2017	$	4,686
2018	4,486
2019	4,554
2020	4,873
2021	66,991
Thereafter	439,993
	$	525,583