4. Long-Term Debt

As of June 30, 2017 and September 30, 2016, the Company’s long-term debt consisted of the following:



(in thousands)	June 30, 2017			September 30, 2016
Term loan principal; principal and interest are due in quarterly installments through January 31, 2021	$	634,115		$	639,030
Original issue discount on term loan, net of accumulated amortization	(970		)	(1,178		)
Deferred financing costs, net of accumulated amortization	(5,567		)	(5,890		)
	627,578			631,962
Less current portion	6,554			6,554
Long-term debt	$	621,024		$	625,408

Senior Secured Credit Facilities

NMHI's senior credit agreement (the “senior credit agreement”), as amended, governs a $655.0 million Tranche B term loan facility (the “term loan facility”), of which $50.0 million was deposited in a cash collateral account in support of the issuance of letters of credit under an institutional letter of credit facility (the “institutional letter of credit facility”), and a $120.0 million senior secured revolving credit facility (the “senior revolver”). The term loan facility has a 7 year maturity and the senior revolver has a 5 year maturity from the effective date, or January 31, 2014. All of the obligations under the senior secured credit facilities are guaranteed by NMHH and the subsidiary guarantors named therein. The senior credit agreement provides that NMHI may make one or more offers to the lenders, and consummate transactions with individual lenders that accept the terms contained in such offers, to extend the maturity date of the lender’s term loans and/or revolving commitments, subject to certain conditions, and any extended term loans or revolving commitments will constitute a separate class of term loans or revolving commitments.

On May 25, 2017, NMHI entered into Amendment No. 5 to its senior credit agreement (the "repricing amendment"). Under the terms of the repricing amendment, the applicable interest margin for the term loan facility under the senior credit agreement decreased by 25 basis points for both alternate base rate ("ABR") borrowings and Eurodollar borrowings, and reduced the Eurodollar floor by 25 basis points. The repricing amendment also reset the period during which a 1.0% prepayment premium may be repriced for a repricing transaction (as defined in the senior credit agreement) until one year after the effective date of the repricing amendment.

The senior revolver includes borrowing capacity available for letters of credit and for borrowings on same-day notice, referred to as the “swingline loans.” Any issuance of letters of credit or borrowing on a swingline loan will reduce the amount available under the senior revolver. As of June 30, 2017, NMHI had no loans under the senior revolver and $47.4 million of letters of credit issued under the institutional letter of credit facility and $2.9 million of letters of credit issued under the senior revolver.

As a result of the repricing amendment, borrowings under the term loan facility bear interest, at our option, at: (i) an alternate base rate ("ABR") equal to the greater of (a) the prime rate of Barclays Bank PLC, (b) the federal funds rate plus 1/2 of 1.0%, and (c) the Eurodollar rate for an interest period of one-month plus 100 basis points (provided that the ABR rate applicable to the term loan facility will not be less than 2.00% per annum), plus 2.00%; or (ii) the Eurodollar rate (provided that the Eurodollar rate applicable to the term loan facility will not be less than 0.75% per annum), plus 3.00%. Borrowings under the revolving and swingline loans bear interest at our option at (i) an alternate base rate ("ABR") equal to the greater of (a) the prime rate of Barclays Bank PLC, (b) the federal funds rate plus 1/2 of 1.0%, and (c) the Eurodollar rate for an interest period of one-month plus 100 basis points (provided that the ABR rate applicable to the term loan facility will not be less than 2.00% per annum), plus 2.25%; or (ii) the Eurodollar rate (provided that the Eurodollar rate applicable to the term loan facility will not be less than 0.75% per annum), plus 3.25%. NMHI is also required to pay a commitment fee to the lenders under the senior revolver at an initial rate of 0.50% of the average daily unutilized commitments thereunder. NMHI must also pay customary letter of credit fees.

The senior credit agreement requires NMHI to make mandatory prepayments, subject to certain exceptions, on a percentage of NMHI's annual Excess Cash Flow, as defined in the senior credit agreement. NMHI determines whether or not a mandatory prepayment is required at the end of each fiscal year. NMHI was not required to make a prepayment for the fiscal year ended September 30, 2016.

Covenants

The senior credit agreement contains negative covenants, including, among other things, limitations on the Company’s ability to incur additional debt, create liens on assets, transfer or sell assets, pay dividends, redeem stock or make other distributions or investments, and engage in certain transactions with affiliates. The senior credit agreement contains a springing financial covenant. If, at the end of any fiscal quarter, the Company’s outstanding borrowings under the senior revolver exceeds 30% of the commitments thereunder, it is required to maintain at the end of each such fiscal quarter a consolidated first lien leverage ratio of not more than 5.50 to 1.00. This consolidated first lien leverage ratio stepped down to 5.00 to 1.00 during the fiscal quarter ending March 31, 2017. The springing financial covenant was not in effect as of June 30, 2017 or September 30, 2016 as NMHI’s outstanding borrowings on the senior revolver did not exceed the threshold.

Derivatives

On January 20, 2015, NMHI entered into two interest rate swap agreements in an aggregate notional amount of $375.0 million in order to reduce the variability of cash flows of our variable rate debt. NMHI entered into these interest rate swaps to hedge the risk of changes in the floating rate of interest on borrowings under the term loan. Under the terms of the swaps, NMHI will receive from the counterparty a quarterly payment based on a rate equal to the greater of 3-month LIBOR or 1.00% per annum, and NMHI will make payments to the counterparty based on a fixed rate of 1.795% per annum, in each case on the notional amount of $375.0 million, settled on a net payment basis. The swap agreements expire on March 31, 2020.

The fair value of the swap agreements, representing the price that would be received to transfer the liability in an orderly transaction between market participants, was $0.9 million and $6.0 million as of June 30, 2017 and September 30, 2016, respectively. The fair value was recorded in Other accrued liabilities and was determined based on pricing models and independent formulas using current assumptions. Hedge ineffectiveness, if any, associated with the swap will be reported by the Company in interest expense. There was no ineffectiveness associated with the swap during the nine months ended June 30, 2017, nor was any amount excluded from ineffectiveness testing for the period.