LONG-TERM DEBT

The components of long-term debt as of the dates indicated below were as follows:



	September 30, 2017				December 31, 2016
	Principal		Unamortized Debt Issuance Debt Cost		Principal		Unamortized Debt Issuance Debt Cost
	(Thousands of dollars)
Senior Notes issued March 17, 2014, interest only payable semi-annually at 5.25%, maturing March 15, 2019	$	500,000	$	1,818	$	500,000	$	2,753
Revolving Credit Facility due October 1, 2018 with a group of commercial banks, interest payable at variable rates	100,000		—		134,000		—
Total long-term debt	$	600,000	$	1,818	$	634,000	$	2,753

Our 5.25% Senior Notes (the “2019 Notes”) will mature on March 15, 2019, are unconditionally guaranteed on a senior basis by each of PHI, Inc.’s wholly-owned domestic subsidiaries, and are the general, unsecured obligations of PHI, Inc. and the guarantors. Interest is payable semi-annually on March 15 and September 15 of each year. PHI has the option to redeem some or all of the 2019 Notes at any time on or after March 15, 2016 at specified redemption prices. The indenture governing the 2019 Notes (the “2019 Indenture”) contains, among other things, certain restrictive covenants, including limitations on incurring indebtedness, creating liens, selling assets and entering into certain transactions with affiliates. The covenants also limit PHI’s ability to, among other things, pay cash dividends on common stock, repurchase or redeem common or preferred equity, prepay subordinated debt and make certain investments. Upon the occurrence of a “Change in Control Repurchase Event” (as defined in the 2019 Indenture), PHI will be required, unless it has previously elected to redeem the 2019 Notes as described above, to make an offer to purchase the 2019 Notes for a cash price equal to 101% of their principal amount.

Revolving Credit Facility – We have an amended and restated revolving credit facility (our “credit facility”) that matures on October 1, 2018. Under this facility, we can borrow up to $150.0 million at floating interest rates based on either the London Interbank Offered Rate plus 225 basis points or the prime rate (each as defined in our credit facility), at our option. Our credit facility includes usual and customary covenants and events of default for credit facilities of its type. Our ability to borrow under the credit facility is conditioned upon our continued compliance with such covenants, including, among others, (i) covenants that restrict our ability to engage in certain asset sales, mergers or other fundamental changes, to incur liens or to engage in certain other transactions or activities and (ii) financial covenants that stipulate that PHI will maintain a consolidated working capital ratio of at least 2 to 1, a net funded debt to consolidated net worth ratio not greater than 1.5 to 1, a fixed charge coverage ratio of at least 1.1 to 1 if our short term investments fall below $150.0 million, and consolidated net worth of at least $450.0 million (with all such terms or amounts as defined in or determined under our credit facility). As of September 30, 2017, we believe we were in compliance with these covenants.

Letter of Credit Facility - We maintain a separate letter of credit facility that had $12.3 million and $13.0 million in letters of credit outstanding at September 30, 2017 and December 31, 2016 respectively. We have letters of credit securing our workers compensation policies, a traditional provider contract, and a bond relating to foreign operations.

We also have outstanding a letter of credit for $7.8 million issued under our $150.0 million credit facility that reduces the amount we can borrow under that facility. The letter of credit was issued to guaranty our performance under an international contract that was awarded in late 2016.

Other - Cash paid to fund interest expense under our outstanding indebtedness was $14.3 million for the quarter ended September 30, 2017 and $13.9 million for the quarter ended September 30, 2016. Cash paid to fund interest expense under our outstanding indebtedness was $29.5 million for the nine months ended September 30, 2017 and $28.3 million for the nine months ended September 30, 2016.

PHI, Inc. has cash management arrangements with certain of its principal subsidiaries, in which substantial portions of the subsidiaries’ cash is regularly advanced to PHI, Inc. Although PHI, Inc. periodically repays these advances to fund the subsidiaries’ cash requirements throughout the year, at any given point in time PHI, Inc. may owe a substantial sum to its subsidiaries under these advances, which, in accordance with generally accepted accounting principles, are eliminated in consolidation and therefore not recognized on our consolidated balance sheets. For additional information, see Note 13.