DEBT

Debt consists of the following (in thousands):



	June 30, 2015		December 31, 2014
Revolving credit facility - unsecured	$	101,000	$	374,000
Convertible senior notes - unsecured (net of discount of $6,418)	193,582		193,037
Bank term loans - unsecured	250,000		250,000
HUD mortgage loans (net of discount of $1,618)	45,366		45,689
Private placement term loans - unsecured	225,000		—
Fannie Mae term loans - secured, non-recourse	78,084		—
	$	893,032	$	862,726

Aggregate principal maturities of debt as of June 30, 2015 for each of the next five years and thereafter are as follows (in thousands):



Twelve months ended June 30
2016	$	755
2017	781
2018	808
2019	101,835
2020	250,864
Thereafter	546,025
	901,068
Less: discount	(8,036		)
	$	893,032

In June 2015 we entered into an amended $800,000,000 senior unsecured credit facility with a group of banks. The facility can be expanded, subject to certain conditions, up to an additional $250,000,000. The amended credit facility provides for: (1) a $550,000,000 unsecured, revolving credit facility that matures in June 2020 (inclusive of an embedded 1-year extension option) with interest at 150 basis points over LIBOR (19 bps at June 30, 2015); (2) a $130,000,000 unsecured term loan that matures in June 2020 with interest at 175 basis points over LIBOR; and (3) two existing term loans which remain in place totaling $120,000,000, maturing in June 2020 and bearing interest at 175 basis points over LIBOR. At closing, the new facility replaced a smaller credit facility last amended in March 2014 that provided for $700,000,000 of total commitments. The employment of interest rate swaps for our fixed term debt leaves only our revolving credit facility exposed to variable rate risk. Our swaps and the financial instruments to which they relate are described in the table below, under the caption “Interest Rate Swap Agreements.”

At June 30, 2015 we had $449,000,000 available to draw on the revolving portion of the credit facility. The unused commitment fee is 40 basis points per annum. The unsecured credit facility requires that we maintain certain financial ratios within limits set by our creditors. To date, these ratios, which are calculated quarterly, have been within the limits required by the credit facility agreements.

In March 2015 we obtained $78,084,000 in Fannie Mae financing through KeyBank National Association. The term debt financing consists of interest-only payments at an annual rate of 3.79% and a 10-year maturity. The mortgages are non-recourse and secured by thirteen properties in NHI’s joint venture with Bickford. Proceeds were used to reduce borrowings on NHI's unsecured bank credit facility. The notes are secured by the facilities previously pledged as security on Fannie Mae term debt that was retired in December 2014.

In January 2015 we issued $125,000,000 of 8-year notes with a coupon of 3.99% and $100,000,000 of 12-year notes with a coupon of 4.51% to a private placement lender. The notes are unsecured and require quarterly payments of interest only until maturity. We used the proceeds from the notes to pay down borrowings on our revolving credit facility. Terms and conditions of the new financing are similar to those under our bank credit facility with the exception of provisions regarding prepayment premiums.

In March 2014 we issued $200,000,000 of 3.25% senior unsecured convertible notes due April 2021 (the "Notes"). Interest is payable April 1st and October 1st of each year. The Notes are convertible at an initial conversion rate of 13.926 shares of common stock per $1,000 principal amount, representing a conversion price of approximately $71.81 per share for a total of approximately 2,785,200 underlying shares. The conversion rate is subject to adjustment upon the occurrence of certain events, as defined in the indenture governing the Notes, but will not be adjusted for any accrued and unpaid interest except in limited circumstances. The conversion option is considered an "optional net-share settlement conversion feature," meaning that upon conversion, NHI's conversion obligation may be satisfied, at our option, in cash, shares of common stock or a combination of cash and shares of common stock. Our average stock price in for the second quarter of 2015 is less than the conversion price, making the conversion option anti-dilutive for the three months ended June 30, 2015. For the year-to-date period, 2015 dilution is determined by computing an average of incremental shares included in each quarterly diluted EPS computation, resulting in a dilutive effect of the conversion feature of 9,471 shares for the six months ended June 30, 2015.

The embedded conversion options (1) do not require net cash settlement, (2) are not conventionally convertible but can be classified in stockholders’ equity under ASC 815-40, and (3) are considered indexed to NHI’s own stock. Therefore, the conversion feature satisfies the conditions to qualify for an exception to the derivative liability rules, and the Notes are split into debt and equity components. The value of the debt component is based upon the estimated fair value of a similar debt instrument without the conversion feature at the time of issuance and was estimated to be approximately $192,238,000. The $7,762,000 difference between the contractual principal on the debt and the value allocated to the debt was recorded as an equity component and represents the estimated value of the conversion feature of the instrument. The excess of the contractual principal amount of the debt over its estimated fair value, the original issue discount, is amortized to interest expense using the effective interest method over the estimated term of the Notes. The effective interest rate used to amortize the debt discount and the liability component of the debt issue costs was approximately 3.9% based on our estimated non-convertible borrowing rate at the date the Notes were issued.

The total cost of issuing the Notes was $6,063,000, $275,000 of which was allocated to the equity component and $5,788,000 of which was allocated to the debt component and subject to amortization over the estimated term of the notes. The remaining unamortized balance at June 30, 2015, was $4,629,000.

Our HUD mortgage loans are secured by ten properties in our joint venture with Bickford. Nine mortgage notes require monthly payments of principal and interest from 4.65% to 4.75% in the first year and from 4.3% to 4.4% thereafter (inclusive of mortgage insurance premium) and mature in August and October 2049. One additional HUD mortgage loan assumed in 2014 requires monthly payments of principal and interest of 2.9% (inclusive of mortgage insurance premium) and matures in October 2047. The loan has an outstanding principal balance of $9,408,000 and a net book value of $7,790,000, which approximates fair value.

The following table summarizes interest expense (in thousands):



	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2015			2014			2015			2014
Interest expense at contractual rates	$	8,511		$	6,178		$	16,223		$	10,700
Capitalized interest	(84		)	(88		)	(204		)	(211		)
Amortization of debt issuance costs and debt discount	860			739			1,680			1,081
Debt issuance costs expensed due to credit facility modifications	—			—			—			2,145
Total interest expense	$	9,287		$	6,829		$	17,699		$	13,715

Interest Rate Swap Agreements

To mitigate our exposure to interest rate risk, we have entered into the following interest rate swap contracts on our bank term loans as of June 30, 2015 (dollars in thousands):



Date Entered	Maturity Date	Fixed Rate	Rate Index	Notional Amount		Fair Value
May 2012	April 2019	3.29%	1-month LIBOR	$	40,000	$	(339	)
June 2013	June 2020	3.86%	1-month LIBOR	$	80,000	$	(2,045	)
March 2014	June 2020	3.91%	1-month LIBOR	$	130,000	$	(3,637	)

See Note 11 for fair value disclosures about our variable and fixed rate debt and interest rate swap agreements.