4. Debt

At September 30, 2016, our borrowings consisted of the following (dollars in thousands):

	Total
Revolving credit facility	$	206,667
Mortgage notes payable, net		81,552
Total	$	288,219

a. Senior Unsecured Revolving Credit Facility

We have a $400.0 million senior unsecured revolving credit facility with an accordion feature that provides us with additional capacity, subject to the satisfaction of customary terms and conditions, of up to $250.0 million, for a total facility size of not more than $650.0 million.

As of September 30, 2016, the interest rate payable on borrowings under our senior unsecured revolving credit facility was 1.93%. For the nine months ended September 30, 2016 the weighted average annual interest rate for borrowings under our senior unsecured revolving credit facility was 1.86%. As of September 30, 2016, we had $206.7 million outstanding and $193.3 million available under our senior unsecured revolving credit facility and recognized $0.6 million in accumulated amortization of deferred financing costs.

As of September 30, 2016, the carrying value of our senior unsecured revolving credit facility approximated fair value. In determining the fair value we considered the short term maturity and variable interest rate. We deem the fair value of our senior unsecured revolving credit facility as a Level 3 measurement.

b. Mortgage Notes Payable, Net

The table below provides a summary of our mortgage debt which is collateralized by the underlying real estate at September 30, 2016 (dollars in thousands):

Property	Fixed/ Floating	Contractual Interest Rate			Effective Interest Rate			Maturity Date	Principal Balance		Premium/ Discount			Deferred Financing			Carrying Value
CBP - Savannah	Fixed		3.40	%		4.12	%	July 2033	$	15,078	$	(795	)	$	—		$	14,283
ICE - Charleston	Fixed		4.21	%		3.93	%	January 2027		21,194		368			—			21,562
MEPCOM - Jacksonville	Fixed		4.41	%		3.89	%	October 2025		11,872		286			—			12,158
USFS II - Albuquerque	Fixed		4.46	%		3.92	%	July 2026		17,264		622			—			17,886
DEA - Pleasanton	Floating	LIBOR + 150bps				1.80	%	October 2023		15,700		—			(37	)		15,663
Total									$	81,108	$	481		$	(37	)	$	81,552

At September 30, 2016, the fair value of our mortgage debt was determined by discounting future contractual principal and interest payments using prevailing market rates. We deem the fair value measurement of our debt instruments as a Level 3 measurement. At September 30, 2016 the fair value of our mortgage debt was $83.4 million.

c. Senior Unsecured Term Loan Facility

On September 29, 2016, we entered into a $100.0 million senior unsecured term loan facility (our “senior unsecured term loan facility”) with PNC Bank, National Association, as administrative agent, U.S. Bank National Association and SunTrust Bank, as syndication agents, PNC Capital Markets LLC, U.S. Bank National Association and SunTrust Robinson Humphrey, Inc., as joint lead arrangers and joint bookrunners.

The Operating Partnership is the borrower under our senior unsecured term loan facility and we and certain of our subsidiaries that directly own certain of our properties are guarantors under the term loan facility. The senior unsecured term loan facility matures on September 29, 2023, has a 180-day delayed draw period, and is prepayable without penalty beginning in October 2018.

Borrowings under our senior unsecured term loan facility will bear interest at floating rates equal to, at our option, either (1) a fluctuating rate equal to the sum of (a) the highest of (x) PNC Bank, National Association’s base rate, (y) the federal funds open rate plus 0.50% and (z) the daily Eurodollar rate plus 1.00% plus (b) a margin ranging from 0.7% to 1.35%, or (2) a Eurodollar rate equal to a periodic fixed rate equal to LIBOR plus, a margin ranging from 1.7% to 2.35%, in each case with a margin based on our leverage ratio. Based on our current leverage ratio, borrowings under our senior unsecured term loan facility will have an initial interest rate of LIBOR plus 170 basis points. We may prepay our senior unsecured term loan facility in whole or in part, subject to (i) customary costs, if any, of breaking LIBOR and, (ii) payment of a prepayment penalty equal to 2.0% of the principal balance being repaid during the first 12 months of our senior unsecured term loan facility and 1.0% of the principal balance being repaid during the following 12 months.

Our senior unsecured term loan facility also contains certain customary covenants, including but not limited to financial covenants that require us to maintain maximum ratios of consolidated total indebtedness, consolidated secured indebtedness and consolidated secured recourse indebtedness to total asset value, minimum consolidated tangible net worth and a minimum consolidated fixed charge ratio.

As of September 30, 2016 we have not drawn funds under our senior unsecured term loan facility.