

	As of June 30, 2020
	Principal		Unamortized Net Premiums		Unamortized Debt Issuance Costs			Total
Senior unsecured notes—fixed rate	$	550,000	$	—	$	(3,838	)	$	546,162
Unsecured revolving credit facility	200,000		—		(2,165		)	197,835
Unsecured term loan	250,000		—		(1,753		)	248,247
Mortgage notes payable—fixed rate	296,728		1,955		(33		)	298,650
Mortgage note payable—variable rate	55,470		—		(109		)	55,361
Total mortgage and other indebtedness	$	1,352,198	$	1,955	$	(7,898	)	$	1,346,255



	As of December 31, 2019
	Principal		Unamortized Net Premiums		Unamortized Debt Issuance Costs			Total
Senior unsecured notes - fixed rate	$	550,000	$	—	$	(4,231	)	$	545,769
Unsecured revolving credit facility	—		—		(2,625		)	(2,625		)
Unsecured term loans	250,000		—		(1,859		)	248,141
Mortgage notes payable - fixed rate	297,472		2,176		(40		)	299,608
Mortgage notes payable - variable rate	55,830		—		(143		)	55,687
Total mortgage and other indebtedness	$	1,153,302	$	2,176	$	(8,898	)	$	1,146,580

Consolidated indebtedness, including weighted average maturities and weighted average interest rates as of June 30, 2020, considering the impact of interest rate swaps, is summarized below:



	Outstanding Amount			Ratio		Weighted Average Interest Rate		Weighted Average Maturity (in years)
Fixed Rate Debt ¹	$	1,096,729		81	%	4.17	%	5.5
Variable Rate Debt	255,470			19	%	1.41	%	2.2
Net Debt Premiums and Issuance Costs, Net	(5,944		)	N/A		N/A		N/A
Total	$	1,346,255		100	%	3.65	%	4.8



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1	Fixed rate debt includes, and variable rate date excludes, the portion of such debt that has been hedged by interest rate derivatives. As of June 30, 2020, $250 million in variable rate debt is hedged for a weighted average of 2.7 years.

Mortgage indebtedness is collateralized by certain real estate properties and leases, and is generally due in monthly installments of interest and principal and matures over various terms through 2030.

Variable interest rates on mortgage indebtedness is based on LIBOR plus 160 basis points. At June 30, 2020, the one-month LIBOR interest rate was 0.16%. Fixed interest rates on mortgage indebtedness range from 3.78% to 5.73%.

The accompanying consolidated statements of operations include amortization of debt issuance costs as a component of interest expense as follows:

As of June 30, 2020, we had an unsecured revolving credit facility (the "Credit Facility") with a total commitment of $600 million that matures in April 2023 (inclusive of one twelve-month extension option).

The Operating Partnership has the option to increase the borrowing availability of the Credit Facility to $1.2 billion, subject to certain conditions, including obtaining commitments from lenders.

On October 25, 2018, the Operating Partnership entered into a Term Loan Agreement (the “Agreement”) with KeyBank National Association, as Administrative Agent (the “Agent”), and the other lenders party thereto, providing for an unsecured term loan facility of up to $250 million (the “Term Loan”). The Term Loan ranks pari passu with the Operating Partnership’s existing $600 million unsecured revolving credit facility documented in the Operating Partnership’s Fifth Amended and Restated Credit Agreement, dated as of July 28, 2016, as amended (the “Existing Credit Agreement”), and other unsecured indebtedness of the Operating Partnership.

The Term Loan has a scheduled maturity date of October 24, 2025, which maturity date may be extended for up to three additional periods of one year at the Operating Partnership’s option subject to certain conditions.

The Operating Partnership has the option to increase the Term Loan to $300 million, subject to certain conditions, including obtaining commitments from any one or more lenders, whether or not currently party to the Agreement, to provide such increased amounts. The Operating Partnership is permitted to prepay the Term Loan in whole or in part, at any time, subject to a prepayment fee if prepaid on or before October 25, 2023.

In March 2020, we borrowed $300 million on the Credit Facility as a precautionary measure in order to increase our cash position and preserve financial flexibility in light of current uncertainty in the global markets resulting from the COVID-19 pandemic. Proceeds from the Credit Facility borrowings may in the future be used for working capital, general corporate or other purposes permitted under the Credit Facility. In June 2020, we repaid $100 million on the Credit Facility. As of June 30, 2020, there was $200 million outstanding under the Credit Facility. Additionally, we had letters of credit outstanding which totaled $1.2 million, against which no amounts were advanced as of June 30, 2020.

The amount that we may borrow under our Credit Facility is limited by the value of the assets in our unencumbered asset pool. As of June 30, 2020, the value of the assets in our unencumbered asset pool, calculated pursuant to the Credit Facility agreement, was $1.4 billion. Considering outstanding borrowings on the line of credit, term loans, unsecured notes and letters of credit, we had $354.2 million available under our Credit Facility for future borrowings as of June 30, 2020.

Our ability to borrow under the Credit Facility is subject to our compliance with various restrictive and financial covenants, including with respect to liens, indebtedness, investments, dividends, mergers and asset sales. As of June 30, 2020, we were in compliance with all such covenants.

The Operating Partnership has $550 million of senior unsecured notes maturing at various dates through September 2027 (the "Notes"). The Notes contain a number of customary financial and restrictive covenants. As of June 30, 2020, we were in compliance with all such covenants.