Mortgage indebtedness balances are subject to fixed and variable interest rates, which ranged from 3.84% to 6.30% as of December 31, 2019. Aggregate interest expense incurred under the mortgage loans payable totaled $15,804, and $15,050 and $12,405 during the years ended December 31, 2019, 2018, and 2017 respectively.

Our mortgage indebtedness contains various financial and non-financial covenants customarily found in secured, non-recourse financing arrangements. Our mortgage loans payable typically require that specified debt service coverage ratios be maintained with respect to the financed properties before we can exercise certain rights under the loan agreements relating to such properties. If the specified criteria are not satisfied, the lender may be able to escrow cash flow generated by the property securing the applicable mortgage loan. We have determined that all debt covenants contained in the loan agreements securing our hotel properties were met as of December 31, 2019.

We have two junior subordinated notes payable in the aggregate amount of $51,548 to the Hersha Statutory Trusts pursuant to indenture agreements which will mature on July 30, 2035, but may be redeemed at our option, in whole or in part, prior to maturity in accordance with the provisions of the indenture agreements. The $25,774 notes issued to Hersha Statutory Trust I and Hersha Statutory Trust II, bear interest at a variable rate of LIBOR plus 3% per annum. This rate resets two business days prior to each quarterly payment. The face value of the notes payable is offset by $812 and $864 as of December 31, 2019 and 2018, respectively, in net deferred financing costs incurred as a result of entering into these indentures. The deferred financing costs are amortized over the life of the notes payable. The weighted average interest rate on our two junior subordinated notes payable during the years ended December 31, 2019, 2018 and 2017 was 5.50%, 5.23% and 4.24%, respectively. Interest expense incurred on notes payable totaled $2,837, $2,695 and $2,358 for the years ended December 31, 2019, 2018 and 2017, respectively.

We maintain three unsecured credit agreements which aggregate to $950,900 with Citigroup Global Markets Inc., Wells Fargo Bank, Inc. and various other lenders. Our credit facility provides for a $457,000 senior unsecured credit facility (“Credit Facility”). The Credit Facility consists of a $250,000 senior unsecured revolving line of credit (“Line of Credit”), and a $207,000 senior unsecured term loan (“First Term Loan”). The Credit Facility expires on August 10, 2022, and, provided no event of default has occurred, we may request that the lenders renew the credit facility for an additional one- year period. The Credit Facility is also expandable to $857,000 at our request, subject to the satisfaction of certain conditions.

As of both December 31, 2019 and 2018, the Company had an outstanding balance on the term loans of $700,900 and $700,900, respectively. As of December 31, 2019 and 2018, the Company had an outstanding balance on the line of credit of $48,000 and $10,000.

The amount that we can borrow at any given time under our Line of Credit, and the First, Second and Third Term Loan (each a “Term Loan” and together the “Term Loans”) is governed by certain operating metrics of designated unencumbered hotel properties known as borrowing base assets. As of December 31, 2019, the following hotel properties were borrowing base assets:



- Courtyard by Marriott Brookline, Brookline, MA	- Hampton Inn, Washington, DC
- Holiday Inn Express Cambridge, Cambridge, MA	- Ritz-Carlton Georgetown, Washington, DC
- The Envoy Boston Seaport, Boston, MA	- Hilton Garden Inn, M Street, Washington, DC
- The Boxer, Boston, MA	- Residence Inn Miami Coconut Grove, Coconut Grove, FL
- Hampton Inn Seaport, Seaport, New York, NY	- The Winter Haven Hotel Miami Beach, Miami, FL
- The Duane Street Hotel, New York, NY	- The Blue Moon Hotel Miami Beach, Miami, FL
- Holiday Inn Express Chelsea, 29th Street, New York, NY	- Cadillac Hotel & Beach Club, Miami, FL
- Gate Hotel JFK Airport, New York, NY	- The Parrot Key Hotel & Villas, Key West, FL
- Hilton Garden Inn JFK Airport, New York, NY	- TownePlace Suites, Sunnyvale, CA
- NU Hotel, Brooklyn, New York, NY	- The Ambrose Hotel, Santa Monica, CA
- Hyatt House White Plains, White Plains, NY	- Courtyard by Marriott Downtown San Diego, San Diego, CA
- Hampton Inn Center City/ Convention Center, Philadelphia, PA	- The Pan Pacific Hotel Seattle, Seattle, WA
- The Rittenhouse, Philadelphia, PA	- Mystic Marriott Hotel & Spa, Groton, CT
- Philadelphia Westin, Philadelphia, PA	- Sheraton Wilmington South, New Castle, DE

The interest rate for borrowings under the Line of Credit and Term Loans are based on a pricing grid with a range of one month U.S. LIBOR plus a spread. The following table summarizes the balances outstanding and interest rate spread for each borrowing:



		Outstanding Balance
Borrowing	Spread	December 31, 2019			December 31, 2018
Line of Credit	1.50% to 2.25%	$	48,000		$	10,000
Unsecured Term Loan:
First Term Loan	1.45% to 2.20%	207,000			207,000
Second Term Loan	1.35% to 2.00%	300,000			300,000
Third Term Loan	1.45% to 2.20%	193,900			193,900
Deferred Loan Costs		$	(3,717	)	(2,698		)
Total Unsecured Term Loan		$	697,183		$	698,202

The Credit Facility and the Term Loans include certain financial covenants and require that we maintain: (1) a minimum tangible net worth (calculated as total assets, plus accumulated depreciation, less total liabilities, intangibles and other defined adjustments) of $1,119,500, plus an amount equal to 75% of the net cash proceeds of all issuances and primary sales of equity interests of the parent guarantor or any of its subsidiaries consummated following the closing date; (2) annual distributions not to exceed 95% of adjusted funds from operations; and (3) certain financial ratios, including the following:

The Company recorded interest expense of $33,563, $31,189 and $24,066 related to borrowings drawn on each of the aforementioned credit facilities, for the years ended December 31, 2019, 2018 and 2017, respectively. The weighted average interest rate on our credit facilities was 4.11%, 3.83% and 3.36% for the years ended December 31, 2019, 2018 and 2017, respectively.

We utilize cash, mortgage debt and our unsecured credit facility to finance on-going capital improvement projects at our hotels. Interest incurred on mortgages and the revolving credit facility that relates to our capital improvement projects is capitalized through the date when the assets are placed in service. For the years ended December 31, 2019, 2018 and 2017, we capitalized $74, $661 and $76 respectively, of interest expense related to these projects.

As noted above, costs associated with entering into mortgages, notes payable, unsecured term loan and our credit facilities are deferred and amortized over the life of the debt instruments. The deferred costs related to mortgages, term loans and unsecured notes payable are presented as reduction in the respective debt balances. Amortization of deferred costs for the years ended December 31, 2019, 2018 and 2017 was $2,241, $2,278 and $2,264 respectively.

On December 4, 2019, we refinanced the outstanding mortgage debt with an original principal balance of $44,325 secured by the Hilton Garden Inn, 52nd Street, NY. The loan was due to mature on February 24, 2020, but will now mature on December 4, 2022. Contemporaneous with the mortgage refinance, we entered into an interest rate swap that matures December 4, 2022 that fixes the interest rate at 3.84% until maturity.

On September 10, 2019, we refinanced our Second Term Loan. We maintained the $300,000 principal balance. The Second Term Loan was due to expire on August 10, 2020 but will now expire on September 10, 2024. The financial covenants on the new loan are substantially the same as the previous loan. Also during September 2019 we entered into new interest rate swap contracts for $700,900 of our Credit Facility and Term Loans. See "Note 8 - Fair Value Measurements and Derivative Instruments" for more information on the interest rate swaps.

On July 25, 2019, we refinanced the outstanding mortgage debt with an original principal balance of $45,000 secured by the Hilton Garden Inn Tribeca, New York, NY. The loan was due to mature on November 13, 2019, but will now mature on July 25, 2024. Contemporaneous with the mortgage refinance, we entered into an interest rate swap that matures July 25, 2024 that fixes the interest rate at 4.02% until maturity.

One June 7, 2019, we refinanced the outstanding mortgage debt with an original principal balance of $56,000 secured by the Hyatt Union Square, New York, NY. The loan was due to mature on June 9, 2019, but will now mature on June 7, 2023. Also on June 7, 2019, we entered into an interest rate swap that matures June 7, 2023. See "Note 8 - Fair Value Measurements and Derivative Instruments" for more information on the interest rate swap.

On April 13, 2018, we entered into a mortgage debt with a principal balance of $28,000 secured by the Annapolis Waterfront Hotel, MD. The loan bears interest at a variable rate of one month U.S. dollar LIBOR plus 2.65% and matures in April 2024. Concurrently, we entered into an interest rate cap which effectively caps LIBOR at 3.35%, limiting the interest rate to not exceed 6.00% per annum until May 2021.

On August 10, 2017, we amended and restated our existing credit facility, which now consists of a $250,000 senior unsecured revolving line of credit and a $225,000 senior unsecured term loan referred to above as the First Term Loan. The Credit Facility was due to expire on February 28, 2018, but will now expire on August 10, 2021. In conjunction with this transaction we recognized $280 in debt extinguishment costs.

On August 1, 2017, we refinanced the outstanding mortgage debt with an original principal balance of $35,000 secured by the Courtyard Culver City, Los Angeles, CA. The loan was due to mature on September 29, 2017, but will now mature on August 1, 2021. We incurred approximately $32 in expense in third party fees.

On February 24, 2017, we refinanced the outstanding mortgage debt with an original principal balance of $45,000 secured by the Hilton Garden Inn, 52^nd Street, NY. The loan was due to mature in May 2017, but will now mature on February 24, 2020. We incurred approximately $94 in expense in third party fees.

On January 31, 2017, we repaid in full outstanding mortgage debt with an original principal balance of $9,500 secured by the Duane Street Hotel, NY, which was schedule to mature on February 1, 2017 and we incurred approximately $12 in expense related to unamortized deferred financing costs and fees.

On January 6, 2017, we repaid in full outstanding mortgage debt secured by the Hyatt House Scottsdale, AZ, the Hyatt House Pleasant Hill, CA, and the Hyatt House Pleasanton, which all matured on that date. These properties had a combined original principal balance of $51,428 and we incurred approximately $47 in expense related to unamortized deferred financing costs and fees.

On January 3, 2017, we repaid in full outstanding mortgage debt with an original principal balance of $21,000 secured by the Hilton Garden Inn, JFK Airport, New York, NY. The loan was due to mature on March 7, 2017, and we incurred approximately $37 in expense related to unamortized deferred financing costs and fees.

On January 3, 2017, we repaid in full outstanding mortgage debt with an original principal balance of $43,000 secured by the Mystic Marriott Hotel & Spa, Groton, CT. The loan was due to mature in August of 2018, and we incurred approximately $84 in expense related to unamortized deferred financing costs and fees.