As a member of the FHLB, the Bank can access a number of credit products which are utilized to provide liquidity. As of December 31, 2019 and 2018, the Bank had long-term debt outstanding in the amount of $32,903,000 and $48,024,000, respectively, consisting of FHLB fixed rate instruments, and, at December 31, 2019, a finance lease liability executed in 2019.

The FHLB fixed rate instruments are secured under the terms of a blanket collateral agreement with the FHLB consisting of FHLB stock and qualifying Mid Penn loan receivables, principally real estate secured loans. Mid Penn also obtains letters of credit from the FHLB to secure certain public fund deposits of municipality and school district customers who agree to use of the FHLB letters of credit. These FHLB letter of credit commitments totaled $169,051,000 as of December 31, 2019 and $36,850,000 as of December 31, 2018.

During the first quarter of 2019, Mid Penn entered into a lease agreement for one facility under a non-cancelable finance lease, which commenced March 1, 2019 and expires February 28, 2039 and is included in long-term debt on the Consolidated Balance Sheets. Please reference Note 9, Leases, for more information related to Mid Penn’s finance lease obligation.

The following table presents a summary of long-term debt as of December 31, 2019 and December 31, 2018.

(Dollars in thousands)	At December 31,
	2019			2018
FHLB fixed rate instruments:
Due July 2019, 1.64%	$	—		$	2,000
Due December 2019, 1.87%		—			10,000
Due January 2020, 3.00%		—			5,000
Due February 2020, 3.01%		—			5,000
Due March 2020, 3.02%		—			5,000
Due April 2020, 3.03%		—			5,000
Due June 2020, 1.72%		2,000			2,000
Due July 2020, 2.45%		5,000			—
Due August 2020, 3.05%		5,000			5,000
Due September 2020, 2.38%		2,500			—
Due October 2020, 3.06%		5,000			5,000
Due November 2020, 2.32%		3,000			—
Due December 2020, 1.78%		2,000			2,000
Due December 2020, 2.31%		3,000			—
Due August 2026, 4.80%		1,846			2,076
Due February 2027, 6.71%		47			52
Less: fair value adjustments on debt assumed in acquisitions		(41	)		(104	)
Total FHLB fixed rate instruments		29,352			48,024
Lease obligations included in long-term debt		3,551			—
Total long-term debt	$	32,903		$	48,024

During 2019, Mid Penn prepaid $20,000,000 of FHLB fixed rate instruments originally due in 2020 and recognized a prepayment penalty of $93,000 that is included in other expenses on the Consolidated Statement of Income for the year ended December 31, 2019. No prepayment penalties were recognized during the years ended December 31, 2018 or 2017.

The aggregate principal amounts due on FHLB fixed rate instruments subsequent to December 31, 2019 are $27,746,000 (2020), $258,000 (2021), $271,000 (2022), $284,000 (2023), $299,000 (2024) and $535,000 thereafter.