Long-Term Debt

9 Months Ended

Sep. 30, 2021

Our outstanding long-term debt is shown below:


	September 30,		December 31,
(in thousands)	2021		2020
Uncollateralized senior notes:
5.93% note, due October 31, 2023	$	7,500	$	9,000
5.68% note, due June 30, 2026	14,500		17,400
6.43% note, due May 2, 2028	4,900		5,600
3.73% note, due December 16, 2028	16,000		16,000
3.88% note, due May 15, 2029	40,000		45,000
3.25% note, due April 30, 2032	70,000		70,000
3.48% note, due May 31, 2038	50,000		50,000
3.58% note, due November 30, 2038	50,000		50,000
3.98% note, due August 20, 2039	100,000		100,000
2.98% note, due December 20, 2034	70,000		70,000
3.00% note, due July 15, 2035	50,000		50,000
2.96% note, due August 15, 2035	40,000		40,000
Equipment security note
2.46% note, due September 29, 2031	9,590		—
Less: debt issuance costs	(825)		(901)
Total long-term debt	521,665		522,099
Less: current maturities	(16,206)		(13,600)
Total long-term debt, net of current maturities	$	505,459	$	508,499

Notes Purchase Agreement

On August 25, 2021, we entered into a Note Purchase Agreement (“Note Agreement”) with multiple lenders to issue $50.0 million in uncollateralized senior notes. Under the Note Agreement, we will issue the senior notes on January 25, 2022 at a rate of 2.49 percent for a 15-year term. These senior notes, when issued, will have similar covenants and default provisions as the existing senior notes, and will have an annual principal payment beginning in the sixth year after the issuance. The proceeds received from the issuances of the senior notes will be used to reduce our short-term borrowings under our lines of credit and to fund capital expenditures.

Equipment Security Note

On September 24, 2021, we entered into an Equipment Financing Agreement with Banc of America Leasing & Capital, LLC to issue $9.6 million in sustainable financing to finance the purchase of equipment by our subsidiary, Marlin Gas Services. The equipment security note bears a 2.46 percent interest rate and has a term of ten years. Under the terms of the agreement, we granted a security interest in the equipment to the lender, to serve as collateral.

Shelf Agreements

We have entered into Shelf Agreements with Prudential, MetLife and NYL, whom are under no obligation to purchase any unsecured debt. The following table summarizes our Shelf Agreements at September 30, 2021:


(in thousands)	Total Borrowing Capacity		Less: Amount of Debt Issued		Less: Unfunded Commitments		Remaining Borrowing Capacity
Shelf Agreement
Prudential Shelf Agreement (1)	$	370,000	$	(220,000)	$	—	$	150,000
MetLife Shelf Agreement (1)	150,000		—		—		150,000
NYL Shelf Agreement (1)	150,000		(140,000)		—		10,000
Total Shelf Agreements as of September 30, 2021	$	670,000	$	(360,000)	$	—	$	310,000

(1) The Prudential, MetLife and NYL Shelf Agreements expire in April 2023, May 2023 and November 2021, respectively.

The Uncollateralized Senior Notes, Shelf Agreements or Shelf Notes set forth certain business covenants to which we are subject when any note is outstanding, including covenants that limit or restrict our ability, and the ability of our subsidiaries, to incur indebtedness, or place or permit liens and encumbrances on any of our property or the property of our subsidiaries.