Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2021

Our outstanding long-term debt is shown below:


	As of December 31,
(in thousands)	2021		2020
Uncollateralized Senior Notes:
5.93% note, due October 31, 2023	$	6,000	$	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	14,000		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
2.49% notes Due January 25, 2037	50,000		—
Equipment security note
2.46% note, due September 24, 2031	9,378		—
Less: debt issuance costs	(913)		(901)
Total long-term debt	567,865		522,099
Less: current maturities	(17,962)		(13,600)
Total long-term debt, net of current maturities	$	549,903	$	508,499

Annual maturities and principal repayments of long-term debt are as follows:

The following table summarizes our shelf agreements at December 31, 2021:


(in thousands)	Total Borrowing Capacity		Less Amount of Debt Issued		Less Unfunded Commitments		Remaining Borrowing Capacity
Shelf Agreements (1)
Prudential Shelf Agreement	$	370,000	$	(220,000)	$	—	$	150,000
MetLife Shelf Agreement (2)	150,000		—		(50,000)		100,000
Total	$	520,000	$	(220,000)	$	(50,000)	$	250,000

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

(2) Unfunded commitments of $50 million reflects Senior Notes expected to be issued on or before March 15, 2022..