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Long-Term Debt (Tables) | 3 Months Ended
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Mar. 31, 2022
Debt Disclosure [Abstract] |
Outstanding Long-Term Debt | Our outstanding long-term debt is shown below:
|  | March 31, |  | December 31,
(in thousands) |  | 2022 |  | 2021
Uncollateralized senior notes: |  |  |  |
5.93% note, due October 31, 2023 |  | $ | 6,000 |  |  | $ | 6,000 |
5.68% note, due June 30, 2026 |  | 14,500 |  |  | 14,500 |
6.43% note, due May 2, 2028 |  | 4,900 |  |  | 4,900 |
3.73% note, due December 16, 2028 |  | 14,000 |  |  | 14,000 |
3.88% note, due May 15, 2029 |  | 40,000 |  |  | 40,000 |
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 |  |  | 50,000 |
2.95% notes Due March 15, 2042 |  | 50,000 |  |  | — |
Equipment security note |  |  |  |
2.46% note, due September 24, 2031 |  | 9,165 |  |  | 9,378 |
Less: debt issuance costs |  | (970) |  |  | (913) |
Total long-term debt |  | 617,595 |  |  | 567,865 |
Less: current maturities |  | (19,717) |  |  | (17,962) |
Total long-term debt, net of current maturities |  | $ | 597,878 |  |  | $ | 549,903 |
Schedule of Line of Credit Facilities [Line Items] |
Schedule of Line of Credit Facilities [Table Text Block] |
(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 |  |  | (50,000) |  |  | — |  |  | 100,000 |
Total Shelf Agreements as of March 31, 2022 |  | $ | 520,000 |  |  | $ | (270,000) |  |  | $ | — |  |  | $ | 250,000 |

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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- Definition Tabular disclosure of short-term or long-term contractual arrangements with lenders, including letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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