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Note 20 - Changes in Accumulated Other Comprehensive Income (Loss) by Component (Tables) | 12 Months Ended
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Dec. 31, 2022
Notes Tables |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
|  | Unrealized |  |  |  |  |  |  |  |  |
|  | Net Gain (Loss) |  |  | Retiree |  |  |  |  |
|  | on Interest |  |  | Health |  |  |  |  |
|  | Rate |  |  | Benefit |  |  |  |  |
|  | Swap |  |  | Obligation |  |  | Total |
Balance at December 31, 2021 |  | $ | (3,524 | ) |  | $ | 2,471 |  |  | $ | (1,053 | )
Other comprehensive gain before reclassifications |  |  | 8,587 |  |  |  | 838 |  |  |  | 9,425 |
Amounts reclassified from accumulated other comprehensive income (loss): (1) |  |  | 1,052 |  |  |  | (296 | ) |  |  | 756 |
Balance at December 31, 2022 |  | $ | 6,115 |  |  | $ | 3,013 |  |  | $ | 9,128 |
(1) Amounts reclassified from accumulated other comprehensive income (loss): |  |  |  |  |  |  |  |  |  |  |  |
Amortization of Other Postretirement Benefit items: |  |  |  |  |  |  |  |  |  |  |  |
Actuarial gains (a) |  | $ | (400 | ) |  |  |  |  |  |  |  |
Tax expense |  |  | 104 |  |  |  |  |  |  |  |  |
Reclassification net of tax |  | $ | (296 | ) |  |  |  |  |  |  |  |
Realized losses on interest rate swaps reclassified to interest expense |  | $ | 1,421 |  |  |  |  |  |  |  |  |
Tax expense |  |  | (369 | ) |  |  |  |  |  |  |  |
Reclassification net of tax |  | $ | 1,052 |  |  |  |  |  |  |  |  |
|  | Unrealized |  |  |  |  |  |  |  |  |
|  | Net Loss |  |  | Retiree |  |  |  |  |
|  | on Interest |  |  | Health |  |  |  |  |
|  | Rate |  |  | Benefit |  |  |  |  |
|  | Swap |  |  | Obligation |  |  | Total |
Balance at December 31, 2020 |  | $ | (7,608 | ) |  | $ | 2,113 |  |  | $ | (5,495 | )
Other comprehensive gain before reclassifications |  |  | 943 |  |  |  | 589 |  |  |  | 1,532 |
Amounts reclassified from accumulated other comprehensive income (loss): (1) |  |  | 3,141 |  |  |  | (231 | ) |  |  | 2,910 |
Balance at December 31, 2021 |  | $ | (3,524 | ) |  | $ | 2,471 |  |  | $ | (1,053 | )
(1) Amounts reclassified from accumulated other comprehensive income (loss): |  |  |  |  |  |  |  |  |  |  |  |
Amortization of Other Postretirement Benefit items: |  |  |  |  |  |  |  |  |  |  |  |
Actuarial gain (a) |  | $ | (312 | ) |  |  |  |  |  |  |  |
Tax expense |  |  | 81 |  |  |  |  |  |  |  |  |
Reclassification net of tax |  | $ | (231 | ) |  |  |  |  |  |  |  |
Realized losses on interest rate swaps reclassified to interest expense |  | $ | 4,244 |  |  |  |  |  |  |  |  |
Tax expense |  |  | (1,103 | ) |  |  |  |  |  |  |  |
Reclassification net of tax |  | $ | 3,141 |  |  |  |  |  |  |  |  |

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