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Note 17 - Changes in Accumulated Other Comprehensive Income (Loss) by Component - Changes to Accumulated Other Comprehensive Income (Loss) by Component (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022
Balance | $ 9,128 |  | $ (1,053)
Other comprehensive loss before reclassifications | (871) |  | 3,517
Amounts reclassified from accumulated other comprehensive income (loss): (1) | (718) |  | 721
Balance | 7,539 |  | 3,185
Actuarial gains | (72) | [1] | (55)
Tax expense | 19 |  | 14
Reclassification net of tax | (53) |  | (41)
Realized gains on interest rate swaps reclassified to interest expense | (899) |  | 1,030
Tax expense | 234 |  | (268)
Reclassification net of tax | (665) |  | 762
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] |  |  |
Balance | 6,115 |  | (3,524)
Other comprehensive loss before reclassifications | (871) |  | 3,517
Amounts reclassified from accumulated other comprehensive income (loss): (1) | (665) |  | 762
Balance | 4,579 |  | 755
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] |  |  |
Balance | 3,013 |  | 2,471
Other comprehensive loss before reclassifications | 0 |  | 0
Amounts reclassified from accumulated other comprehensive income (loss): (1) | (53) |  | (41)
Balance | $ 2,960 |  | $ 2,430
[1] | These components are included in the computation of benefit plan costs in Note 13.

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