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Note 19 - Changes in Accumulated Other Comprehensive Income by Component - Changes to Accumulated Other Comprehensive Income (Loss) by Component (Details) - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2025 | Jun. 30, 2024
Balance | $ 264,215 |  | $ 231,565 |
Balance | 273,264 |  | 236,657 |
Actuarial gains | (32) | [1] | (108) |
Tax expense | 8 |  | 28 |
Reclassification net of tax | (24) |  | (80) |
Realized gains on interest rate swaps reclassified to interest expense | (1,012) |  | (2,431) |
Tax expense | 263 |  | 632 |
Reclassification net of tax | (749) |  | (1,799) |
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] | Interest Rate Swap [Member] |  |  |  |
Balance | 1,836 |  | 3,331 |
Other comprehensive gain (loss) before reclassifications | (1,491) |  | 1,764 |
Amounts reclassified from accumulated other comprehensive income: (1) | 749 |  | (1,799) | [1]
Balance | 1,094 |  | 3,296 |
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] | Steel Hedging Instrument [Member] |  |  |  |
Balance | (40) |  |  |
Other comprehensive gain (loss) before reclassifications | 96 |  |  |
Amounts reclassified from accumulated other comprehensive income: (1) | 0 |  |  |
Balance | 56 |  |  |
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] |  |  |  |
Balance | 3,676 |  | 3,025 |
Other comprehensive gain (loss) before reclassifications | 0 |  | 0 |
Amounts reclassified from accumulated other comprehensive income: (1) | (24) |  | (80) |
Balance | 3,652 |  | 2,945 |
AOCI Attributable to Parent [Member] |  |  |  |
Balance | 5,472 |  | 6,356 |
Other comprehensive gain (loss) before reclassifications | (1,395) |  | 1,764 |
Amounts reclassified from accumulated other comprehensive income: (1) | 725 |  | (1,879) |
Balance | $ 4,802 |  | $ 6,241 |
[1] | These components are included in the computation of benefit plan costs in Note 12.

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