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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 | 6 Months Ended
--- | ---
Jun. 30, 2023 | Jun. 30, 2022
Balance | $ 9,128 |  | $ (1,053)
Other comprehensive gain before reclassifications | 1,401 |  | 4,443
Amounts reclassified from accumulated other comprehensive income (loss): (1) | (1,623) |  | 1,247
Balance | 8,906 |  | 4,637
Actuarial gains | (144) | [1] | (110)
Tax expense | 37 |  | 28
Reclassification net of tax | (107) |  | (82)
Realized gains on interest rate swaps reclassified to interest expense | (2,048) |  | 1,796
Tax expense | 532 |  | (467)
Reclassification net of tax | (1,516) |  | 1,329
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] |  |  |
Balance | 6,115 |  | (3,524)
Other comprehensive gain before reclassifications | 1,401 |  | 4,443
Amounts reclassified from accumulated other comprehensive income (loss): (1) | (1,516) |  | 1,329
Balance | 6,000 |  | 2,248
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] |  |  |
Balance | 3,013 |  | 2,471
Other comprehensive gain before reclassifications | 0 |  | 0
Amounts reclassified from accumulated other comprehensive income (loss): (1) | (107) |  | (82)
Balance | $ 2,906 |  | $ 2,389
[1] | These components are included in the computation of benefit plan costs in Note 13.

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- Definition Amount, before tax, of reclassification adjustment from accumulated other comprehensive (income) loss for net period benefit cost (credit) of defined benefit plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 15 -SubTopic 10 -Topic 220 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482790/220-10-45-15 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482790/220-10-45-11 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 17A -Publisher FASB -URI https://asc.fasb.org//1943274/2147482790/220-10-45-17A + Details
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