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Note 13 - Accumulated Other Comprehensive Income (Loss) - Reclassifications Out of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Net loss on sale of securities |  | $ (43) |  | $ (43) |
Income before income taxes |  | 13,402 | 11,566 | 25,663 | 23,002
Income tax expense |  | 2,951 | 2,500 | 5,581 | 5,068
Net income |  | 10,451 | 9,066 | 20,082 | 17,934
Net income |  | 89 | 56 | 144 | 112
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member] |  |  |  |  |
Income before income taxes | [1] | 64 | 55 | 128 | 114
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member] |  |  |  |  |
Income before income taxes |  | 6 | 16 | 11 | 28
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] |  |  |  |  |
Income before income taxes |  | 70 | 71 | 139 | 142
Reclassification out of Accumulated Other Comprehensive Income [Member] | AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member] |  |  |  |  |
Net loss on sale of securities |  | 43 |  | 43 |
Net impairment losses recognized in earnings |  |  |  |  |
Income before income taxes |  | 43 |  | 43 |
Income tax expense |  | 9 |  | 9 |
Net income |  | 34 |  | 34 |
Income tax expense |  | 15 | 15 | 29 | 30
Net income |  | $ 55 | $ 56 | $ 110 | $ 112
[1] | Amortization is included in net periodic pension cost. See Note 11, "Employee Benefit Plans."

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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109238882&loc=d3e38679-109324 + Details
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