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Comprehensive Income (Tables) | 3 Months Ended
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Mar. 31, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | The following table represents the reclassification out of accumulated other comprehensive (loss) income for the periods presented:
Details about Accumulated Other |  | Amounts Reclassified from Accumulated |  | Affected Line item in the
Comprehensive Loss Components |  | Other Comprehensive Income (Loss) |  | Statement Where Net Income is Presented
|  | Three Months Ended |  |
|  | March 31, |  |
|  | 2021 |  | 2020 |  |
|  | (dollars in thousands) |  |
Sale of investment securities |  | $ | - |  |  | $ | 29 |  |  | Net losses on sale of securities available-for-
available for sale |  |  | - |  |  |  | (6 | ) |  | sale Income tax benefit
|  |  | - |  |  |  | 23 |  |  |
Net interest income on swaps |  | $ | (631 | ) |  | $ | 7 |  |  | Borrowings
|  |  | 177 |  |  |  | (2 | ) |  | Income tax expense
|  |  | (454 | ) |  |  | 5 |  |  |
Amortization of pension plan net |  |  | (75 | ) |  |  | (75 | ) |  | Other components of net periodic pension
actuarial losses |  |  | 20 |  |  |  | 21 |  |  | expense Income tax benefit
|  |  | (55 | ) |  |  | (54 | ) |  |
Total reclassification |  | $ | (509 | ) |  | $ | (26 | ) |  |
Comprehensive Income (Loss) [Table Text Block] | Accumulated other comprehensive (loss) income as of March 31, 2021 and December 31, 2020 consisted of the following:
|  | March 31, |  | December 31,
|  | 2021 |  | 2020
|  | (dollars in thousands)
Investment securities available-for-sale, net of tax |  | $ | 3,851 |  |  | $ | 7,859 |
Cash flow hedge, net of tax |  |  | (1,053 | ) |  |  | (1,520 | )
Defined benefit pension and post-retirement plans, net of tax |  |  | (3,487 | ) |  |  | (3,542 | )
Total |  | $ | (689 | ) |  | $ | 2,797 |

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=124509347&loc=SL7669686-108580 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900 + Details
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- Definition Tabular disclosure of components of comprehensive income (loss). Includes, but is not limited to, foreign currency translation adjustments, foreign currency transactions designated as economic hedges of a net investment in foreign entity, gain (loss) and prior service cost (credit) for pension plans and other postretirement benefit plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124509347&loc=d3e526-108580 + Details
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