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Comprehensive Income (Tables) | 9 Months Ended
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Sep. 30, 2019
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 Comprehensive Loss Components |  | Amounts Reclassified from Accumulated Other Comprehensive Income |  | Affected Line item in the Statement Where Net Income is Presented
|  | Three Months Ended September 30, |  | Nine Months Ended September 30, |  |
|  | 2019 |  | 2018 |  | 2019 |  | 2018 |  |
|  |  | (dollars in thousands) |  |  |
Sale of investment securities available for sale |  | $ | (279 | ) |  | $ | - |  |  | $ | (280 | ) |  | $ | - |  |  | Net losses on sale of securities available-for-sale
|  |  | 62 |  |  |  | - |  |  |  | 62 |  |  |  | - |  |  | Income tax benefit
|  |  | (217 | ) |  |  | - |  |  |  | (218 | ) |  |  | - |  |  |
Net interest income on swaps |  |  | 204 |  |  |  | - |  |  |  | 563 |  |  |  | - |  |  | Borrowings
|  |  | (46 | ) |  |  | - |  |  |  | (125 | ) |  |  | - |  |  | Income tax expense
|  |  | 158 |  |  |  | - |  |  |  | 438 |  |  |  | - |  |  |
Amortization of pension plan net actuarial losses |  |  | (90 | ) |  |  | (91 | ) |  |  | (269 | ) |  |  | (274 | ) |  | Other components of net periodic pension expense
|  |  | 26 |  |  |  | 26 |  |  |  | 76 |  |  |  | 77 |  |  | Income tax benefit
|  |  | (64 | ) |  |  | (65 | ) |  |  | (193 | ) |  |  | (197 | ) |  |
Total reclassification |  | $ | (123 | ) |  | $ | (65 | ) |  | $ | (27 | ) |  | $ | (197 | ) |  |
Comprehensive Income (Loss) [Table Text Block] |
| September 30, 2019 |  | December 31, 2018
|  | (dollars in thousands) |
Investment securities available-for-sale, net of tax | $ | 3,138 |  |  | $ | (5,841 | )
Cash flow hedge, net of tax |  | (270 | ) |  |  | 837 |
Defined benefit pension and post-retirement plans, net of tax |  | (3,996 | ) |  |  | (3,785 | )
Total | $ | (1,128 | ) |  | $ | (8,789 | )

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: 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=118930883&loc=SL7669686-108580 + 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=118930883&loc=d3e526-108580 + Details
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