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Accumulated Other Comprehensive Income (Details 2) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |
Net securities gains (losses) | $ (4) | $ 0
Income tax expense | (2,217) | (1,939)
Unrealized gain (loss) on securities, net of tax | 9,682 | 8,953
Change in funded status of post retirement benefits | 303 | 281
Reclassification out of Accumulated Other Comprehensive Income [Member] |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |
Unrealized gain (loss) on securities, net of tax | (306) | (281)
Accumulated Net Unrealized Investment Gain (Loss) [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |
Net securities gains (losses) | (4) | 0
Income tax expense | 1 | 0
Unrealized gain (loss) on securities, net of tax | (3) | 0
Accumulated Defined Benefit Plans Adjustment [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |
Income tax expense | 86 | 81
Unrealized gain (loss) on securities, net of tax | (303) | (281)
Change in funded status of post retirement benefits | $ (389) | $ (362)

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