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Other Comprehensive Income (Loss) (Classifications out of AOCI) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Income Tax Expense | $ (2,748) | $ (2,484)
NET INCOME | 15,067 | 11,813
Total Reclassifications | 122 | 213
Unrealized Gains and Losses on Available-for-Sale Securities |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Total Reclassifications | 122 | 213
Amount Reclassified From Accumulated Other Comprehensive Income (Loss) |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Total Reclassifications | 122 | 213
Amount Reclassified From Accumulated Other Comprehensive Income (Loss) | Unrealized Gains and Losses on Available-for-Sale Securities |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Net Gains on Securities | 155 | 270
Income Tax Expense | (33) | (57)
NET INCOME | $ 122 | $ 213

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