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Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Comprehensive Income Net Of Tax [Abstract] |  |  |
Unrealized holding gains (losses) on available-for-sale securities during the period, pre-tax |  | $ (14,934) | $ (12,217)
Reclassification adjustment for (gains) losses included in net income, pre-tax | [1] | (383) | (256)
Net other comprehensive income (loss), pre-tax |  | (15,317) | (12,473)
Unrealized holding gains (losses) on available-for-sale securities during the period, tax |  | 3,136 | 2,565
Reclassification adjustment for (gains) losses included in net income, tax | [1] | 81 | 54
Net other comprehensive income (loss), tax |  | 3,217 | 2,619
Unrealized holding (losses) on available-for-sale securities during the period |  | (11,798) | (9,652)
Reclassification adjustment for (gains) losses included in net income, after-tax | [1] | (302) | (202)
Other comprehensive (loss), net of tax |  | $ (12,100) | $ (9,854)
[1] | Pre-tax reclassification adjustments relating to available-for-sale securities are reported in security gains and the tax impact is included in income tax expense on the consolidated statements of income.

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