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Other Comprehensive Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Comprehensive Income Net Of Tax [Abstract] |  |  |  |  |
Unrealized holding gains on available-for-sale securities during the period, pre-tax |  | $ 5,946 | $ 5,020 | $ 6,321 | $ 8,377
Reclassification adjustment for (gains) losses included in net income, pre-tax | [1] | 14 | (41) | 1 | (41)
Net unrealized holding gains |  | 5,960 | 4,979 | 6,322 | 8,336
Net other comprehensive income (loss), pre-tax |  |  |  | 6,322 |
Unrealized holding gains on available-for-sale securities during the period, tax |  | (2,081) | (1,759) | (2,214) | (2,934)
Reclassification adjustment for (gains) losses included in net income, tax | [1] | (6) | 14 | (1) | 14
Net unrealized gains on available-for-sale securities, tax |  | (2,087) | (1,745) | (2,215) | (2,920)
Net other comprehensive income (loss), tax |  |  |  | (2,215) |
Unrealized holding gains on available-for-sale securities during the period, after-tax |  | 3,865 | 3,261 | 4,107 | 5,443
Reclassification adjustment for (gains) losses included in net income, after-tax | [1] | 8 | (27) | 0 | (27)
Net unrealized gains on available-for-sale securities, after-tax |  | 3,873 | 3,234 |  | 5,416
Other comprehensive income, net of tax |  | $ 3,873 | $ 3,234 | $ 4,107 | $ 5,416
[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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