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Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Income Statement [Abstract] |  |  |
Securities transactions accumulated other comprehensive income reclassifications | $ 9 | $ (17) | $ 15
Unrealized losses on securities, tax | 139 | 861 | 897
Reclassification adjustment for gains included in net income, tax | 2 | (7) | 6
Other comprehensive gain (loss), tax | $ (64) | $ 854 | $ 903

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