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Investment Securities - Securities Gains and Losses (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Investments, Debt and Equity Securities [Abstract] |  |  |
Proceeds from sales of securities available for sale | $ 459 | $ 15,587 | $ 10,309
Gross realized gains | 137 |  |
Gross realized gains |  | 471 | 673
Gross realized losses | 0 |  |
Gross realized losses |  | 0 | 0
Net gain | 137 |  |
Net gain | 137 | 471 | 673
Related income taxes | $ 29 | $ 165 | $ 236

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- Definition Amount of unrealized and realized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity), investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) and investment in debt security measured at fair value with change in fair value recognized in net income (trading). + References No definition available. + Details
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