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Securities (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
Cost Basis | $ 245,308 | $ 243,619
Gross Unrealized Gains | 1,235 | 3,879
Gross Unrealized Losses | (4,775) | (3,008)
Estimated Fair Value | 241,768 | 244,490
Municipal securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Cost Basis | 93,516 | 100,088
Gross Unrealized Gains | 1,072 | 3,709
Gross Unrealized Losses | (524) | (50)
Estimated Fair Value | 94,064 | 103,747
U.S. government sponsored entities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Cost Basis | 7,997 | 3,996
Gross Unrealized Gains | 28 | 0
Gross Unrealized Losses | (131) | (106)
Estimated Fair Value | 7,894 | 3,890
Collateralized mortgage obligations and residential mortgage-backed securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Cost Basis | 137,834 | 134,224
Gross Unrealized Gains | 135 | 170
Gross Unrealized Losses | (2,688) | (1,456)
Estimated Fair Value | 135,281 | 132,938
Collateralized Debt Obligations [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Cost Basis | 3,481 | 4,835
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (1,432) | (1,396)
Estimated Fair Value | 2,049 | 3,439
Money Market Funds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Cost Basis | 2,480 | 476
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Estimated Fair Value | $ 2,480 | $ 476

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