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Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2017
Amortized intangible assets [Abstract] |  |  |  |  |  |
Gross carrying value | [1] | $ 3,633 |  | $ 3,633 |  | $ 3,516
Accumulated amortization | [1] | (1,930) |  | (1,930) |  | (1,563)
Net carrying value | [1] | 1,703 |  | 1,703 |  | 1,953
Unamortized intangible assets [Abstract] |  |  |  |  |  |
Goodwill |  | 23,296 |  | 23,296 |  | 23,296
Actual and Estimated Future Amortization Expense [Abstract] |  |  |  |  |  |
Amortization expense |  | 120 | $ 118 | 367 | $ 357 |
Estimated Amortization Expense [Abstract] |  |  |  |  |  |
Remaining 2018 |  | 114 |  | 114 |  |
2019 |  | 432 |  | 432 |  |
2020 |  | 334 |  | 334 |  |
2021 |  | 271 |  | 271 |  |
2022 |  | 211 |  | 211 |  |
MSRs [Member] |  |  |  |  |  |
Amortized intangible assets [Abstract] |  |  |  |  |  |
Gross carrying value | [1] | 1,722 |  | 1,722 |  | 1,605
Accumulated amortization | [1] | (1,055) |  | (1,055) |  | (912)
Net carrying value | [1] | 667 |  | 667 |  | 693
Actual and Estimated Future Amortization Expense [Abstract] |  |  |  |  |  |
Amortization expense |  | 46 | 44 | 143 | 134 |
Estimated Amortization Expense [Abstract] |  |  |  |  |  |
Remaining 2018 |  | 43 |  | 43 |  |
2019 |  | 173 |  | 173 |  |
2020 |  | 137 |  | 137 |  |
2021 |  | 106 |  | 106 |  |
2022 |  | 78 |  | 78 |  |
Core Deposit Intangibles [Member] |  |  |  |  |  |
Amortized intangible assets [Abstract] |  |  |  |  |  |
Gross carrying value | [1] | 1,786 |  | 1,786 |  | 1,786
Accumulated amortization | [1] | (786) |  | (786) |  | (586)
Net carrying value | [1] | 1,000 |  | 1,000 |  | 1,200
Actual and Estimated Future Amortization Expense [Abstract] |  |  |  |  |  |
Amortization expense |  | 66 | 66 | 200 | 200 |
Estimated Amortization Expense [Abstract] |  |  |  |  |  |
Remaining 2018 |  | 64 |  | 64 |  |
2019 |  | 230 |  | 230 |  |
2020 |  | 197 |  | 197 |  |
2021 |  | 165 |  | 165 |  |
2022 |  | 133 |  | 133 |  |
Covenant not to Compete [Member] |  |  |  |  |  |
Amortized intangible assets [Abstract] |  |  |  |  |  |
Gross carrying value | [1] | 125 |  | 125 |  | 125
Accumulated amortization | [1] | (89) |  | (89) |  | (65)
Net carrying value | [1] | 36 |  | 36 |  | $ 60
Actual and Estimated Future Amortization Expense [Abstract] |  |  |  |  |  |
Amortization expense |  | 8 | $ 8 | 24 | $ 23 |
Estimated Amortization Expense [Abstract] |  |  |  |  |  |
Remaining 2018 |  | 7 |  | 7 |  |
2019 |  | 29 |  | 29 |  |
2020 |  | 0 |  | 0 |  |
2021 |  | 0 |  | 0 |  |
2022 |  | $ 0 |  | $ 0 |  |
[1] | Excludes fully amortized intangible assets.

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