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Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017
Amortized intangible assets [Abstract] |  |  |  |  |  |
Gross carrying value | [1] | $ 3,567 |  | $ 3,567 |  | $ 3,516
Accumulated amortization | [1] | (1,811) |  | (1,811) |  | (1,563)
Net carrying value | [1] | 1,756 |  | 1,756 |  | 1,953
Unamortized intangible assets [Abstract] |  |  |  |  |  |
Goodwill |  | 23,296 |  | 23,296 |  | 23,296
Actual and Estimated Future Amortization Expense [Abstract] |  |  |  |  |  |
Amortization expense |  | 122 | $ 118 | 247 | $ 240 |
Estimated Amortization Expense [Abstract] |  |  |  |  |  |
Remaining 2018 |  | 233 |  | 233 |  |
2019 |  | 416 |  | 416 |  |
2020 |  | 320 |  | 320 |  |
2021 |  | 259 |  | 259 |  |
2022 |  | 202 |  | 202 |  |
MSRs [Member] |  |  |  |  |  |
Amortized intangible assets [Abstract] |  |  |  |  |  |
Gross carrying value | [1] | 1,656 |  | 1,656 |  | 1,605
Accumulated amortization | [1] | (1,009) |  | (1,009) |  | (912)
Net carrying value | [1] | 647 |  | 647 |  | 693
Actual and Estimated Future Amortization Expense [Abstract] |  |  |  |  |  |
Amortization expense |  | 48 | 45 | 97 | 91 |
Estimated Amortization Expense [Abstract] |  |  |  |  |  |
Remaining 2018 |  | 88 |  | 88 |  |
2019 |  | 157 |  | 157 |  |
2020 |  | 123 |  | 123 |  |
2021 |  | 94 |  | 94 |  |
2022 |  | 69 |  | 69 |  |
Core Deposit Intangibles [Member] |  |  |  |  |  |
Amortized intangible assets [Abstract] |  |  |  |  |  |
Gross carrying value | [1] | 1,786 |  | 1,786 |  | 1,786
Accumulated amortization | [1] | (721) |  | (721) |  | (586)
Net carrying value | [1] | 1,065 |  | 1,065 |  | 1,200
Actual and Estimated Future Amortization Expense [Abstract] |  |  |  |  |  |
Amortization expense |  | 66 | 66 | 134 | 134 |
Estimated Amortization Expense [Abstract] |  |  |  |  |  |
Remaining 2018 |  | 130 |  | 130 |  |
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] | (81) |  | (81) |  | (65)
Net carrying value | [1] | 44 |  | 44 |  | $ 60
Actual and Estimated Future Amortization Expense [Abstract] |  |  |  |  |  |
Amortization expense |  | 8 | $ 7 | 16 | $ 15 |
Estimated Amortization Expense [Abstract] |  |  |  |  |  |
Remaining 2018 |  | 15 |  | 15 |  |
2019 |  | 29 |  | 29 |  |
2020 |  | 0 |  | 0 |  |
2021 |  | 0 |  | 0 |  |
2022 |  | $ 0 |  | $ 0 |  |
[1] | Excludes fully amortized intangible assets.

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