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Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2017
Amortized intangible assets [Abstract] |  |  |  |
Gross carrying value | [1] | $ 3,545 |  | $ 3,516
Accumulated amortization | [1] | (1,689) |  | (1,563)
Net carrying value | [1] | 1,856 |  | 1,953
Unamortized intangible assets [Abstract] |  |  |  |
Goodwill |  | 23,296 |  | 23,296
Actual and Estimated Future Amortization Expense [Abstract] |  |  |  |
Amortization expense |  | 126 | $ 123 |
Estimated Amortization Expense [Abstract] |  |  |  |
Remaining 2018 |  | 354 |  |
2019 |  | 412 |  |
2020 |  | 317 |  |
2021 |  | 256 |  |
2022 |  | 200 |  |
MSRs [Member] |  |  |  |
Amortized intangible assets [Abstract] |  |  |  |
Gross carrying value | [1] | 1,634 |  | 1,605
Accumulated amortization | [1] | (961) |  | (912)
Net carrying value | [1] | 673 |  | 693
Actual and Estimated Future Amortization Expense [Abstract] |  |  |  |
Amortization expense |  | 49 | 47 |
Estimated Amortization Expense [Abstract] |  |  |  |
Remaining 2018 |  | 135 |  |
2019 |  | 153 |  |
2020 |  | 120 |  |
2021 |  | 91 |  |
2022 |  | 67 |  |
Core Deposit Intangibles [Member] |  |  |  |
Amortized intangible assets [Abstract] |  |  |  |
Gross carrying value | [1] | 1,786 |  | 1,786
Accumulated amortization | [1] | (655) |  | (586)
Net carrying value | [1] | 1,131 |  | 1,200
Actual and Estimated Future Amortization Expense [Abstract] |  |  |  |
Amortization expense |  | 69 | 68 |
Estimated Amortization Expense [Abstract] |  |  |  |
Remaining 2018 |  | 196 |  |
2019 |  | 230 |  |
2020 |  | 197 |  |
2021 |  | 165 |  |
2022 |  | 133 |  |
Covenant not to Compete [Member] |  |  |  |
Amortized intangible assets [Abstract] |  |  |  |
Gross carrying value | [1] | 125 |  | 125
Accumulated amortization | [1] | (73) |  | (65)
Net carrying value | [1] | 52 |  | $ 60
Actual and Estimated Future Amortization Expense [Abstract] |  |  |  |
Amortization expense |  | 8 | $ 8 |
Estimated Amortization Expense [Abstract] |  |  |  |
Remaining 2018 |  | 23 |  |
2019 |  | 29 |  |
2020 |  | 0 |  |
2021 |  | 0 |  |
2022 |  | $ 0 |  |
[1] | Excludes fully amortized intangible assets.

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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