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Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
Finite-lived Intangible Assets Amortization Expense | The following table presents information about our core deposit premium intangible asset at December 31 (in thousands):
|  | 2017 |  | 2016
|  | Gross Carrying Amount |  | Accumulated Amortization |  | Gross Carrying Amount |  | Accumulated Amortization
Amortized intangible asset: |  |  |  |  |  |  |  |  |  |  |  |
Core deposit intangible |  | $ | 8,589 |  |  | $ | 626 |  |  | $ | 2,750 |  |  | $ | 280 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense | The following table presents information about aggregate amortization expense for 2017 and 2016 and for the succeeding fiscal years as follows (in thousands):
|  | 2017 |  | 2016
Aggregate amortization expense of core deposit premium intangible |  | $ | 346 |  |  | $ | 305 |
Schedule of Intangible Assets and Goodwill | Estimated aggregate amortization expense of the core deposit premium intangible for the year ending December 31 (in thousands):
2018 | $ | 772 |
2019 | 772 |
2020 | 717 |
2021 | 670 |
2022 | 670 |
Thereafter | 4,362 |
Total | $ | 7,963 |

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- Definition Tabular disclosure of goodwill and intangible assets, which may be broken down by segment or major class. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + 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) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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