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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] |
Summary of Change in Carrying Amount of Goodwill | The change in the carrying amount of goodwill for the years ended December 31, 2017 and 2016 is as follows:
|  | 2017 |  |  | 2016 |
Balance, beginning of year |  | $ | 38,730 |  |  | $ | 27,194 |
Acquired during the year |  |  | 0 |  |  |  | 11,536 |
Balance, end of year |  | $ | 38,730 |  |  | $ | 38,730 |
Estimated Amortization Expense of Core Deposit Intangible Assets | Estimated amortization expense of core deposit intangible assets for each of the next five years is as follows:
2018 |  | $ | 898 |
2019 |  |  | 567 |
2020 |  |  | 160 |
2021 |  |  | 0 |
2022 |  |  | 0 |

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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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