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Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
Summary of Goodwill and Other Intangible Assets | Company's intangible assets were as follows for the periods indicated:
|  |  | December 31, 2017 |  | December 31, 2016
| Amortization Period |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
|  |  | (In thousands)
Core deposit intangible | 10 years |  | $ | 2,213 |  |  | $ | (1,119 | ) |  | $ | 1,094 |  |  | $ | 2,213 |  |  | $ | (838 | ) |  | $ | 1,375 |
Third-party originators intangible | 7 years |  | $ | 483 |  |  | $ | (64 | ) |  | $ | 419 |  |  | $ | 483 |  |  | $ | — |  |  | $ | 483 |
Goodwill | N/A |  | $ | 11,031 |  |  | $ | — |  |  | $ | 11,031 |  |  | $ | 11,031 |  |  | $ | — |  |  | $ | 11,031 |
Total intangible assets |  |  | $ | 13,727 |  |  | $ | (1,183 | ) |  | $ | 12,544 |  |  | $ | 13,727 |  |  | $ | (838 | ) |  | $ | 12,889 |
Estimated Future Amortization Expense Related to Other Intangible Assets | Intangibles amortization expense for the years ended December 31, 2017, 2016 and 2015 was $345,000, $326,000 and $379,000, respectively, and estimated future amortization expense related to CDI and the third-party originators intangible for each of the next five years is as follows:
Year Ending December 31, | Amount
| (In thousands)
2018 | $ | 362 |
2019 | 309 |
2020 | 261 |
2021 | 216 |
2022 | 171 |
Thereafter | 194 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + 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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