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Intangible Assets and Goodwill (Tables) | 12 Months Ended
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Dec. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract] |
Summary of Intangible Assets | The following is a summary of intangible assets:
|  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Carrying Amount |
|  | (Dollars in thousands) |
As of December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |
Core deposit intangibles |  | $ | 17,447 |  |  | $ | (8,451 | ) |  | $ | 8,996 |
Customer relationship intangibles |  |  | 5,699 |  |  |  | (3,767 | ) |  |  | 1,932 |
Mortgage servicing intangibles |  |  | 439 |  |  |  | (285 | ) |  |  | 154 |
Total |  | $ | 23,585 |  |  | $ | (12,503 | ) |  | $ | 11,082 |
As of December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |
Core deposit intangibles |  | $ | 17,447 |  |  | $ | (6,611 | ) |  | $ | 10,836 |
Customer relationship intangibles |  |  | 5,699 |  |  |  | (3,419 | ) |  |  | 2,280 |
Mortgage servicing intangibles |  |  | 473 |  |  |  | (259 | ) |  |  | 214 |
Total |  | $ | 23,619 |  |  | $ | (10,289 | ) |  | $ | 13,330 |
Estimated Amortization of Intangible Assets | Estimated amortization of intangible assets for the next five years, as of December 31, 2017, is as follows (dollars in thousands):
Estimated Amortization |  |  |  |
2018 |  | $ | 2,208 |
2019 |  |  | 2,208 |
2020 |  |  | 2,096 |
2021 |  |  | 1,265 |
2022 |  |  | 950 |
Summary of Goodwill by Business Segment | The following is a summary of goodwill by business segment:
|  |  |  |  |  |  |  |  |  | Other |  |  | Executive, |  |  |  |  |
|  | Metropolitan |  |  | Community |  |  | Financial |  |  | Operations |  |  |  |  |
|  | Banks |  |  | Banks |  |  | Services |  |  | & Support |  |  | Consolidated |
|  | (Dollars in thousands) |
Year Ended December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning and end of period |  | $ | 8,078 |  |  | $ | 40,050 |  |  | $ | 5,464 |  |  | $ | 450 |  |  | $ | 54,042 |
Year Ended December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning and end of period |  | $ | 8,078 |  |  | $ | 40,050 |  |  | $ | 5,464 |  |  | $ | 450 |  |  | $ | 54,042 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance and exist in perpetuity, 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 (b) -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 3 -Subparagraph (b),(d) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275 + Details
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