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Goodwill and Other Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |
Summary of identifiable intangible assets | Identifiable intangible assets were as follows as of December 31:
| 2020
| Gross Intangible Assets |  | Accumulated Amortization |  | Net Intangible Assets
Core deposit premium resulting from acquisitions | $ | 5,579 |  |  | $ | 5,530 |  |  | $ | 49 |
| 2019
| Gross Intangible Assets |  | Accumulated Amortization |  | Net Intangible Assets
Core deposit premium resulting from acquisitions | $ | 5,579 |  |  | $ | 5,482 |  |  | $ | 97 |
Summary of estimated amortization expense associated with identifiable intangibles | Estimated amortization expense associated with identifiable intangibles for each of the next five years succeeding December 31, 2020, and thereafter is as follows:
| Estimated Amortization Expense
2021 | $ | 29 |
2022 | 15 |
2023 | 2 |
2024 | 2 |
2025 | 1 |
Total | $ | 49 |

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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://fasb.org/us-gaap/role/ref/legacyRef -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://fasb.org/us-gaap/role/ref/legacyRef -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://fasb.org/us-gaap/role/ref/legacyRef -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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