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Equity Incentive Plan - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Expected future compensation expense | $ 1,078 |  | $ 1,078 |  |
Weighted average remaining life of grants related to unvested awards not yet recognized |  |  | 2 years 4 months 9 days |  |
Civista Director [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Restricted common shares granted |  |  | 7,224 |  |
Share based compensation - Civista BOD |  |  | $ 168 |  |
Restricted Stock [Member] | Minimum [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Restricted shares vesting service period |  |  | 3 years |  |
Restricted Stock [Member] | Maximum [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Restricted shares vesting service period |  |  | 5 years |  |
2014 Incentive Plan [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Maximum number of shares under stock option plan authorized for issuance |  |  |  |  | 375,000
Number of shares available for grant under stock option plan | 118,536 |  | 118,536 |  |
Options granted |  |  | 0 | 0 |
Share based compensation expense | $ 153 | $ 132 | $ 484 | $ 392 |
Expected future compensation expense | $ 1,078 |  | $ 1,078 |  |
Weighted average remaining life of grants related to unvested awards not yet recognized |  |  | 2 years 4 months 9 days |  |
2014 Incentive Plan [Member] | Civista Director [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Director retainer fees |  |  | $ 168 |  |

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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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