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Equity Incentive Plan - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Restricted shares vesting service period | 3 years |  |  |
Share based compensation - Civista BOD | $ 819 | $ 702 | $ 617 |
Expected future compensation expense | $ 905 |  |  |
Weighted average remaining life of grants related to unvested awards not yet recognized | 2 years 1 month 2 days |  |  |
Civista Director [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Restricted common shares granted | 8,098 | 8,792 | 14,266 |
Share based compensation - Civista BOD | $ 189 | $ 196 | $ 196 |
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 | 117,662 |  |  |
Options granted | 0 | 0 |  |
Share based compensation expense | $ 630 | $ 506 | 421 |
Expected future compensation expense | $ 905 |  |  |
Weighted average remaining life of grants related to unvested awards not yet recognized | 2 years 1 month 2 days |  |  |
2014 Incentive Plan [Member] | Civista Director [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Director retainer fees | $ 189 | $ 196 | $ 196 |

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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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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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