XML 127 R111.htm IDEA: XBRL DOCUMENT
v3.23.1

Income Taxes - Effective Tax Rates Differed from Statutory Federal Income Tax Rate (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Income Tax Disclosure [Abstract] |  |  |
Income taxes computed at the statutory federal tax rate | $ 9,878 | $ 9,988 | $ 7,798
Add (subtract) tax effect of: |  |  |
Nontaxable interest income, net of nondeductible interest expense | (1,666) | (1,315) | (1,293)
Low income housing tax credit | (679) | (1,402) | (1,186)
Cash surrender value of BOLI | (207) | (252) | (205)
Other | 282 | (2) | (174)
Income tax expense | $ 7,608 | $ 7,017 | $ 4,940

X
- Definition Income Tax Effect Of Additions subtractions [Abstract] + References No definition available. + Details
Name: | civb_IncomeTaxEffectOfAdditionsSubtractionsAbstract
Namespace Prefix: | civb_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Income tax expense (benefit) net. + References No definition available. + Details
Name: | civb_IncomeTaxExpenseBenefitNet
Namespace Prefix: | civb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Income Tax Reconciliation Bank Owned Life Insurance Income + References No definition available. + Details
Name: | civb_IncomeTaxReconciliationBankOwnedLifeInsuranceIncome
Namespace Prefix: | civb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Income Tax Reconciliation Low Income Housing Tax Credit + References No definition available. + Details
Name: | civb_IncomeTaxReconciliationLowIncomeHousingTaxCredit
Namespace Prefix: | civb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Income Tax Reconciliation Nontaxable Interest Income Net Of Nondeductible Interest Expense + References No definition available. + Details
Name: | civb_IncomeTaxReconciliationNontaxableInterestIncomeNetOfNondeductibleInterestExpense
Namespace Prefix: | civb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_IncomeTaxDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319 + Details
Name: | us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319 + Details
Name: | us-gaap_IncomeTaxReconciliationOtherAdjustments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration