XML 85 R75.htm IDEA: XBRL DOCUMENT
v3.23.1

Commitments, Contingencies and Off-Balance-Sheet Risk - Additional Information (Detail) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2023 | Dec. 31, 2022
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Maximum period of commitments to make loans | 1 year |
Maximum time period of maturities | 30 years |
Reserve balance under Federal Reserve Board requirements | $ 0 | $ 0
Minimum [Member] |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Range of fixed interest rate loan commitments | 3.10% | 3.25%
Maximum [Member] |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Range of fixed interest rate loan commitments | 8.50% | 8.00%

X
- Definition Maximum credit commitments maturities period description. + References No definition available. + Details
Name: | civb_CreditCommitmentsMaturitiesPeriod
Namespace Prefix: | civb_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum period to commit loan description. + References No definition available. + Details
Name: | civb_MaximumPeriodToCommitLoan
Namespace Prefix: | civb_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Range of fixed interest rate loan commitments. + References No definition available. + Details
Name: | civb_RangeOfFixedInterestRateLoanCommitments
Namespace Prefix: | civb_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Reserve balance under federal reserve board requirements. + References No definition available. + Details
Name: | civb_ReserveBalanceUnderFederalReserveBoardRequirements
Namespace Prefix: | civb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FairValueOffBalanceSheetRisksDisclosureInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |