XML 79 R68.htm IDEA: XBRL DOCUMENT
v3.4.0.3

Commitments, Contingencies and Off-Balance Sheet Risk - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2016 | Dec. 31, 2015
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 |
Average reserve balance under Federal Reserve Board requirements | $ 31,889 | $ 2,448
Minimum [Member] |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Range of fixed interest rate loan commitments | 3.25% | 3.25%
Maximum [Member] |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Range of fixed interest rate loan commitments | 8.75% | 8.75%

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

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: | num:percentItemType
Balance Type: | na
Period Type: | instant

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: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |