XML 24 R76.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Derivative Hedging Instruments - Summary of Interest Rate Swap Transactions (Detail) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2015 | Dec. 31, 2014
Derivative Financial Instruments, Assets [Member] |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Net Exposure, Notional Amount | $ 28,958,000 invest_DerivativeNotionalAmount / us-gaap_FairValueByAssetClassAxis = us-gaap_DerivativeFinancialInstrumentsAssetsMember | $ 29,060,000 invest_DerivativeNotionalAmount / us-gaap_FairValueByAssetClassAxis = us-gaap_DerivativeFinancialInstrumentsAssetsMember
Weighted Average Rate Received(Paid) | 5.47%us-gaap_DerivativeAverageSwaptionInterestRate / us-gaap_FairValueByAssetClassAxis = us-gaap_DerivativeFinancialInstrumentsAssetsMember | 5.47%us-gaap_DerivativeAverageSwaptionInterestRate / us-gaap_FairValueByAssetClassAxis = us-gaap_DerivativeFinancialInstrumentsAssetsMember
Net Exposure, Impact of a 1 basis point change in interest rates | 19,000 civb_DerivativeEffectOfOneBasisPointChangeInInterestRate / us-gaap_FairValueByAssetClassAxis = us-gaap_DerivativeFinancialInstrumentsAssetsMember | 19,000 civb_DerivativeEffectOfOneBasisPointChangeInInterestRate / us-gaap_FairValueByAssetClassAxis = us-gaap_DerivativeFinancialInstrumentsAssetsMember
Repricing Frequency | Monthly | Monthly
Derivative Financial Instruments, Liabilities [Member] |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Net Exposure, Notional Amount | (28,958,000)invest_DerivativeNotionalAmount / us-gaap_FairValueByLiabilityClassAxis = us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember | (29,060,000)invest_DerivativeNotionalAmount / us-gaap_FairValueByLiabilityClassAxis = us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
Weighted Average Rate Received(Paid) | 5.47%us-gaap_DerivativeAverageSwaptionInterestRate / us-gaap_FairValueByLiabilityClassAxis = us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember | 5.47%us-gaap_DerivativeAverageSwaptionInterestRate / us-gaap_FairValueByLiabilityClassAxis = us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
Net Exposure, Impact of a 1 basis point change in interest rates | $ (19,000)civb_DerivativeEffectOfOneBasisPointChangeInInterestRate / us-gaap_FairValueByLiabilityClassAxis = us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember | $ (19,000)civb_DerivativeEffectOfOneBasisPointChangeInInterestRate / us-gaap_FairValueByLiabilityClassAxis = us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
Repricing Frequency | Monthly | Monthly

X
- Definition Derivative effect of one basis point change in interest rate. + References No definition available. + Details
Name: | civb_DerivativeEffectOfOneBasisPointChangeInInterestRate
Namespace Prefix: | civb_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Derivative repricing frequency. + References No definition available. + Details
Name: | civb_DerivativeRepricingFrequency
Namespace Prefix: | civb_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
Name: | invest_DerivativeNotionalAmount
Namespace Prefix: | invest_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Average fixed interest rate that will be received or paid upon exercise of a group of interest rate swaption contracts. + References No definition available. + Details
Name: | us-gaap_DerivativeAverageSwaptionInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_DerivativeFinancialInstrumentsAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByLiabilityClassAxis=us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |