XML 55 R43.htm IDEA: XBRL DOCUMENT
v3.20.1

Consolidated Financial Statements - Additional Information (Detail) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 USD ($) Dwelling Segment
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items] |
Number of loan concentration by bank to lessors and owners of Residential Buildings and Dwellings | Dwelling | 2
Number of reportable segment | Segment | 1
Non Residential Buildings and Dwellings [Member] |
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items] |
Amount payable to lessors | $ 469,112
Amount payable to lessors in percentage | 26.80%
Residential Buildings and Dwellings [Member] |
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items] |
Amount payable to lessors | $ 185,448
Amount payable to lessors in percentage | 10.60%
Maximum [Member] |
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items] |
Percentage of insurance commission revenue of total revenue | 1.00%
Maximum [Member] | WSP [Member] |
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items] |
Percentage of insurance commission revenue of total revenue | 1.00%

X
- Definition Amount payable to lessors in respect of default on rental obligation. + References No definition available. + Details
Name: | civb_AmountPayableToLessorsInRespectOfDefaultOnRentalObligation
Namespace Prefix: | civb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Nature Of Operations And Summary Of Significant Accounting Policies [Line Items] + References No definition available. + Details
Name: | civb_NatureOfOperationsAndSummaryOfSignificantAccountingPoliciesLineItems
Namespace Prefix: | civb_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of concentration by bank to lessors and owners of residential buildings and dwellings. + References No definition available. + Details
Name: | civb_NumberOfConcentrationByBankToLessorsAndOwnersOfResidentialBuildingsAndDwellings
Namespace Prefix: | civb_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of amount payable to lessors. + References No definition available. + Details
Name: | civb_PercentageOfAmountPayableToLessors
Namespace Prefix: | civb_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of insurance commission revenue of total revenue. + References No definition available. + Details
Name: | civb_PercentageOfInsuranceCommissionRevenueOfRevenue
Namespace Prefix: | civb_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=civb_NonResidentialBuildingsAndDwellingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=civb_ResidentialBuildingsAndDwellingsMember
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: |

X
- Details
Name: | dei_LegalEntityAxis=civb_WaterStMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |