XML 143 R82.htm IDEA: XBRL DOCUMENT
v3.20.1

Allowance for Loan Losses - Schedule of TDR (Detail) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 USD ($) Contract | Dec. 31, 2018 USD ($) Contract | Dec. 31, 2017 USD ($) Contract
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Number of Contracts | Contract | 1 | 2 | 1
Pre- Modification Outstanding Recorded Investment | $ 382 | $ 133 | $ 13
Post-Modification Outstanding Recorded Investment | $ 382 | $ 133 | $ 13
Commercial Real Estate Non Owner Occupied [Member] |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Number of Contracts | Contract | 1 |  |
Pre- Modification Outstanding Recorded Investment | $ 382 |  |
Post-Modification Outstanding Recorded Investment | $ 382 |  |
Residential Real Estate [Member] |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Number of Contracts | Contract |  | 1 | 1
Pre- Modification Outstanding Recorded Investment |  | $ 23 | $ 13
Post-Modification Outstanding Recorded Investment |  | $ 23 | $ 13
Farm Real Estate [Member] |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Number of Contracts | Contract |  | 1 |
Pre- Modification Outstanding Recorded Investment |  | $ 110 |
Post-Modification Outstanding Recorded Investment |  | $ 110 |

X
- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsNumberOfContracts2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, after troubled debt restructuring, of modified financing receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount, before troubled debt restructuring, of financing receivable to be modified. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_FinancingReceivableRecordedInvestmentPastDueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=civb_CommercialRealEstateNonOwnerOccupiedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=civb_FarmRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |