XML 96 R84.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Merger - Additional Information (Detail) - UCB and United Community Bank [Member] $ / shares in Units, $ in Millions |  | 6 Months Ended |
--- | --- | --- | ---
Mar. 11, 2018 Bank $ / shares shares | Jun. 30, 2018 | Dec. 31, 2017 USD ($)
Business Combinations [Line Items] |  |  |
Date of acquisition agreement |  | Mar. 11, 2018 |
Number of banking offices acquired | Bank | 8 |  |
Total consolidated assets | $ |  |  | $ 546
Total loans | $ |  |  | 296
Total deposits | $ |  |  | $ 462
Per share common stock | $ 1.027 |  |
Per share cash consideration | $ 2.54 |  |
Stock options outstanding | shares | 212,563 |  |
Share price per share | $ 26.22 |  |
Aggregate cash consideration to be paid | $ 13,600,000 |  |

X
- Definition Base Price Before Exercise Price For Cash Out Of Stock Option During Business Acquisition Share Price. + References No definition available. + Details
Name: | civb_BasePriceBeforeExercisePriceForCashOutOfStockOptionDuringBusinessAcquisitionSharePrice
Namespace Prefix: | civb_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Business Combination Number of Stock Options Cash Out. + References No definition available. + Details
Name: | civb_BusinessCombinationNumberOfStockOptionsCashOut
Namespace Prefix: | civb_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Business combination per share consideration cash. + References No definition available. + Details
Name: | civb_BusinessCombinationPerShareConsiderationCash
Namespace Prefix: | civb_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Business combination per share consideration share. + References No definition available. + Details
Name: | civb_BusinessCombinationPerShareConsiderationShare
Namespace Prefix: | civb_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Deposit Liabilities + References No definition available. + Details
Name: | civb_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDepositLiabilities
Namespace Prefix: | civb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Business combination recognized identifiable assets acquired and liabilities assumed loans receivable. + References No definition available. + Details
Name: | civb_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLoansReceivable
Namespace Prefix: | civb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Business Combinations [Line Items] + References No definition available. + Details
Name: | civb_BusinessCombinationsLineItems
Namespace Prefix: | civb_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of banking offices acquired. + References No definition available. + Details
Name: | civb_NumberOfBankingOfficesAcquired
Namespace Prefix: | civb_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Date when the business acquisition agreement was executed, in CCYY-MM-DD format. + References No definition available. + Details
Name: | us-gaap_BusinessAcquisitionDateOfAcquisitionAgreement1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination. + References No definition available. + Details
Name: | us-gaap_BusinessAcquisitionSharePrice
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of assets acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=civb_UnitedCommunityBancorpAndUnitedCommunityBankMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |