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Condensed Consolidated Statements of Cash Flows (Unaudited) (Parenthetical) $ in Thousands	Jul. 01, 2022 USD ($)
Statement Of Cash Flows [Abstract]
Noncash or Part Noncash Acquisition, Consideration Paid	$ 46,090

X

- Definition

Noncash or part noncash acquisition, consideration paid.

+ References

No definition available.

+ Details

Name:	civb_NoncashOrPartNoncashAcquisitionConsiderationPaid
Namespace Prefix:	civb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_StatementOfCashFlowsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration