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

Noncash or part noncash acquisition, consideration paid.

No definition available.

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