Mortgage Banking Activities - Schedule of Amortization Expense (Details) $ in Thousands	Dec. 31, 2025 USD ($)
Transfers and Servicing [Abstract]
2026	$ 3,845
2027	3,443
2028	3,094
2029	2,765
Thereafter	$ 16,243

Mortgage Servicing Rights, Expected Amortization, After Year Four

No definition available.

Name:	cbci_MortgageServicingRightsExpectedAmortizationAfterYearFour
Namespace Prefix:	cbci_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant