XML 102 R87.htm IDEA: XBRL DOCUMENT
v3.22.4

COMMITMENTS AND CONTINGENCIES - Narrative (Details) | 12 Months Ended
--- | ---
Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract] |
Expiration period of letter of credit issued | 1 year

X
- Definition Refers to the expiration dates of letter of credit issued measured in years. + References No definition available. + Details
Name: | cban_ExpirationPeriodOfLetterOfCreditIssued
Namespace Prefix: | cban_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration