XML 40 R29.htm IDEA: XBRL DOCUMENT
v3.20.2

Commitments and Contingencies (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2020
Commitments and Contingencies Disclosure [Abstract] |
Summary Of Financial Instrument Outstanding | At September 30, 2020 and December 31, 2019 the following financial instruments were outstanding whose contract amounts represent credit risk:
| Contract Amount
(dollars in thousands) | September 30, 2020 |  | December 31, 2019
Loan commitments | $ | 147,410 |  |  | $ | 102,890 |
Letters of credit | 3,540 |  |  | 1,576 |

X
- Definition Tabular disclosure of off-balance sheet commitments, including commitments to fund loans and unused lines of credit, as well as letters of credit outstanding. + References No definition available. + Details
Name: | cban_SummaryOfFinancialInstrumentOutstandingTableTextBlock
Namespace Prefix: | cban_
Data Type: | nonnum:textBlockItemType
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