XML 111 R97.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Note 19 - Fair Value of Financial Instruments and Fair Value Measurements (Details Textual) | Dec. 31, 2017
--- | ---
Discounted Rate To Account For Selling And Marketing Costs | 10.00%

X
- Definition Refers to the discounted rate to account for selling and marketing costs in fair value measurements. + References No definition available. + Details
Name: | cban_DiscountedRateToAccountForSellingAndMarketingCosts
Namespace Prefix: | cban_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant