XML 34 R20.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Note 13 - Preferred Stock | 12 Months Ended
--- | ---
Dec. 31, 2017
Notes to Financial Statements |
Preferred Stock And Warrants [Text Block] | ( 13 ) Preferred Stock At December 31, 2016, 9,360 shares of Fixed Rate Cumulative Perpetual Preferred Stock, Series A (the Preferred Stock) was outstanding with private investors. On March 31, 2017 the Company redeemed these 9,360 shares of Preferred Stock at the stated rate of $1,000 per share. Previously, the Company redeemed 8,661 shares in 2016 and 9,979 shares in 2015, all at the stated rate of $1,000 per share. As a result, there is no outstanding Preferred Stock as of December 31, 2017. While outstanding, the Preferred Stock qualified as Tier I Capital and was nonvoting, other th an class voting rights on certain matters that could adversely affect the Preferred Stock. The Preferred Stock paid cumulative cash dividends on a quarterly basis at a rate of 9 percent per annum for the years 2017, 2016 and 2015. The Company issued a warrant (the Warrant) to private investors for the purchase of up to 500,000 shares of the Company ’s outstanding common stock. The Warrant originated in 2009 through transactions with the United States Department of the Treasury in conjunction with the issuance of the Preferred Stock. The Warrant may be exercised on or before January 9, 2019 at an exercise price of $8.40 per share. No voting rights may be exercised with respect to the shares of the Warrant until the Warrant has been exercised.

X
- Definition The entire disclosure for terms, amounts, nature of changes, rights and privileges, dividends, and other matters related to preferred stock and warrants. + References No definition available. + Details
Name: | cban_PreferredStockAndWarrantsTextBlock
Namespace Prefix: | cban_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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