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Note 12 - Subordinated Debentures (Trusted Preferred Securities) - Schedule of Subordinated Debentures (Details) - Trust Preferred Securities Subject to Mandatory Redemption [Member] | 12 Months Ended
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Dec. 31, 2017 USD ($)
Colony Bankcorp Statutory Trust III [Member] |
Issuance date | Jun. 17, 2004
Debt amount | $ 4,640
Total interest rate | 4.28042%
Maturity date | Jun. 14, 2034
5 year call option | Jun. 17, 2009
Colony Bankcorp Statutory Trust III [Member] | London Interbank Offered Rate (LIBOR) [Member] |
3 month LIBOR rate | 1.60042%
Added points | 2.68%
Colony Bankcorp Capital Trust I [Member] |
Issuance date | Apr. 13, 2006
Debt amount | $ 5,155
Total interest rate | 3.19465%
Maturity date | Apr. 13, 2036
5 year call option | Apr. 13, 2011
Colony Bankcorp Capital Trust I [Member] | London Interbank Offered Rate (LIBOR) [Member] |
3 month LIBOR rate | 1.69465%
Added points | 1.50%
Colony Bankcorp Capital Trust II [Member] |
Issuance date | Mar. 12, 2007
Debt amount | $ 9,279
Total interest rate | 3.34465%
Maturity date | Mar. 12, 2037
5 year call option | Mar. 12, 2012
Colony Bankcorp Capital Trust II [Member] | London Interbank Offered Rate (LIBOR) [Member] |
3 month LIBOR rate | 1.69465%
Added points | 1.65%
Colony Bankcorp Capital Trust III [Member] |
Issuance date | Sep. 14, 2007
Debt amount | $ 5,155
Total interest rate | 2.77796%
Maturity date | Sep. 14, 2037
5 year call option | Sep. 14, 2012
Colony Bankcorp Capital Trust III [Member] | London Interbank Offered Rate (LIBOR) [Member] |
3 month LIBOR rate | 1.37796%
Added points | 1.40%

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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399 + Details
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