XML 69 R59.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Note 9 - Subordinated Debentures (Trusted Preferred Securities) - Schedule of Subordinated Debentures (Details) - Trust Preferred Securities Subject to Mandatory Redemption [Member] $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2017 USD ($)
Colony Bankcorp Statutory Trust III [Member] |
Issuance date | Jun. 17, 2004
Debt amount | $ 4,640
Total interest rate | 4.00111%
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 | 1.32111%
Added points | 2.68%
Colony Bankcorp Capital Trust I [Member] |
Issuance date | Apr. 13, 2006
Debt amount | $ 5,155
Total interest rate | 2.835%
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 | 1.335%
Added points | 1.50%
Colony Bankcorp Capital Trust II [Member] |
Issuance date | Mar. 12, 2007
Debt amount | $ 9,279
Total interest rate | 2.985%
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 | 1.335%
Added points | 1.65%
Colony Bankcorp Capital Trust III [Member] |
Issuance date | Sep. 14, 2007
Debt amount | $ 5,155
Total interest rate | 2.71111%
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 | 1.31111%
Added points | 1.40%

X
- Definition Minimum redemption date. + References No definition available. + Details
Name: | cban_RedemptionDateMinimum
Namespace Prefix: | cban_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition The rate which is used as a benchmark to determine the variable rates. + References No definition available. + Details
Name: | cban_ReferenceRate
Namespace Prefix: | cban_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Date the debt instrument was issued, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentIssuanceDate1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentMaturityDate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a rate subject to change from time to time. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LongTermDebtPercentageBearingVariableInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_ScheduleOfSharesSubjectToMandatoryRedemptionBySettlementTermsAxis=us-gaap_TrustPreferredSecuritiesSubjectToMandatoryRedemptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=cban_ColonyBankcorpStatutoryTrustIIIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=cban_ColonyBankcorpCapitalTrustIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=cban_ColonyBankcorpCapitalTrustIIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=cban_ColonyBankcorpCapitalTrustIIIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |