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v2.4.1.9

Loans, Credit Quality Indicator (Details) (USD $) | Mar. 31, 2015 | Dec. 31, 2014 | Mar. 31, 2014
--- | --- | --- | ---
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | $ 753,634,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount | $ 746,094,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount | $ 738,194,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Loan balance for reviewing high risk loans minimum | 250,000 cban_LoanBalanceForReviewingHighRiskLoansMinimum |  |
Commercial [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 51,774,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember | 50,960,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember | 43,979,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember
Agricultural [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 19,188,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cban_AgriculturalMember | 16,689,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cban_AgriculturalMember | 12,654,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cban_AgriculturalMember
Commercial Construction [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 48,611,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialRealEstateConstructionFinancingReceivableMember | 51,259,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialRealEstateConstructionFinancingReceivableMember | 54,608,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialRealEstateConstructionFinancingReceivableMember
Residential Construction [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 10,030,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cban_ResidentialConstructionMember | 11,221,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cban_ResidentialConstructionMember | 9,779,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cban_ResidentialConstructionMember
Commercial [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 341,845,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember | 332,231,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember | 337,835,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember
Residential [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 202,878,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialPortfolioSegmentMember | 203,753,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialPortfolioSegmentMember | 202,159,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialPortfolioSegmentMember
Farmland [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 51,572,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cban_FarmlandMember | 49,951,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cban_FarmlandMember | 47,886,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cban_FarmlandMember
Consumer [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 21,705,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ConsumerPortfolioSegmentMember | 22,820,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ConsumerPortfolioSegmentMember | 23,693,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ConsumerPortfolioSegmentMember
Other [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 6,031,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_UnallocatedFinancingReceivablesMember | 7,210,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_UnallocatedFinancingReceivablesMember | 5,601,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_UnallocatedFinancingReceivablesMember
Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 700,061,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember | 686,072,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember |
Pass [Member] | Commercial [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 47,730,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember | 46,230,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember |
Pass [Member] | Agricultural [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 19,005,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cban_AgriculturalMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember | 16,504,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cban_AgriculturalMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember |
Pass [Member] | Commercial Construction [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 42,481,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialRealEstateConstructionFinancingReceivableMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember | 45,063,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialRealEstateConstructionFinancingReceivableMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember |
Pass [Member] | Residential Construction [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 10,030,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cban_ResidentialConstructionMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember | 11,221,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cban_ResidentialConstructionMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember |
Pass [Member] | Commercial [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 322,579,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember | 309,828,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember |
Pass [Member] | Residential [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 182,105,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember | 180,550,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember |
Pass [Member] | Farmland [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 49,247,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cban_FarmlandMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember | 47,548,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cban_FarmlandMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember |
Pass [Member] | Consumer [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 21,049,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ConsumerPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember | 22,115,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ConsumerPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember |
Pass [Member] | Other [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 5,835,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_UnallocatedFinancingReceivablesMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember | 7,013,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_UnallocatedFinancingReceivablesMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember |
Special Mention [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 25,029,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember | 27,139,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember |
Special Mention [Member] | Commercial [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 2,329,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember | 2,905,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember |
Special Mention [Member] | Agricultural [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 27,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cban_AgriculturalMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember | 27,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cban_AgriculturalMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember |
Special Mention [Member] | Commercial Construction [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 1,665,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialRealEstateConstructionFinancingReceivableMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember | 1,741,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialRealEstateConstructionFinancingReceivableMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember |
Special Mention [Member] | Residential Construction [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 0 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cban_ResidentialConstructionMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember | 0 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cban_ResidentialConstructionMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember |
Special Mention [Member] | Commercial [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 9,198,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember | 11,220,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember |
Special Mention [Member] | Residential [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 10,838,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember | 10,582,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember |
Special Mention [Member] | Farmland [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 767,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cban_FarmlandMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember | 415,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cban_FarmlandMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember |
Special Mention [Member] | Consumer [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 203,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ConsumerPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember | 249,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ConsumerPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember |
Special Mention [Member] | Other [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 2,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_UnallocatedFinancingReceivablesMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember | 0 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_UnallocatedFinancingReceivablesMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember |
Substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 28,544,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember | 32,883,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember |
Substandard [Member] | Commercial [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 1,715,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember | 1,825,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember |
Substandard [Member] | Agricultural [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 156,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cban_AgriculturalMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember | 158,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cban_AgriculturalMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember |
Substandard [Member] | Commercial Construction [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 4,465,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialRealEstateConstructionFinancingReceivableMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember | 4,455,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialRealEstateConstructionFinancingReceivableMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember |
Substandard [Member] | Residential Construction [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 0 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cban_ResidentialConstructionMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember | 0 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cban_ResidentialConstructionMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember |
Substandard [Member] | Commercial [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 10,068,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember | 11,183,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember |
Substandard [Member] | Residential [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 9,935,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember | 12,621,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember |
Substandard [Member] | Farmland [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 1,558,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cban_FarmlandMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember | 1,988,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = cban_FarmlandMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember |
Substandard [Member] | Consumer [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | 453,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ConsumerPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember | 456,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ConsumerPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember |
Substandard [Member] | Other [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Total Loans | $ 194,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_UnallocatedFinancingReceivablesMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember | $ 197,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_UnallocatedFinancingReceivablesMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember |

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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522 + Details
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