Label |
Element |
Value |
Fair Value, Measurements, Recurring [Member] |
|
|
Other Borrowed Money |
us-gaap_AdvancesFromFederalHomeLoanBanks |
$ 40,000
|
Other Borrowed Money |
us-gaap_AdvancesFromFederalHomeLoanBanks |
40,000
|
Subordinated Debentures |
us-gaap_SubordinatedDebt |
24,229
|
Subordinated Debentures |
us-gaap_SubordinatedDebt |
24,229
|
Federal Home Loan Bank Stock, at Cost |
us-gaap_FederalHomeLoanBankStock |
2,731
|
Federal Home Loan Bank Stock, at Cost |
us-gaap_FederalHomeLoanBankStock |
2,831
|
Held to Maturity, at Cost (Fair Value of $27 and $30, as of June 30, 2015 and December 31, 2014, Respectively) |
us-gaap_HeldToMaturitySecurities |
27
|
Held to Maturity, at Cost (Fair Value of $27 and $30, as of June 30, 2015 and December 31, 2014, Respectively) |
us-gaap_HeldToMaturitySecurities |
30
|
Loans, Net |
us-gaap_LoansReceivableNet |
736,930
|
Loans, Net |
us-gaap_LoansReceivableNet |
751,210
|
Deposits [Standard Label] |
us-gaap_Deposits |
968,634
|
Deposits [Standard Label] |
us-gaap_Deposits |
979,303
|
Cash and Short-Term Investments |
us-gaap_CashCashEquivalentsAndShortTermInvestments |
43,873
|
Cash and Short-Term Investments |
us-gaap_CashCashEquivalentsAndShortTermInvestments |
65,811
|
Bank-Owned Life Insurance |
us-gaap_BankOwnedLifeInsurance |
14,531
|
Bank-Owned Life Insurance |
us-gaap_BankOwnedLifeInsurance |
14,557
|
Available for Sale, at Fair Value |
us-gaap_AvailableForSaleSecurities |
273,878
|
Available for Sale, at Fair Value |
us-gaap_AvailableForSaleSecurities |
274,594
|
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] |
|
|
Deposits, Fair Value Disclosure |
us-gaap_DepositsFairValueDisclosure |
550,901
|
Deposits, Fair Value Disclosure |
us-gaap_DepositsFairValueDisclosure |
551,057
|
BankOwnedLifeInsuranceFairValue |
cban_BankOwnedLifeInsuranceFairValue |
14,531
|
BankOwnedLifeInsuranceFairValue |
cban_BankOwnedLifeInsuranceFairValue |
14,557
|
Loans Receivable, Fair Value Disclosure |
us-gaap_LoansReceivableFairValueDisclosure |
0
|
Loans Receivable, Fair Value Disclosure |
us-gaap_LoansReceivableFairValueDisclosure |
0
|
Subordinated Debt Obligations, Fair Value Disclosure |
us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations |
0
|
Subordinated Debt Obligations, Fair Value Disclosure |
us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations |
24,229
|
Federal Home Loan Bank Borrowings, Fair Value Disclosure |
us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure |
0
|
Federal Home Loan Bank Borrowings, Fair Value Disclosure |
us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure |
0
|
Cash and Short-Term Investments |
us-gaap_CashCashEquivalentsAndShortTermInvestments |
43,873
|
Cash and Short-Term Investments |
us-gaap_CashCashEquivalentsAndShortTermInvestments |
65,811
|
Federal Home Loan Bank Stock |
us-gaap_InvestmentInFederalHomeLoanBankStockFairValueDisclosure |
2,731
|
Federal Home Loan Bank Stock |
us-gaap_InvestmentInFederalHomeLoanBankStockFairValueDisclosure |
2,831
|
Held to Maturity, Fair Value (in Dollars) |
us-gaap_HeldToMaturitySecuritiesFairValue |
0
|
Held to Maturity, Fair Value (in Dollars) |
us-gaap_HeldToMaturitySecuritiesFairValue |
0
|
Available for Sale, at Fair Value |
us-gaap_AvailableForSaleSecurities |
0
|
Available for Sale, at Fair Value |
us-gaap_AvailableForSaleSecurities |
0
|
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] |
|
|
Deposits, Fair Value Disclosure |
us-gaap_DepositsFairValueDisclosure |
419,421
|
Deposits, Fair Value Disclosure |
us-gaap_DepositsFairValueDisclosure |
429,817
|
BankOwnedLifeInsuranceFairValue |
cban_BankOwnedLifeInsuranceFairValue |
0
|
BankOwnedLifeInsuranceFairValue |
cban_BankOwnedLifeInsuranceFairValue |
0
|
Loans Receivable, Fair Value Disclosure |
us-gaap_LoansReceivableFairValueDisclosure |
731,170
|
Loans Receivable, Fair Value Disclosure |
us-gaap_LoansReceivableFairValueDisclosure |
746,061
|
Subordinated Debt Obligations, Fair Value Disclosure |
us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations |
0
|
Subordinated Debt Obligations, Fair Value Disclosure |
us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations |
24,229
|
Federal Home Loan Bank Borrowings, Fair Value Disclosure |
us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure |
41,851
|
Federal Home Loan Bank Borrowings, Fair Value Disclosure |
us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure |
41,962
|
Cash and Short-Term Investments |
us-gaap_CashCashEquivalentsAndShortTermInvestments |
0
|
Cash and Short-Term Investments |
us-gaap_CashCashEquivalentsAndShortTermInvestments |
0
|
Federal Home Loan Bank Stock |
us-gaap_InvestmentInFederalHomeLoanBankStockFairValueDisclosure |
0
|
Federal Home Loan Bank Stock |
us-gaap_InvestmentInFederalHomeLoanBankStockFairValueDisclosure |
0
|
Held to Maturity, Fair Value (in Dollars) |
us-gaap_HeldToMaturitySecuritiesFairValue |
27
|
Held to Maturity, Fair Value (in Dollars) |
us-gaap_HeldToMaturitySecuritiesFairValue |
30
|
Available for Sale, at Fair Value |
us-gaap_AvailableForSaleSecurities |
272,936
|
Available for Sale, at Fair Value |
us-gaap_AvailableForSaleSecurities |
273,646
|
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] |
|
|
Deposits, Fair Value Disclosure |
us-gaap_DepositsFairValueDisclosure |
0
|
Deposits, Fair Value Disclosure |
us-gaap_DepositsFairValueDisclosure |
0
|
BankOwnedLifeInsuranceFairValue |
cban_BankOwnedLifeInsuranceFairValue |
0
|
BankOwnedLifeInsuranceFairValue |
cban_BankOwnedLifeInsuranceFairValue |
0
|
Loans Receivable, Fair Value Disclosure |
us-gaap_LoansReceivableFairValueDisclosure |
6,882
|
Loans Receivable, Fair Value Disclosure |
us-gaap_LoansReceivableFairValueDisclosure |
7,778
|
Subordinated Debt Obligations, Fair Value Disclosure |
us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations |
0
|
Subordinated Debt Obligations, Fair Value Disclosure |
us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations |
0
|
Federal Home Loan Bank Borrowings, Fair Value Disclosure |
us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure |
0
|
Federal Home Loan Bank Borrowings, Fair Value Disclosure |
us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure |
0
|
Cash and Short-Term Investments |
us-gaap_CashCashEquivalentsAndShortTermInvestments |
0
|
Cash and Short-Term Investments |
us-gaap_CashCashEquivalentsAndShortTermInvestments |
0
|
Federal Home Loan Bank Stock |
us-gaap_InvestmentInFederalHomeLoanBankStockFairValueDisclosure |
0
|
Federal Home Loan Bank Stock |
us-gaap_InvestmentInFederalHomeLoanBankStockFairValueDisclosure |
0
|
Held to Maturity, Fair Value (in Dollars) |
us-gaap_HeldToMaturitySecuritiesFairValue |
0
|
Held to Maturity, Fair Value (in Dollars) |
us-gaap_HeldToMaturitySecuritiesFairValue |
0
|
Available for Sale, at Fair Value |
us-gaap_AvailableForSaleSecurities |
942
|
Available for Sale, at Fair Value |
us-gaap_AvailableForSaleSecurities |
$ 948
|