XML 57 R47.htm IDEA: XBRL DOCUMENT
v3.21.2

Loans - Impaired Loan Data (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2021 | Dec. 31, 2020
Unpaid Contractual Principal Balance |  |
With No Related Allowance Recorded | $ 8,670 | $ 20,129
With An Allowance Recorded | 5,584 | 7,876
Loans Including Purchased Credit Impaired Loans | 15,363 | 28,384
Recorded Investment |  |
With No Related Allowance Recorded | 7,795 | 19,249
With An Allowance Recorded | 5,584 | 7,865
Loans Including Purchased Credit Impaired Loans | 14,381 | 27,361
Related Allowance |  |
With An Allowance Recorded | 993 | 1,925
Total Impaired Loans | 1,127 | 2,010
Average Recorded Investment |  |
With No Related Allowance Recorded | 15,079 | 17,376
With An Allowance Recorded | 6,609 | 7,766
Loans Including Purchased Credit Impaired Loans | 22,400 | 25,476
Purchase credit impaired |  |
Unpaid Contractual Principal Balance |  |
Loans Including Purchased Credit Impaired Loans | 1,109 | 379
Recorded Investment |  |
Loans Including Purchased Credit Impaired Loans | 1,002 | 247
Related Allowance |  |
With An Allowance Recorded | 134 | 85
Purchased Credit Impaired Loans | 134 | 85
Average Recorded Investment |  |
Loans Including Purchased Credit Impaired Loans | 712 | 334
Residential real estate |  |
Unpaid Contractual Principal Balance |  |
With No Related Allowance Recorded | 1,194 | 1,140
With An Allowance Recorded | 778 | 1,274
Loans Including Purchased Credit Impaired Loans | 1,983 | 2,428
Recorded Investment |  |
With No Related Allowance Recorded | 1,194 | 1,122
With An Allowance Recorded | 778 | 1,230
Loans Including Purchased Credit Impaired Loans | 1,980 | 2,363
Related Allowance |  |
With An Allowance Recorded | 113 | 226
Total Impaired Loans | 121 | 230
Average Recorded Investment |  |
With No Related Allowance Recorded | 1,105 | 2,142
With An Allowance Recorded | 1,093 | 703
Loans Including Purchased Credit Impaired Loans | 2,206 | 2,858
Residential real estate | Purchase credit impaired |  |
Unpaid Contractual Principal Balance |  |
Loans Including Purchased Credit Impaired Loans | 11 | 14
Recorded Investment |  |
Loans Including Purchased Credit Impaired Loans | 8 | 11
Related Allowance |  |
With An Allowance Recorded | 8 | 4
Purchased Credit Impaired Loans | 8 | 4
Average Recorded Investment |  |
Loans Including Purchased Credit Impaired Loans | 8 | 13
Commercial, financial & agricultural |  |
Unpaid Contractual Principal Balance |  |
With No Related Allowance Recorded | 80 | 42
With An Allowance Recorded | 0 | 310
Loans Including Purchased Credit Impaired Loans | 135 | 407
Recorded Investment |  |
With No Related Allowance Recorded | 80 | 40
With An Allowance Recorded | 0 | 310
Loans Including Purchased Credit Impaired Loans | 127 | 396
Related Allowance |  |
With An Allowance Recorded | 0 | 263
Total Impaired Loans | 4 | 263
Average Recorded Investment |  |
With No Related Allowance Recorded | 52 | 203
With An Allowance Recorded | 99 | 1,118
Loans Including Purchased Credit Impaired Loans | 195 | 1,370
Commercial, financial & agricultural | Purchase credit impaired |  |
Unpaid Contractual Principal Balance |  |
Loans Including Purchased Credit Impaired Loans | 55 | 55
Recorded Investment |  |
Loans Including Purchased Credit Impaired Loans | 47 | 46
Related Allowance |  |
With An Allowance Recorded | 4 | 0
Purchased Credit Impaired Loans | 4 | 0
Average Recorded Investment |  |
Loans Including Purchased Credit Impaired Loans | 44 | 49
Consumer and other |  |
Unpaid Contractual Principal Balance |  |
With No Related Allowance Recorded | 0 | 0
With An Allowance Recorded | 0 | 0
Loans Including Purchased Credit Impaired Loans | 192 | 192
Recorded Investment |  |
With No Related Allowance Recorded | 0 | 0
With An Allowance Recorded | 0 | 0
Loans Including Purchased Credit Impaired Loans | 96 | 96
Related Allowance |  |
With An Allowance Recorded | 0 | 0
Total Impaired Loans | 96 | 81
Average Recorded Investment |  |
With No Related Allowance Recorded | 0 | 0
With An Allowance Recorded | 2 | 0
Loans Including Purchased Credit Impaired Loans | 74 | 113
Consumer and other | Purchase credit impaired |  |
Unpaid Contractual Principal Balance |  |
Loans Including Purchased Credit Impaired Loans | 192 | 192
Recorded Investment |  |
Loans Including Purchased Credit Impaired Loans | 96 | 96
Related Allowance |  |
With An Allowance Recorded | 96 | 81
Purchased Credit Impaired Loans | 96 | 81
Average Recorded Investment |  |
Loans Including Purchased Credit Impaired Loans | 72 | 113
Construction, land and land development |  |
Unpaid Contractual Principal Balance |  |
With No Related Allowance Recorded | 62 | 6,969
With An Allowance Recorded | 0 | 0
Loans Including Purchased Credit Impaired Loans | 62 | 7,087
Recorded Investment |  |
With No Related Allowance Recorded | 61 | 6,982
With An Allowance Recorded | 0 | 0
Loans Including Purchased Credit Impaired Loans | 61 | 7,076
Related Allowance |  |
With An Allowance Recorded | 0 | 0
Total Impaired Loans | 0 | 0
Average Recorded Investment |  |
With No Related Allowance Recorded | 5,373 | 2,841
With An Allowance Recorded | 0 | 0
Loans Including Purchased Credit Impaired Loans | 5,437 | 2,937
Construction, land and land development | Purchase credit impaired |  |
Unpaid Contractual Principal Balance |  |
Loans Including Purchased Credit Impaired Loans | 0 | 118
Recorded Investment |  |
Loans Including Purchased Credit Impaired Loans | 0 | 94
Related Allowance |  |
With An Allowance Recorded | 0 | 0
Purchased Credit Impaired Loans | 0 | 0
Average Recorded Investment |  |
Loans Including Purchased Credit Impaired Loans | 64 | 96
Commercial real estate |  |
Unpaid Contractual Principal Balance |  |
With No Related Allowance Recorded | 7,334 | 11,978
With An Allowance Recorded | 4,806 | 6,292
Loans Including Purchased Credit Impaired Loans | 12,991 | 18,270
Recorded Investment |  |
With No Related Allowance Recorded | 6,460 | 11,105
With An Allowance Recorded | 4,806 | 6,325
Loans Including Purchased Credit Impaired Loans | 12,117 | 17,430
Related Allowance |  |
With An Allowance Recorded | 880 | 1,436
Total Impaired Loans | 906 | 1,436
Average Recorded Investment |  |
With No Related Allowance Recorded | 8,549 | 12,190
With An Allowance Recorded | 5,415 | 5,945
Loans Including Purchased Credit Impaired Loans | 14,488 | 18,198
Commercial real estate | Purchase credit impaired |  |
Unpaid Contractual Principal Balance |  |
Loans Including Purchased Credit Impaired Loans | 851 | 0
Recorded Investment |  |
Loans Including Purchased Credit Impaired Loans | 851 | 0
Related Allowance |  |
With An Allowance Recorded | 26 | 0
Purchased Credit Impaired Loans | 26 | 0
Average Recorded Investment |  |
Loans Including Purchased Credit Impaired Loans | $ 524 | $ 63

X
- Definition Impaired Financing Receivable, Purchased Credit Impaired Loans, Related Allowance + References No definition available. + Details
Name: | cban_ImpairedFinancingReceivablePurchasedCreditImpairedLoansRelatedAllowance
Namespace Prefix: | cban_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Impaired Financing Receivable, Related Allowance + References No definition available. + Details
Name: | cban_ImpairedFinancingReceivableRelatedAllowanceAbstract
Namespace Prefix: | cban_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Impaired Financing Receivable, Related Allowance Including Purchased Credit Impaired Loans + References No definition available. + Details
Name: | cban_ImpairedFinancingReceivableRelatedAllowanceIncludingPurchasedCreditImpairedLoans
Namespace Prefix: | cban_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5258-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- Definition Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953550-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition Amount of allowance for credit losses related to recorded investment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableRelatedAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of unpaid principal balance of impaired financing receivables with related allowance for credit losses and without related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition Amount of average investment of impaired financing receivables for which there is no related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5258-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of investment in impaired financing receivables for which there is no related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953550-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of average investment of impaired financing receivables for which there is a related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5258-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of investment in impaired financing receivables for which there is a related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953550-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Unpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_CreditLossStatusAxis=us-gaap_FinancialAssetAcquiredWithCreditDeteriorationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=cban_CommercialFinancialAndAgriculturalPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=cban_ConsumerAndOtherPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cban_ConstructionLandAndLandDevelopmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cban_OtherCommercialLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |