XML 112 R99.htm IDEA: XBRL DOCUMENT v3.3.1.900

Note 19 - Fair Value of Financial Instruments and Fair Value Measurements (Details) - Quantitative Information for Financial Instruments Measured at Fair Value - Fair Value, Inputs, Level 3 [Member] - Fair Value, Measurements, Nonrecurring [Member] - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Commercial and Agricultural Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Commercial [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value (in Dollars)	$ 28,390
Commercial and Agricultural Portfolio Segment [Member] | Income Approach Valuation Technique [Member] | Commercial [Member]
Impaired Loans
Fair Value Inputs, Cap Rate	11.00%
Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Commercial [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value (in Dollars)	$ 7,347,541	$ 5,678,297
Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Commercial Construction [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value (in Dollars)	51,300	82,422
Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Residential [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value (in Dollars)	767,179	1,650,474
Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Farmland [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value (in Dollars)	$ 350,583	$ 367,086
Real Estate Portfolio Segment [Member] | Income Approach Valuation Technique [Member] | Commercial [Member]
Impaired Loans
Fair Value Inputs, Cap Rate	10.25%	11.00%
Real Estate Portfolio Segment [Member] | Income Approach Valuation Technique [Member] | Residential [Member]
Impaired Loans
Fair Value Inputs, Cap Rate		13.75%
Other Real Estate Owned [Member] | Market Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value (in Dollars)	$ 2,535,884	$ 6,128,365
Other Real Estate Owned [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	12.50%	9.00%
Impaired Loans
Fair Value Inputs, Cap Rate		10.00%
Minimum [Member] | Commercial and Agricultural Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Commercial [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	(31.77%)
Fair Value Inputs, Management Adjustments	0.00%
Minimum [Member] | Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Commercial [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	(31.77%)	0.00%
Fair Value Inputs, Management Adjustments	0.00%	0.00%
Minimum [Member] | Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Commercial Construction [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	(5.00%)	(22.00%)
Fair Value Inputs, Management Adjustments	0.00%	0.00%
Minimum [Member] | Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Residential [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	(22.00%)	(2.30%)
Fair Value Inputs, Management Adjustments	0.00%	0.00%
Minimum [Member] | Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Farmland [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	(27.00%)	(8.30%)
Fair Value Inputs, Management Adjustments	10.00%	10.00%
Minimum [Member] | Other Real Estate Owned [Member] | Market Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	(50.80%)	(40.00%)
Fair Value Inputs, Management Adjustments	15.53%	0.33%
Maximum [Member] | Commercial and Agricultural Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Commercial [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	34.00%
Fair Value Inputs, Management Adjustments	10.00%
Maximum [Member] | Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Commercial [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	34.00%	0.00%
Fair Value Inputs, Management Adjustments	10.00%	90.00%
Maximum [Member] | Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Commercial Construction [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	99.00%	38.10%
Fair Value Inputs, Management Adjustments	10.00%	10.00%
Maximum [Member] | Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Residential [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	10.80%	191.70%
Fair Value Inputs, Management Adjustments	25.00%	10.00%
Maximum [Member] | Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Farmland [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	15.00%	252.50%
Fair Value Inputs, Management Adjustments	75.00%	50.00%
Maximum [Member] | Other Real Estate Owned [Member] | Market Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	142.90%	45.00%
Fair Value Inputs, Management Adjustments	72.75%	69.36%
Weighted Average [Member] | Commercial and Agricultural Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Commercial [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	(1.12%)
Fair Value Inputs, Management Adjustments	(5.00%)
Weighted Average [Member] | Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Commercial [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	(1.12%)	0.00%
Fair Value Inputs, Management Adjustments	(5.00%)	(45.00%)
Weighted Average [Member] | Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Commercial Construction [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	(47.00%)	(8.05%)
Fair Value Inputs, Management Adjustments	(5.00%)	(5.00%)
Weighted Average [Member] | Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Residential [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	(5.60%)	(94.70%)
Fair Value Inputs, Management Adjustments	(12.50%)	(5.00%)
Weighted Average [Member] | Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Farmland [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	(6.00%)	(122.10%)
Fair Value Inputs, Management Adjustments	(42.50%)	(30.00%)
Weighted Average [Member] | Other Real Estate Owned [Member] | Market Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	(46.05%)	(2.50%)
Fair Value Inputs, Management Adjustments	(43.37%)	(31.88%)

X

- Definition

Percentage of management adjustment to the observed price for a similar asset or liability when an identical transaction does not exist, used as an input to measure fair value.

+ References

No definition available.

+ Details

Name:	cban_FairValueInputsComparabilityManagementAdjustments
Namespace Prefix:	cban_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	cban_ImpairedLoansAbstract
Namespace Prefix:	cban_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

+ Details

Name:	us-gaap_AssetsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_FairValueInputsAssetsQuantitativeInformationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Ratio of the net operating income produced by an asset and its capital cost (original prices paid to buy the asset), used as an input to measure fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

+ Details

Name:	us-gaap_FairValueInputsCapRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of adjustment to the observed price for a similar asset or liability when an identical transaction does not exist, used as an input to measure fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

+ Details

Name:	us-gaap_FairValueInputsComparabilityAdjustments
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

+ Details

Name:	us-gaap_FairValueInputsDiscountRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=cban_CommercialAndAgriculturalPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ValuationTechniqueAxis=us-gaap_MarketApproachValuationTechniqueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsNonrecurringMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cban_CommercialMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ValuationTechniqueAxis=us-gaap_IncomeApproachValuationTechniqueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=cban_RealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cban_CommercialConstructionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cban_ResidentialMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cban_FarmlandMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByAssetClassAxis=cban_OtherRealEstateOwnedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_WeightedAverageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: