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Concentrations of Credit Risk (Details)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Hotel/motel industry credits [Member]
Concentration Risk [Line Items]
Concentration of credit risk (in hundredths)	35.00%	37.00%
Lessors of residential buildings and dwellings credits [Member]
Concentration Risk [Line Items]
Concentration of credit risk (in hundredths)	32.00%	33.00%
Lessors of non-residential buildings [Member]
Concentration Risk [Line Items]
Concentration of credit risk (in hundredths)	30.00%	29.00%
Agriculture Credits [Member]
Concentration Risk [Line Items]
Concentration of credit risk (in hundredths)	17.00%	17.00%
Coal mining and related support industries credits [Member]
Concentration Risk [Line Items]
Concentration of credit risk (in hundredths)	16.00%	22.00%

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 18

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13537-108611



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13531-108611

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