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Fair Value Measurements (Information Regarding Quantitative Inputs Used To Value Assets Classified As Level 3 ) (Details) (Significant Unobservable Inputs (Level 3) [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value	7,089	6,836
Impaired Loans [Member] | Maximum [Member] | Discounted Appraised Value [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Selling cost	10.00%	10.00%
Discount for lack of marketability and age of appraisal	25.00%	25.00%
Impaired Loans [Member] | Minimum [Member] | Discounted Appraised Value [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Selling cost	5.00%	5.00%
Discount for lack of marketability and age of appraisal	0.00%	0.00%
Impaired Loans [Member] | Weighted Average [Member] | Discounted Appraised Value [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Selling cost	6.00%	6.00%
Discount for lack of marketability and age of appraisal	15.00%	15.00%
OREO [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value	2,318	2,112
OREO [Member] | Maximum [Member] | Discounted Appraised Value [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Selling cost	10.00%	10.00%
Discount for lack of marketability and age of appraisal	25.00%	25.00%
OREO [Member] | Minimum [Member] | Discounted Appraised Value [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Selling cost	5.00%	5.00%
Discount for lack of marketability and age of appraisal	0.00%	0.00%
OREO [Member] | Weighted Average [Member] | Discounted Appraised Value [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Selling cost	6.00%	6.00%
Discount for lack of marketability and age of appraisal	15.00%	15.00%

X

- Definition

This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

+ 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=7578670&loc=d3e19207-110258

+ Details

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

X

- Details

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

X

- Definition

Adjustment to the discount rate used to measure fair value for lack of ability to convert business interests into cash quickly.

+ 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=7578670&loc=d3e19207-110258

+ Details

Name:	us-gaap_FairValueInputsDiscountForLackOfMarketability
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=7578670&loc=d3e19207-110258

+ Details

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