Allowance for Loan Losses, Nonperforming Assets and Impaired Loans, Troubled Debt Restructurings (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2012 Contract	Mar. 31, 2013 Contract
Financing Receivable Modifications [Abstract]
Number of Contracts	5	2
Pre-Modification Outstanding Principal Balance	$ 465	$ 3,654
Post-Modification Outstanding Principal Balance	493	3,739
Impairment Accrued	156
Increase in balance of trouble debt restructurings	10
Troubled debt restructurings total	7,281	7,423
Troubled debt restructurings special allocation	289	1
Financing Receivable Modifications Subsequent Default [Abstract]
Number of Contracts	4	4
Principal balance	392	1,071
Construction other [Member]
Financing Receivable Modifications [Abstract]
Number of Contracts		1
Pre-Modification Outstanding Principal Balance		3,500
Post-Modification Outstanding Principal Balance		3,500
Consumer Real Estate [Member] \| Closed-end First Liens [Member]
Financing Receivable Modifications [Abstract]
Number of Contracts	3
Pre-Modification Outstanding Principal Balance	305
Post-Modification Outstanding Principal Balance	324
Impairment Accrued	47
Financing Receivable Modifications Subsequent Default [Abstract]
Number of Contracts	1	1
Principal balance	17	101
Consumer Real Estate [Member] \| Closed-end Junior Liens [Member]
Financing Receivable Modifications [Abstract]
Number of Contracts	1
Pre-Modification Outstanding Principal Balance	143
Post-Modification Outstanding Principal Balance	147
Impairment Accrued	109
Financing Receivable Modifications Subsequent Default [Abstract]
Number of Contracts		1
Principal balance		88
Consumer Non Real Estate [Member] \| Commercial and Industrial [Member]
Financing Receivable Modifications Subsequent Default [Abstract]
Number of Contracts		1
Principal balance		219
Consumer Non Real Estate [Member] \| Other Consumer Loans [Member]
Financing Receivable Modifications Subsequent Default [Abstract]
Number of Contracts	1
Principal balance	67
Commercial Real Estate [Member] \| Commercial Real Estate, Owner Occupied [Member]
Financing Receivable Modifications [Abstract]
Number of Contracts	1	1
Pre-Modification Outstanding Principal Balance	17	154
Post-Modification Outstanding Principal Balance	22	239
Impairment Accrued	0
Financing Receivable Modifications Subsequent Default [Abstract]
Number of Contracts		1
Principal balance		663
Commercial Real Estate [Member] \| Multifamily real estate [Member]
Financing Receivable Modifications Subsequent Default [Abstract]
Number of Contracts	1
Principal balance	250
Commercial Non Real Estate [Member] \| Commercial and Industrial [Member]
Financing Receivable Modifications Subsequent Default [Abstract]
Number of Contracts	1
Principal balance	$ 58

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Represents the amount of investment in troubled debt restructures that exceeds fair value, as determined by the impairment measurement, as of the end of the period.

+ References

No definition available.

+ Details

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- Definition

Refers to increase in loans previously modified and reported as trouble debt restructurings in prior quarters.

+ References

No definition available.

+ Details

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- Definition

Number of financing receivables that have been modified by troubled debt restructurings.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 33

-URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953676-111524

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- Definition

Amount of investment in financing receivables (after modification) modified by troubled debt restructurings.

+ References

+ Details

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- Definition

Amount of investment in financing receivables (before modification) modified by troubled debt restructurings.

+ References

+ Details

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- Definition

The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 40

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6951948&loc=d3e18845-111554

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- Definition

Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 34

-URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953682-111524

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- Definition

Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which there was a payment default.

+ References

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- Definition

Amount of receivables for which the allowance for credit losses had previously been measured under a general allowance for credit losses methodology, and are now identified as troubled debt restructurings.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 40

-Section 65

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=7484272&loc=SL7484277-172609

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