Loans Impaired Loans (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Recorded Investment [Abstract]
With No Related Allowance	$ 2,776	$ 3,386	$ 2,776	$ 3,386	$ 3,866
With a Related Allowance	0	1,641	0	1,641	1,387
Unpaid Principal Balance [Abstract]
With No Related Allowance	2,776	3,219	2,776	3,219	4,033
With a Related Allowance	0	1,641	0	1,641	1,387
Average Recorded Balance [Abstract]
With No Related Allowance	2,793	3,639	3,322	3,891
With a Related Allowance	0	559	345	280
Interest Income Recognized [Abstract]
With No Related Allowance	4	13	11	56
With a Related Allowance	0	0	72	0
Cash Basis Income [Abstract]
With No Related Allowance	0	6	0	44
With a Related Allowance	0	0	72	0
Commercial [Member]
Recorded Investment [Abstract]
With No Related Allowance	33	58	33	58	45
With a Related Allowance	0	1,641	0	1,641	1,387
Unpaid Principal Balance [Abstract]
With No Related Allowance	33	58	33	58	45
With a Related Allowance	0	1,641	0	1,641	1,387
Average Recorded Balance [Abstract]
With No Related Allowance	35	60	39	62
With a Related Allowance	0	559	345	280
Interest Income Recognized [Abstract]
With No Related Allowance	1	1	2	3
With a Related Allowance	0	0	72	0
Cash Basis Income [Abstract]
With No Related Allowance	0	0	0	0
With a Related Allowance	0	0	72	0
Commercial Construction [Member]
Recorded Investment [Abstract]
With No Related Allowance	0	0	0	0	0
With a Related Allowance	0	0	0	0	0
Unpaid Principal Balance [Abstract]
With No Related Allowance	0	0	0	0	0
With a Related Allowance	0	0	0	0	0
Average Recorded Balance [Abstract]
With No Related Allowance	0	0	0	0
With a Related Allowance	0	0	0	0
Interest Income Recognized [Abstract]
With No Related Allowance	0	0	0	0
With a Related Allowance	0	0	0	0
Cash Basis Income [Abstract]
With No Related Allowance	0	0	0	0
With a Related Allowance	0	0	0	0
Commercial Real Estate [Member]
Recorded Investment [Abstract]
With No Related Allowance	1,481	1,625	1,481	1,625	2,528
With a Related Allowance	0	0	0	0	0
Unpaid Principal Balance [Abstract]
With No Related Allowance	1,481	1,458	1,481	1,458	2,695
With a Related Allowance	0	0	0	0	0
Average Recorded Balance [Abstract]
With No Related Allowance	1,493	1,707	2,005	1,789
With a Related Allowance	0	0	0	0
Interest Income Recognized [Abstract]
With No Related Allowance	0	6	0	44
With a Related Allowance	0	0	0	0
Cash Basis Income [Abstract]
With No Related Allowance	0	6	0	44
With a Related Allowance	0	0	0	0
Other Consumer [Member]
Recorded Investment [Abstract]
With No Related Allowance	0	0	0	0	0
With a Related Allowance	0	0	0	0	0
Unpaid Principal Balance [Abstract]
With No Related Allowance	0	0	0	0	0
With a Related Allowance	0	0	0	0	0
Average Recorded Balance [Abstract]
With No Related Allowance	0	0	0	0
With a Related Allowance	0	0	0	0
Interest Income Recognized [Abstract]
With No Related Allowance	0	0	0	0
With a Related Allowance	0	0	0	0
Cash Basis Income [Abstract]
With No Related Allowance	0	0	0	0
With a Related Allowance	0	0	0	0
Automobile [Member]
Recorded Investment [Abstract]
With No Related Allowance	184	213	184	213	203
With a Related Allowance	0	0	0	0	0
Unpaid Principal Balance [Abstract]
With No Related Allowance	184	213	184	213	203
With a Related Allowance	0	0	0	0	0
Average Recorded Balance [Abstract]
With No Related Allowance	183	227	194	241
With a Related Allowance	0	0	0	0
Interest Income Recognized [Abstract]
With No Related Allowance	3	3	5	5
With a Related Allowance	0	0	0	0
Cash Basis Income [Abstract]
With No Related Allowance	0	0	0	0
With a Related Allowance	0	0	0	0
Residential [Member]
Recorded Investment [Abstract]
With No Related Allowance	1,078	1,490	1,078	1,490	1,090
With a Related Allowance	0	0	0	0	0
Unpaid Principal Balance [Abstract]
With No Related Allowance	1,078	1,490	1,078	1,490	1,090
With a Related Allowance	0	0	0	0	0
Average Recorded Balance [Abstract]
With No Related Allowance	1,082	1,645	1,084	1,799
With a Related Allowance	0	0	0	0
Interest Income Recognized [Abstract]
With No Related Allowance	0	3	4	4
With a Related Allowance	0	0	0	0
Cash Basis Income [Abstract]
With No Related Allowance	0	0	0	0
With a Related Allowance	$ 0	$ 0	$ 0	$ 0

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Amount of average investment of impaired financing receivables for which there is no related allowance for credit losses.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (c)(1)

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