Loans Impaired Loans (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Recorded Investment [Abstract]
With No Related Allowance	$ 3,411	$ 3,342	$ 3,411	$ 3,342	$ 3,866
With a Related Allowance	0	1,501	0	1,501	1,387
Unpaid Principal Balance [Abstract]
With No Related Allowance	3,411	3,509	3,411	3,509	4,033
With a Related Allowance	0	1,501	0	1,501	1,387
Average Recorded Balance [Abstract]
With No Related Allowance	3,094	3,365	3,639	3,708
With a Related Allowance	0	1,571	694	687
Interest Income Recognized [Abstract]
With No Related Allowance	4	19	15	75
With a Related Allowance	0	0	72	0
Cash Basis Income [Abstract]
With No Related Allowance	0	10	0	54
With a Related Allowance	0	0	72	0
Commercial [Member]
Recorded Investment [Abstract]
With No Related Allowance	25	52	25	52	45
With a Related Allowance	0	1,501	0	1,501	1,387
Unpaid Principal Balance [Abstract]
With No Related Allowance	25	52	25	52	45
With a Related Allowance	0	1,501	0	1,501	1,387
Average Recorded Balance [Abstract]
With No Related Allowance	29	55	35	59
With a Related Allowance	0	1,571	694	687
Interest Income Recognized [Abstract]
With No Related Allowance	1	2	3	5
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	1,497	1,574	1,497	1,574	2,528
With a Related Allowance	0	0	0	0	0
Unpaid Principal Balance [Abstract]
With No Related Allowance	1,497	1,741	1,497	1,741	2,695
With a Related Allowance	0	0	0	0	0
Average Recorded Balance [Abstract]
With No Related Allowance	1,489	1,600	2,013	1,717
With a Related Allowance	0	0	0	0
Interest Income Recognized [Abstract]
With No Related Allowance	0	10	0	54
With a Related Allowance	0	0	0	0
Cash Basis Income [Abstract]
With No Related Allowance	0	10	0	54
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	169	204	169	204	203
With a Related Allowance	0	0	0	0	0
Unpaid Principal Balance [Abstract]
With No Related Allowance	169	204	169	204	203
With a Related Allowance	0	0	0	0	0
Average Recorded Balance [Abstract]
With No Related Allowance	177	209	186	229
With a Related Allowance	0	0	0	0
Interest Income Recognized [Abstract]
With No Related Allowance	1	4	6	9
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	1,720	1,512	1,720	1,512	1,090
With a Related Allowance	0	0	0	0	0
Unpaid Principal Balance [Abstract]
With No Related Allowance	1,720	1,512	1,720	1,512	1,090
With a Related Allowance	0	0	0	0	0
Average Recorded Balance [Abstract]
With No Related Allowance	1,399	1,501	1,405	1,703
With a Related Allowance	0	0	0	0
Interest Income Recognized [Abstract]
With No Related Allowance	2	3	6	7
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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