Loans Impaired Loans (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Recorded Investment [Abstract]
With No Related Allowance	$ 3,342	$ 2,806	$ 3,342	$ 2,806	$ 4,395
With a Related Allowance	1,501		1,501
Unpaid Principal Balance [Abstract]
With No Related Allowance	3,509	2,806	3,509	2,806	4,395
With a Related Allowance	1,501		1,501
Average Recorded Balance [Abstract]
With No Related Allowance	3,365	2,806	3,708	2,794
With a Related Allowance	1,571		687
Interest Income Recognized [Abstract]
With No Related Allowance	19	0	75	23
With a Related Allowance	0		0
Cash Basis Income [Abstract]
With No Related Allowance	10	0	54	0
With a Related Allowance	0		0
Commercial [Member]
Recorded Investment [Abstract]
With No Related Allowance	52	0	52	0	66
With a Related Allowance	1,501		1,501
Unpaid Principal Balance [Abstract]
With No Related Allowance	52	0	52	0	66
With a Related Allowance	1,501		1,501
Average Recorded Balance [Abstract]
With No Related Allowance	55	0	59	0
With a Related Allowance	1,571		687
Interest Income Recognized [Abstract]
With No Related Allowance	2	0	5	0
With a Related Allowance	0		0
Cash Basis Income [Abstract]
With No Related Allowance	0	0	0	0
With a Related Allowance	0		0
Commercial Construction [Member]
Recorded Investment [Abstract]
With No Related Allowance	0	0	0	0	0
With a Related Allowance	0		0
Unpaid Principal Balance [Abstract]
With No Related Allowance	0	0	0	0	0
With a Related Allowance	0		0
Average Recorded Balance [Abstract]
With No Related Allowance	0	0	0	0
With a Related Allowance	0		0
Interest Income Recognized [Abstract]
With No Related Allowance	0	0	0	0
With a Related Allowance	0		0
Cash Basis Income [Abstract]
With No Related Allowance	0	0	0	0
With a Related Allowance	0		0
Commercial Real Estate [Member]
Recorded Investment [Abstract]
With No Related Allowance	1,574	994	1,574	994	1,953
With a Related Allowance	0		0
Unpaid Principal Balance [Abstract]
With No Related Allowance	1,741	994	1,741	994	1,953
With a Related Allowance	0		0
Average Recorded Balance [Abstract]
With No Related Allowance	1,600	994	1,717	995
With a Related Allowance	0		0
Interest Income Recognized [Abstract]
With No Related Allowance	10	0	54	0
With a Related Allowance	0		0
Cash Basis Income [Abstract]
With No Related Allowance	10	0	54	0
With a Related Allowance	0		0
Other Consumer [Member]
Recorded Investment [Abstract]
With No Related Allowance	0	0	0	0	0
With a Related Allowance	0		0
Unpaid Principal Balance [Abstract]
With No Related Allowance	0	0	0	0	0
With a Related Allowance	0		0
Average Recorded Balance [Abstract]
With No Related Allowance	0	0	0	0
With a Related Allowance	0		0
Interest Income Recognized [Abstract]
With No Related Allowance	0	0	0	0
With a Related Allowance	0		0
Cash Basis Income [Abstract]
With No Related Allowance	0	0	0	0
With a Related Allowance	0		0
Automobile [Member]
Recorded Investment [Abstract]
With No Related Allowance	204	0	204	0	268
With a Related Allowance	0		0
Unpaid Principal Balance [Abstract]
With No Related Allowance	204	0	204	0	268
With a Related Allowance	0		0
Average Recorded Balance [Abstract]
With No Related Allowance	209	0	229	0
With a Related Allowance	0		0
Interest Income Recognized [Abstract]
With No Related Allowance	4	0	9	0
With a Related Allowance	0		0
Cash Basis Income [Abstract]
With No Related Allowance	0	0	0	0
With a Related Allowance	0		0
Residential [Member]
Recorded Investment [Abstract]
With No Related Allowance	1,512	1,812	1,512	1,812	2,108
With a Related Allowance	0		0
Unpaid Principal Balance [Abstract]
With No Related Allowance	1,512	1,812	1,512	1,812	2,108
With a Related Allowance	0		0
Average Recorded Balance [Abstract]
With No Related Allowance	1,501	1,812	1,703	1,799
With a Related Allowance	0		0
Interest Income Recognized [Abstract]
With No Related Allowance	3	0	7	23
With a Related Allowance	0		0
Cash Basis Income [Abstract]
With No Related Allowance	0	0	0	0
With a Related Allowance	$ 0		$ 0