Loans Impaired Loans (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Recorded Investment [Abstract]
With No Related Allowance	$ 3,386	$ 2,806	$ 3,386	$ 2,806	$ 4,395
With a Related Allowance	1,641		1,641
Unpaid Principal Balance [Abstract]
With No Related Allowance	3,219	2,806	3,219	2,806	4,395
With a Related Allowance	1,641		1,641
Average Recorded Balance [Abstract]
With No Related Allowance	3,639	2,798	3,891	2,789
With a Related Allowance	559		280
Impaired Financing Receivable, Interest Income, Accrual Method [Abstract]
With No Related Allowance	13	0	56	23
With a Related Allowance	0		0
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
With No Related Allowance	6	0	44	0
With a Related Allowance	0		0
Commercial [Member]
Recorded Investment [Abstract]
With No Related Allowance	58	0	58	0	66
With a Related Allowance	1,641		1,641
Unpaid Principal Balance [Abstract]
With No Related Allowance	58	0	58	0	66
With a Related Allowance	1,641		1,641
Average Recorded Balance [Abstract]
With No Related Allowance	60	0	62	0
With a Related Allowance	559		280
Impaired Financing Receivable, Interest Income, Accrual Method [Abstract]
With No Related Allowance	1	0	3	0
With a Related Allowance	0		0
Impaired Financing Receivable, Interest Income, Cash Basis Method [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
Impaired Financing Receivable, Interest Income, Accrual Method [Abstract]
With No Related Allowance	0	0	0	0
With a Related Allowance	0		0
Impaired Financing Receivable, Interest Income, Cash Basis Method [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	1,625	994	1,625	994	1,953
With a Related Allowance	0		0
Unpaid Principal Balance [Abstract]
With No Related Allowance	1,458	994	1,458	994	1,953
With a Related Allowance	0		0
Average Recorded Balance [Abstract]
With No Related Allowance	1,707	995	1,789	996
With a Related Allowance	0		0
Impaired Financing Receivable, Interest Income, Accrual Method [Abstract]
With No Related Allowance	6	0	44	0
With a Related Allowance	0		0
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
With No Related Allowance	6	0	44	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
Impaired Financing Receivable, Interest Income, Accrual Method [Abstract]
With No Related Allowance	0	0	0	0
With a Related Allowance	0		0
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
With No Related Allowance	0	0	0	0
With a Related Allowance	0		0
Automobile [Member]
Recorded Investment [Abstract]
With No Related Allowance	213	0	213	0	268
With a Related Allowance	0		0
Unpaid Principal Balance [Abstract]
With No Related Allowance	213	0	213	0	268
With a Related Allowance	0		0
Average Recorded Balance [Abstract]
With No Related Allowance	227	0	241	0
With a Related Allowance	0		0
Impaired Financing Receivable, Interest Income, Accrual Method [Abstract]
With No Related Allowance	3	0	5	0
With a Related Allowance	0		0
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
With No Related Allowance	0	0	0	0
With a Related Allowance	0		0
Residential [Member]
Recorded Investment [Abstract]
With No Related Allowance	1,490	1,812	1,490	1,812	2,108
With a Related Allowance	0		0
Unpaid Principal Balance [Abstract]
With No Related Allowance	1,490	1,812	1,490	1,812	2,108
With a Related Allowance	0		0
Average Recorded Balance [Abstract]
With No Related Allowance	1,645	1,803	1,799	1,793
With a Related Allowance	0		0
Impaired Financing Receivable, Interest Income, Accrual Method [Abstract]
With No Related Allowance	3	0	4	23
With a Related Allowance	0		0
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
With No Related Allowance	0	0	0	0
With a Related Allowance	$ 0		$ 0