Loans Loan Categories and Past Due Loans(Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Past Due 30 - 59 Days	$ 6,718	$ 4,303	$ 5,272
Loans Past Due 60 - 89 Days	1,782	4,388	2,064
Loans Past Due 90 or more Days	4,208	5,422	3,416
Total Loans Past Due	12,708	14,113	10,752
Current Loans	1,297,715	1,252,359	1,154,007
Total Loans	1,310,423	1,266,472	1,164,759
Loans 90 Days or More Past Due and Still Accruing Interest	347	652	259
Nonaccrual Loans	6,284	6,479	5,218
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Past Due 30 - 59 Days	597	304	428
Loans Past Due 60 - 89 Days	579	601	421
Loans Past Due 90 or more Days	29	177	130
Total Loans Past Due	1,205	1,082	979
Current Loans	88,671	86,811	88,188
Total Loans	89,876	87,893	89,167
Loans 90 Days or More Past Due and Still Accruing Interest	0	28	0
Nonaccrual Loans	182	352	253
Commercial Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Past Due 30 - 59 Days	0	0	0
Loans Past Due 60 - 89 Days	0	0	0
Loans Past Due 90 or more Days	0	0	0
Total Loans Past Due	0	0	0
Current Loans	28,026	27,815	27,380
Total Loans	28,026	27,815	27,380
Loans 90 Days or More Past Due and Still Accruing Interest	0	0	0
Nonaccrual Loans	0	0	0
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Past Due 30 - 59 Days	1,381	200	1,351
Loans Past Due 60 - 89 Days	237	1,200	200
Loans Past Due 90 or more Days	1,785	2,034	1,886
Total Loans Past Due	3,403	3,434	3,437
Current Loans	305,438	284,685	251,805
Total Loans	308,841	288,119	255,242
Loans 90 Days or More Past Due and Still Accruing Interest	0	0	0
Nonaccrual Loans	2,042	2,048	1,953
Other Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Past Due 30 - 59 Days	73	37	26
Loans Past Due 60 - 89 Days	16	19	10
Loans Past Due 90 or more Days	0	0	0
Total Loans Past Due	89	56	36
Current Loans	7,694	7,593	6,995
Total Loans	7,783	7,649	7,031
Loans 90 Days or More Past Due and Still Accruing Interest	0	0	0
Nonaccrual Loans	1	0	4
Automobile [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Past Due 30 - 59 Days	2,641	3,233	1,986
Loans Past Due 60 - 89 Days	512	1,041	375
Loans Past Due 90 or more Days	150	98	98
Total Loans Past Due	3,303	4,372	2,459
Current Loans	397,318	389,832	351,542
Total Loans	400,621	394,204	354,001
Loans 90 Days or More Past Due and Still Accruing Interest	0	0	0
Nonaccrual Loans	372	219	334
Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Past Due 30 - 59 Days	2,026	529	1,481
Loans Past Due 60 - 89 Days	438	1,527	1,058
Loans Past Due 90 or more Days	2,244	3,113	1,302
Total Loans Past Due	4,708	5,169	3,841
Current Loans	470,568	455,623	428,097
Total Loans	475,276	460,792	431,938
Loans 90 Days or More Past Due and Still Accruing Interest	347	624	259
Nonaccrual Loans	$ 3,687	$ 3,860	$ 2,674