Loans (Impaired Financing Receivables) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Unpaid contractual principal balance	$ 42,115	$ 40,740	$ 42,115	$ 40,740	$ 38,193
Recorded investment with no allowance	32,085	35,136	32,085	35,136	28,220
Recorded investment with allowance	9,983	5,416	9,983	5,416	9,786
Total recorded investment	42,068	40,552	42,068	40,552	38,006
Related allowance	771	1,045	771	1,045	985
Average recorded investment	41,795	40,805	42,026	40,972	38,554
Interest income recognized	481	385	1,162	1,261	1,607
Consumer Loans [Member]
Unpaid contractual principal balance		32		32	24
Recorded investment with no allowance		32		32	24
Recorded investment with allowance
Total recorded investment		32		32	24
Related allowance
Average recorded investment		36		43	39
Interest income recognized		1		3	3
Commercial Loans [Member]
Unpaid contractual principal balance	7,318	11,055	7,318	11,055	10,218
Recorded investment with no allowance	6,912	10,334	6,912	10,334	9,297
Recorded investment with allowance	406	721	406	721	921
Total recorded investment	7,318	11,055	7,318	11,055	10,218
Related allowance	95	292	95	292	304
Average recorded investment	7,238	11,028	7,282	10,968	10,600
Interest income recognized	61	67	188	292	432
Commercial Equipment [Member]
Unpaid contractual principal balance	542	336	542	336	335
Recorded investment with no allowance	357	294	357	294	234
Recorded investment with allowance	166	23	166	23	83
Total recorded investment	523	317	523	317	317
Related allowance	89	23	89	23	83
Average recorded investment	526	336	536	351	367
Interest income recognized	7	1	16	8	13
Home Equity and Second Mortgage [Member]
Unpaid contractual principal balance	548	58	548	58	207
Recorded investment with no allowance	475	58	475	58	207
Recorded investment with allowance	73		73
Total recorded investment	548	58	548	58	207
Related allowance	59		59
Average recorded investment	556	120	485	217	297
Interest income recognized	5	1	8	6	12
Construction and Land Development [Member]
Unpaid contractual principal balance	7,631	5,350	7,631	5,350	5,666
Recorded investment with no allowance	3,377	5,350	3,377	5,350	1,489
Recorded investment with allowance	4,254		4,254		4,177
Total recorded investment	7,631	5,350	7,631	5,350	5,666
Related allowance	81		81		55
Average recorded investment	7,427	5,363	7,591	5,312	5,386
Interest income recognized	41	77	123	224	252
Residential Mortgage [Member]
Unpaid contractual principal balance	3,130	3,883	3,130	3,883	3,401
Recorded investment with no allowance	2,614	3,182	2,614	3,182	2,695
Recorded investment with allowance	516	701	516	701	706
Total recorded investment	3,130	3,883	3,130	3,883	3,401
Related allowance	75	171	75	171	171
Average recorded investment	3,069	3,911	3,130	3,920	3,392
Interest income recognized	40	30	108	97	125
Commercial Real Estate [Member]
Unpaid contractual principal balance	22,946	20,026	22,946	20,026	18,342
Recorded investment with no allowance	18,350	15,886	18,350	15,886	14,274
Recorded investment with allowance	4,568	3,971	4,568	3,971	3,899
Total recorded investment	22,918	19,857	22,918	19,857	18,173
Related allowance	372	559	372	559	372
Average recorded investment	22,979	20,011	23,002	20,161	18,473
Interest income recognized	$ 327	$ 208	$ 719	$ 631	$ 770