Loans (Impaired Financing Receivables) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Unpaid contractual principal balance	$ 32,814	$ 43,232	$ 32,814	$ 43,232	$ 38,193
Recorded investment with no allowance	22,848	36,553	22,848	36,553	28,220
Recorded investment with allowance	9,918	6,660	9,918	6,660	9,786
Total recorded investment	32,766	43,213	32,766	43,213	38,006
Related allowance	859	1,234	859	1,234	985
Average recorded investment	32,943	43,242	32,886	43,010	38,554
Interest income recognized	287	505	562	910	1,607
Consumer Loans [Member]
Unpaid contractual principal balance	5	41	5	41	24
Recorded investment with no allowance	5	41	5	41	24
Total recorded investment	5	41	5	41	24
Average recorded investment	8	44	12	47	39
Interest income recognized		1	1	2	3
Commercial Loans [Member]
Unpaid contractual principal balance	5,380	11,388	5,380	11,388	10,218
Recorded investment with no allowance	4,800	11,231	4,800	11,231	9,297
Recorded investment with allowance	580	157	580	157	921
Total recorded investment	5,380	11,388	5,380	11,388	10,218
Related allowance	269	40	269	40	304
Average recorded investment	5,585	11,379	5,672	11,321	10,600
Interest income recognized	46	149	93	227	432
Commercial Equipment [Member]
Unpaid contractual principal balance	399	174	399	174	335
Recorded investment with no allowance	212	152	212	152	234
Recorded investment with allowance	168	3	168	3	83
Total recorded investment	380	155	380	155	317
Related allowance	90	3	90	3	83
Average recorded investment	381	174	392	174	367
Interest income recognized	4		8		13
Home Equity and Second Mortgage [Member]
Unpaid contractual principal balance	403	214	403	214	207
Recorded investment with no allowance	330	214	330	214	207
Recorded investment with allowance	73		73
Total recorded investment	403	214	403	214	207
Related allowance	33		33
Average recorded investment	378	233	335	265	297
Interest income recognized	2	2	2	5	12
Construction and Land Development [Member]
Unpaid contractual principal balance	6,049	5,705	6,049	5,705	5,666
Recorded investment with no allowance	1,799	4,497	1,799	4,497	1,489
Recorded investment with allowance	4,250	1,208	4,250	1,208	4,177
Total recorded investment	6,049	5,705	6,049	5,705	5,666
Related allowance	81	170	81	170	55
Average recorded investment	6,015	5,574	5,916	5,295	5,386
Interest income recognized	28	71	56	147	252
Residential Mortgage [Member]
Unpaid contractual principal balance	3,078	5,236	3,078	5,236	3,401
Recorded investment with no allowance	2,559	4,328	2,559	4,328	2,695
Recorded investment with allowance	519	908	519	908	706
Total recorded investment	3,078	5,236	3,078	5,236	3,401
Related allowance	75	407	75	407	171
Average recorded investment	3,103	5,278	3,113	5,283	3,392
Interest income recognized	35	46	70	94	125
Commercial Real Estate [Member]
Unpaid contractual principal balance	17,500	20,474	17,500	20,474	18,342
Recorded investment with no allowance	13,143	16,090	13,143	16,090	14,274
Recorded investment with allowance	4,328	4,384	4,328	4,384	3,899
Total recorded investment	17,471	20,474	17,471	20,474	18,173
Related allowance	311	614	311	614	372
Average recorded investment	17,473	20,560	17,446	20,625	18,473
Interest income recognized	$ 172	$ 236	$ 332	$ 435	$ 770