Loans (Impaired Financing Receivables) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Unpaid contractual principal balance	$ 43,469	$ 32,814	$ 43,469	$ 32,814	$ 50,521
Recorded investment with no allowance	38,464	22,848	38,464	22,848	45,587
Recorded investment with allowance	4,739	9,918	4,739	9,918	4,122
Total recorded investment	43,203	32,766	43,203	32,766	49,709
Related allowance	1,473	859	1,473	859	451
Average recorded investment	43,354	32,943	43,334	32,886	50,021
Interest income recognized	328	287	697	562	1,840
Consumer Loans [Member]
Unpaid contractual principal balance		5		5
Recorded investment with no allowance		5		5
Total recorded investment		5		5
Average recorded investment		8		12
Interest income recognized				1
Commercial Loans [Member]
Unpaid contractual principal balance	5,184	5,380	5,184	5,380	7,587
Recorded investment with no allowance	4,499	4,800	4,499	4,800	7,030
Recorded investment with allowance	581	580	581	580	406
Total recorded investment	5,080	5,380	5,080	5,380	7,436
Related allowance	227	269	227	269	155
Average recorded investment	5,041	5,585	5,034	5,672	7,196
Interest income recognized	44	46	96	93	252
Commercial Equipment [Member]
Unpaid contractual principal balance	1,462	399	1,462	399	605
Recorded investment with no allowance	292	212	292	212	373
Recorded investment with allowance	1,097	168	1,097	168	213
Total recorded investment	1,389	380	1,389	380	586
Related allowance	1,021	90	1,021	90	123
Average recorded investment	1,401	381	1,407	392	623
Interest income recognized	12	4	26	8	23
Home Equity and Second Mortgage [Member]
Unpaid contractual principal balance	488	403	488	403	708
Recorded investment with no allowance	429	330	429	330	649
Recorded investment with allowance		73		73
Total recorded investment	429	403	429	403	649
Related allowance		33		33
Average recorded investment	434	378	437	335	630
Interest income recognized	2	2	6	2	19
Construction and Land Development [Member]
Unpaid contractual principal balance	4,329	6,049	4,329	6,049	6,402
Recorded investment with no allowance	4,329	1,799	4,329	1,799	6,102
Recorded investment with allowance		4,250		4,250
Total recorded investment	4,329	6,049	4,329	6,049	6,102
Related allowance		81		81
Average recorded investment	4,382	6,015	4,285	5,916	6,474
Interest income recognized	4	28	7	56	133
Residential Mortgage [Member]
Unpaid contractual principal balance	3,996	3,078	3,996	3,078	3,407
Recorded investment with no allowance	3,491	2,559	3,491	2,559	2,526
Recorded investment with allowance	505	519	505	519	881
Total recorded investment	3,996	3,078	3,996	3,078	3,407
Related allowance	75	75	75	75	76
Average recorded investment	4,006	3,103	4,016	3,113	3,426
Interest income recognized	34	35	74	70	155
Commercial Real Estate [Member]
Unpaid contractual principal balance	28,010	17,500	28,010	17,500	31,812
Recorded investment with no allowance	25,424	13,143	25,424	13,143	28,907
Recorded investment with allowance	2,556	4,328	2,556	4,328	2,622
Total recorded investment	27,980	17,471	27,980	17,471	31,529
Related allowance	150	311	150	311	97
Average recorded investment	28,090	17,473	28,155	17,446	31,672
Interest income recognized	$ 232	$ 172	$ 488	$ 332	$ 1,258