Loans (Schedule of Loans Individually Evaluated for Impairment) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 42,147	$ 50,664	$ 42,502
Unpaid Principal Balance	42,159	50,679	42,513
Related Allowance	597	771	776
Average Impaired Balance	41,912	45,404	44,060
Interest Income Recognized while impaired	1,404	1,758	1,524
Commercial [Member]
Financing Receivable, Impaired [Line Items]
Without a related allowance, Recorded Investment	200	381	242
Without a related allowance, Unpaid Principal Balance	200	381	242
Without a related allowance, Average Impaired Balance	200	381	319
Without a related allowance, Interest Income Recognized while impaired	9	21	17
With a related allowance, Recorded Investment	0	0	0
With a related allowance, Unpaid Principal Balance	0	0	0
With a related allowance, Related Allowance	0	0	0
With a related allowance, Average Impaired Balance	0	0	0
With a related allowance, Interest Income Recognized while impaired	0	0	0
Owner Occupied [Member]
Financing Receivable, Impaired [Line Items]
Without a related allowance, Recorded Investment	5,446	9,312	5,401
Without a related allowance, Unpaid Principal Balance	5,446	9,312	5,402
Without a related allowance, Average Impaired Balance	5,446	5,364	5,438
Without a related allowance, Interest Income Recognized while impaired	211	180	191
With a related allowance, Recorded Investment	2,929	5,409	2,997
With a related allowance, Unpaid Principal Balance	2,929	5,409	2,997
With a related allowance, Related Allowance	89	255	45
With a related allowance, Average Impaired Balance	2,929	5,409	3,003
With a related allowance, Interest Income Recognized while impaired	112	215	135
Non-Owner Occupied [Member]
Financing Receivable, Impaired [Line Items]
Without a related allowance, Recorded Investment	11,352	5,183	10,740
Without a related allowance, Unpaid Principal Balance	11,353	5,185	10,741
Without a related allowance, Average Impaired Balance	11,353	3,858	9,982
Without a related allowance, Interest Income Recognized while impaired	299	180	310
With a related allowance, Recorded Investment	1,841	2,632	2,709
With a related allowance, Unpaid Principal Balance	1,841	2,632	2,709
With a related allowance, Related Allowance	151	21	386
With a related allowance, Average Impaired Balance	1,841	2,632	2,728
With a related allowance, Interest Income Recognized while impaired	71	123	72
Land and Land Improvements [Member]
Financing Receivable, Impaired [Line Items]
Without a related allowance, Recorded Investment	7,451	13,121	7,635
Without a related allowance, Unpaid Principal Balance	7,452	13,121	7,635
Without a related allowance, Average Impaired Balance	7,452	13,121	9,497
Without a related allowance, Interest Income Recognized while impaired	163	436	263
With a related allowance, Recorded Investment	1,152	898	1,139
With a related allowance, Unpaid Principal Balance	1,152	898	1,139
With a related allowance, Related Allowance	139	176	85
With a related allowance, Average Impaired Balance	1,152	898	1,154
With a related allowance, Interest Income Recognized while impaired	0	0	0
Construction [Member]
Financing Receivable, Impaired [Line Items]
Without a related allowance, Recorded Investment	0	0	0
Without a related allowance, Unpaid Principal Balance	0	0	0
Without a related allowance, Average Impaired Balance	0	0	0
Without a related allowance, Interest Income Recognized while impaired	0	0	0
With a related allowance, Recorded Investment	0	0	0
With a related allowance, Unpaid Principal Balance	0	0	0
With a related allowance, Related Allowance	0	0	0
With a related allowance, Average Impaired Balance	0	0	0
With a related allowance, Interest Income Recognized while impaired	0	0	0
Non-Jumbo [Member]
Financing Receivable, Impaired [Line Items]
Without a related allowance, Recorded Investment	4,060	3,763	3,590
Without a related allowance, Unpaid Principal Balance	4,071	3,772	3,600
Without a related allowance, Average Impaired Balance	3,824	3,772	3,316
Without a related allowance, Interest Income Recognized while impaired	169	167	160
With a related allowance, Recorded Investment	2,337	2,623	2,530
With a related allowance, Unpaid Principal Balance	2,337	2,624	2,531
With a related allowance, Related Allowance	187	276	226
With a related allowance, Average Impaired Balance	2,337	2,624	2,552
With a related allowance, Interest Income Recognized while impaired	112	119	114
Jumbo [Member]
Financing Receivable, Impaired [Line Items]
Without a related allowance, Recorded Investment	3,740	5,669	3,871
Without a related allowance, Unpaid Principal Balance	3,739	5,672	3,869
Without a related allowance, Average Impaired Balance	3,739	5,672	4,412
Without a related allowance, Interest Income Recognized while impaired	178	235	181
With a related allowance, Recorded Investment	867	883	871
With a related allowance, Unpaid Principal Balance	868	884	871
With a related allowance, Related Allowance	31	43	34
With a related allowance, Average Impaired Balance	868	884	878
With a related allowance, Interest Income Recognized while impaired	43	44	43
Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Without a related allowance, Recorded Investment	710	710	709
Without a related allowance, Unpaid Principal Balance	709	709	709
Without a related allowance, Average Impaired Balance	709	709	709
Without a related allowance, Interest Income Recognized while impaired	32	31	32
With a related allowance, Recorded Investment	0	0	0
With a related allowance, Unpaid Principal Balance	0	0	0
With a related allowance, Related Allowance	0	0	0
With a related allowance, Average Impaired Balance	0	0	0
With a related allowance, Interest Income Recognized while impaired	0	0	0
Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Without a related allowance, Recorded Investment	62	80	68
Without a related allowance, Unpaid Principal Balance	62	80	68
Without a related allowance, Average Impaired Balance	62	80	72
Without a related allowance, Interest Income Recognized while impaired	5	7	6
With a related allowance, Recorded Investment	0	0	0
With a related allowance, Unpaid Principal Balance	0	0	0
With a related allowance, Related Allowance	0	0	0
With a related allowance, Average Impaired Balance	0	0	0
With a related allowance, Interest Income Recognized while impaired	0	0	0
Total Without a Related Allowance
Financing Receivable, Impaired [Line Items]
Without a related allowance, Recorded Investment	33,021	38,219	32,256
Without a related allowance, Unpaid Principal Balance	33,032	38,232	32,266
Without a related allowance, Average Impaired Balance	32,785	32,957	33,745
Without a related allowance, Interest Income Recognized while impaired	1,066	1,257	1,160
Total With a Related Allowance
Financing Receivable, Impaired [Line Items]
With a related allowance, Recorded Investment	9,126	12,445	10,246
With a related allowance, Unpaid Principal Balance	9,127	12,447	10,247
With a related allowance, Related Allowance	597	771	776
With a related allowance, Average Impaired Balance	9,127	12,447	10,315
With a related allowance, Interest Income Recognized while impaired	338	501	364
Total Commercial
Financing Receivable, Impaired [Line Items]
Recorded Investment	30,371	36,936	30,863
Unpaid Principal Balance	30,373	36,938	30,865
Related Allowance	379	452	516
Average Impaired Balance	30,373	31,663	32,121
Interest Income Recognized while impaired	865	1,155	988
Total Residential Real Estate
Financing Receivable, Impaired [Line Items]
Recorded Investment	11,714	13,648	11,571
Unpaid Principal Balance	11,724	13,661	11,580
Related Allowance	218	319	260
Average Impaired Balance	11,477	13,661	11,867
Interest Income Recognized while impaired	534	596	530
Total Consumer
Financing Receivable, Impaired [Line Items]
Recorded Investment	62	80	68
Unpaid Principal Balance	62	80	68
Related Allowance	0	0	0
Average Impaired Balance	62	80	72
Interest Income Recognized while impaired	$ 5	$ 7	$ 6