Loans (Schedule of Method Used to Measure Impairment of Impaired Loans) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Financing Receivable, Impaired [Line Items]
Impaired loans	$ 46,306	$ 48,416	$ 49,227
Commercial [Member] | Fair Value of Collateral [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	41	132	51
Commercial [Member] | Discounted Cash Flow [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	269	362	403
Owner Occupied [Member] | Fair Value of Collateral [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	795	1,683	1,257
Owner Occupied [Member] | Discounted Cash Flow [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	7,646	9,124	9,181
Non-Owner Occupied [Member] | Fair Value of Collateral [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	5,924	508	512
Non-Owner Occupied [Member] | Discounted Cash Flow [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	7,775	5,999	7,358
Land and Land Improvements [Member] | Fair Value of Collateral [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	10,047	11,998	12,934
Land and Land Improvements [Member] | Discounted Cash Flow [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	2,257	2,310	1,479
Non-Jumbo [Member] | Fair Value of Collateral [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	1,730	1,676	1,548
Non-Jumbo [Member] | Discounted Cash Flow [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	4,375	5,252	4,980
Jumbo [Member] | Fair Value of Collateral [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	3,792	7,594	7,791
Jumbo [Member] | Discounted Cash Flow [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	876	886	890
Home Equity [Member] | Fair Value of Collateral [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	186	285	285
Home Equity [Member] | Discounted Cash Flow [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	523	523	523
Consumer Portfolio Segment [Member] | Fair Value of Collateral [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	2	2	3
Consumer Portfolio Segment [Member] | Discounted Cash Flow [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	$ 68	$ 82	$ 32