Loans (Schedule of Method Used to Measure Impairment of Impaired Loans) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015
Financing Receivable, Impaired [Line Items]
Impaired loans	$ 39,043	$ 42,513	$ 46,306
Commercial [Member] | Fair Value of Collateral [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	650	41	41
Commercial [Member] | Discounted Cash Flow [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	159	201	269
Owner Occupied [Member] | Fair Value of Collateral [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	318	783	795
Owner Occupied [Member] | Discounted Cash Flow [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	7,095	7,616	7,646
Non-Owner Occupied [Member] | Fair Value of Collateral [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	4,596	5,728	5,924
Non-Owner Occupied [Member] | Discounted Cash Flow [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	7,121	7,722	7,775
Land and Land Improvements [Member] | Fair Value of Collateral [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	5,191	6,597	10,047
Land and Land Improvements [Member] | Discounted Cash Flow [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	2,131	2,177	2,257
Non-Jumbo [Member] | Fair Value of Collateral [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	1,732	1,753	1,730
Non-Jumbo [Member] | Discounted Cash Flow [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	4,748	4,378	4,375
Jumbo [Member] | Fair Value of Collateral [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	3,682	3,869	3,792
Jumbo [Member] | Discounted Cash Flow [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	859	871	876
Home Equity [Member] | Fair Value of Collateral [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	190	186	186
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	0	0	2
Consumer Portfolio Segment [Member] | Discounted Cash Flow [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	$ 48	$ 68	$ 68