Loans (Schedule of Method Used to Measure Impairment of Impaired Loans) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Financing Receivable, Impaired [Line Items]
Impaired loans	$ 42,159	$ 42,513	$ 50,679
Commercial [Member] | Fair Value of Collateral [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	36	41	44
Commercial [Member] | Discounted Cash Flow [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	164	201	337
Owner Occupied [Member] | Fair Value of Collateral [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	1,271	783	5,665
Owner Occupied [Member] | Discounted Cash Flow [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	7,104	7,616	9,056
Non-Owner Occupied [Member] | Fair Value of Collateral [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	5,529	5,728	1,633
Non-Owner Occupied [Member] | Discounted Cash Flow [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	7,665	7,722	6,184
Land and Land Improvements [Member] | Fair Value of Collateral [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	6,444	6,597	11,733
Land and Land Improvements [Member] | Discounted Cash Flow [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	2,160	2,177	2,286
Non-Jumbo [Member] | Fair Value of Collateral [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	1,800	1,753	1,719
Non-Jumbo [Member] | Discounted Cash Flow [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	4,608	4,378	4,677
Jumbo [Member] | Fair Value of Collateral [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	3,739	3,869	5,672
Jumbo [Member] | Discounted Cash Flow [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	868	871	884
Home Equity [Member] | Fair Value of Collateral [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans	186	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	$ 62	$ 68	$ 78