Securities (Summary Of Securities Available For Sale In Unrealized Loss Position) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	$ 75,212	$ 49,087
Less than 12 months, Unrealized Loss	(921)	(600)
12 months or more, Estimated Fair Value	14,642	32,701
12 months or more, Unrealized Loss	(306)	(367)
Total Estimated Fair Value	89,854	81,788
Total Unrealized Loss	(1,227)	(967)
Temporarily Impaired Securities Member
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	75,212	49,087
Less than 12 months, Unrealized Loss	(921)	(600)
12 months or more, Estimated Fair Value	14,642	32,701
12 months or more, Unrealized Loss	(306)	(367)
Total Estimated Fair Value	89,854	81,788
Total Unrealized Loss	(1,227)	(967)
Temporarily Impaired Securities Member | U.S. Government and agencies and corporations [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	2,104	0
Less than 12 months, Unrealized Loss	(2)	0
12 months or more, Estimated Fair Value	3,151	3,912
12 months or more, Unrealized Loss	(47)	(52)
Total Estimated Fair Value	5,255	3,912
Total Unrealized Loss	(49)	(52)
Temporarily Impaired Securities Member | Government-sponsored agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	52,970	36,825
Less than 12 months, Unrealized Loss	(569)	(535)
12 months or more, Estimated Fair Value	8,672	21,915
12 months or more, Unrealized Loss	(226)	(238)
Total Estimated Fair Value	61,642	58,740
Total Unrealized Loss	(795)	(773)
Temporarily Impaired Securities Member | Nongovernment-sponsored entities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	2,298	5,488
Less than 12 months, Unrealized Loss	0	(44)
12 months or more, Estimated Fair Value	2,819	2,163
12 months or more, Unrealized Loss	(33)	(4)
Total Estimated Fair Value	5,117	7,651
Total Unrealized Loss	(33)	(48)
Temporarily Impaired Securities Member | State and political subdivisions, General obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value		0
Less than 12 months, Unrealized Loss		0
12 months or more, Estimated Fair Value		316
12 months or more, Unrealized Loss		(33)
Total Estimated Fair Value		316
Total Unrealized Loss		(33)
Temporarily Impaired Securities Member | State and political subdivisions, Water and sewer revenues [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value		0
Less than 12 months, Unrealized Loss		0
12 months or more, Estimated Fair Value		817
12 months or more, Unrealized Loss		(7)
Total Estimated Fair Value		817
Total Unrealized Loss		(7)
Temporarily Impaired Securities Member | State and political subdivisions, Other revenues [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	1,702	1,098
Less than 12 months, Unrealized Loss	(26)	(2)
12 months or more, Estimated Fair Value	0	0
12 months or more, Unrealized Loss	0	0
Total Estimated Fair Value	1,702	1,098
Total Unrealized Loss	(26)	(2)
Temporarily Impaired Securities Member | Corporate debt securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	8,367	0
Less than 12 months, Unrealized Loss	(268)	0
12 months or more, Estimated Fair Value	0	0
12 months or more, Unrealized Loss	0	0
Total Estimated Fair Value	8,367	0
Total Unrealized Loss	(268)	0
Temporarily Impaired Securities Member | Tax Exempt State and Political Subdivisions General Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	5,977	3,708
Less than 12 months, Unrealized Loss	(41)	(8)
12 months or more, Estimated Fair Value	0	438
12 months or more, Unrealized Loss	0	(4)
Total Estimated Fair Value	5,977	4,146
Total Unrealized Loss	(41)	(12)
Temporarily Impaired Securities Member | Tax Exempt State and Political Subdivisions Water and Sewer Revenues [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value		721
Less than 12 months, Unrealized Loss		(3)
12 months or more, Estimated Fair Value		0
12 months or more, Unrealized Loss		0
Total Estimated Fair Value		721
Total Unrealized Loss		(3)
Temporarily Impaired Securities Member | Tax Exempt State and Political Subdivisions Lease Revenues [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	576	0
Less than 12 months, Unrealized Loss	(1)	0
12 months or more, Estimated Fair Value	0	1,168
12 months or more, Unrealized Loss	0	(10)
Total Estimated Fair Value	576	1,168
Total Unrealized Loss	(1)	(10)
Temporarily Impaired Securities Member | Tax Exempt State and Political Subdivisions Lottery/casino Revenues [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value		0
Less than 12 months, Unrealized Loss		0
12 months or more, Estimated Fair Value		1,126
12 months or more, Unrealized Loss		(9)
Total Estimated Fair Value		1,126
Total Unrealized Loss		(9)
Temporarily Impaired Securities Member | Tax Exempt State and Political Subdivisions Other Revenues [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	1,218	1,247
Less than 12 months, Unrealized Loss	(14)	(8)
12 months or more, Estimated Fair Value	0	846
12 months or more, Unrealized Loss	0	(10)
Total Estimated Fair Value	1,218	2,093
Total Unrealized Loss	(14)	(18)
Other Than Temporarily Impaired Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	0	0
Less than 12 months, Unrealized Loss	0	0
12 months or more, Estimated Fair Value	0	0
12 months or more, Unrealized Loss	0	0
Total Estimated Fair Value	0	0
Total Unrealized Loss	$ 0	$ 0