Securities (Summary Of Securities Available For Sale In Unrealized Loss Position) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	$ 52,484	$ 123,127
Less than 12 months, Unrealized Loss	(630)	(3,876)
12 months or more, Estimated Fair Value	35,043	22,303
12 months or more, Unrealized Loss	(625)	(809)
Total Estimated Fair Value	87,527	145,430
Total Unrealized Loss	(1,255)	(4,685)
Temporarily Impaired Securities Member
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	52,484	123,127
Less than 12 months, Unrealized Loss	(630)	(3,876)
12 months or more, Estimated Fair Value	35,043	22,302
12 months or more, Unrealized Loss	(625)	(807)
Total Estimated Fair Value	87,527	145,429
Total Unrealized Loss	(1,255)	(4,683)
Temporarily Impaired Securities Member | U S Government Corporations And Agencies Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	1,399	10,868
Less than 12 months, Unrealized Loss	(3)	(118)
12 months or more, Estimated Fair Value	2,682	0
12 months or more, Unrealized Loss	(44)	0
Total Estimated Fair Value	4,081	10,868
Total Unrealized Loss	(47)	(118)
Temporarily Impaired Securities Member | Government Sponsored Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	38,707	55,035
Less than 12 months, Unrealized Loss	(548)	(1,385)
12 months or more, Estimated Fair Value	20,979	13,249
12 months or more, Unrealized Loss	(343)	(188)
Total Estimated Fair Value	59,686	68,284
Total Unrealized Loss	(891)	(1,573)
Temporarily Impaired Securities Member | Nongovernment Sponsored Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	4,151	2,407
Less than 12 months, Unrealized Loss	(28)	(12)
12 months or more, Estimated Fair Value	58	565
12 months or more, Unrealized Loss	0	(7)
Total Estimated Fair Value	4,209	2,972
Total Unrealized Loss	(28)	(19)
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	707	4,505
Less than 12 months, Unrealized Loss	(2)	(264)
12 months or more, Estimated Fair Value	2,798	2,337
12 months or more, Unrealized Loss	(64)	(211)
Total Estimated Fair Value	3,505	6,842
Total Unrealized Loss	(66)	(475)
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	1,309
Less than 12 months, Unrealized Loss	0	(31)
12 months or more, Estimated Fair Value	1,838	1,554
12 months or more, Unrealized Loss	(36)	(83)
Total Estimated Fair Value	1,838	2,863
Total Unrealized Loss	(36)	(114)
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	1,098	3,142
Less than 12 months, Unrealized Loss	(12)	(142)
12 months or more, Estimated Fair Value	0	0
12 months or more, Unrealized Loss	0	0
Total Estimated Fair Value	1,098	3,142
Total Unrealized Loss	(12)	(142)
Temporarily Impaired Securities Member | Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	0	2,968
Less than 12 months, Unrealized Loss	0	(31)
12 months or more, Estimated Fair Value	0	0
12 months or more, Unrealized Loss	0	0
Total Estimated Fair Value	0	2,968
Total Unrealized Loss	0	(31)
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	4,234	19,603
Less than 12 months, Unrealized Loss	(12)	(997)
12 months or more, Estimated Fair Value	2,613	2,102
12 months or more, Unrealized Loss	(50)	(157)
Total Estimated Fair Value	6,847	21,705
Total Unrealized Loss	(62)	(1,154)
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	2,188	5,643
Less than 12 months, Unrealized Loss	(25)	(224)
12 months or more, Estimated Fair Value	0	983
12 months or more, Unrealized Loss	0	(82)
Total Estimated Fair Value	2,188	6,626
Total Unrealized Loss	(25)	(306)
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	0	6,112
Less than 12 months, Unrealized Loss	0	(349)
12 months or more, Estimated Fair Value	2,126	958
12 months or more, Unrealized Loss	(38)	(42)
Total Estimated Fair Value	2,126	7,070
Total Unrealized Loss	(38)	(391)
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	2,720
Less than 12 months, Unrealized Loss	0	(132)
12 months or more, Estimated Fair Value	0	554
12 months or more, Unrealized Loss		(37)
Total Estimated Fair Value	0	3,274
Total Unrealized Loss	0	(169)
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	0	8,815
Less than 12 months, Unrealized Loss	0	(191)
12 months or more, Estimated Fair Value	1,949	0
12 months or more, Unrealized Loss	(50)	0
Total Estimated Fair Value	1,949	8,815
Total Unrealized Loss	(50)	(191)
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	1
12 months or more, Unrealized Loss	0	(2)
Total Estimated Fair Value	0	1
Total Unrealized Loss	0	(2)
Other Than Temporarily Impaired Securities [Member] | Nongovernment Sponsored Agencies [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	1
12 months or more, Unrealized Loss	0	(2)
Total Estimated Fair Value	0	1
Total Unrealized Loss	$ 0	$ (2)