Securities (Summary Of Securities Available For Sale In Unrealized Loss Position) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	$ 60,463	$ 64,194
Less than 12 months, Unrealized Loss	(746)	(1,228)
12 months or more, Estimated Fair Value	12,417	11,952
12 months or more, Unrealized Loss	(254)	(1,329)
Total Estimated Fair Value	72,880	76,146
Total Unrealized Loss	(1,000)	(2,557)
Temporarily Impaired Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	60,198	63,728
Less than 12 months, Unrealized Loss	(740)	(967)
12 months or more, Estimated Fair Value	11,824	6,314
12 months or more, Unrealized Loss	(134)	(427)
Total Estimated Fair Value	72,022	70,042
Total Unrealized Loss	(874)	(1,394)
Temporarily Impaired Securities [Member] | U. S. Government Agencies And Corporations [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value		1,074
Less than 12 months, Unrealized Loss		(10)
12 months or more, Estimated Fair Value		120
12 months or more, Unrealized Loss
Total Estimated Fair Value		1,194
Total Unrealized Loss		(10)
Temporarily Impaired Securities [Member] | Government-Sponsored Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	36,498	55,678
Less than 12 months, Unrealized Loss	(414)	(770)
12 months or more, Estimated Fair Value	8,997
12 months or more, Unrealized Loss	(78)
Total Estimated Fair Value	45,495	55,678
Total Unrealized Loss	(492)	(770)
Temporarily Impaired Securities [Member] | Nongovernment Sponsored Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value		5,558
Less than 12 months, Unrealized Loss	(4)	(158)
12 months or more, Estimated Fair Value	1,478	4,245
12 months or more, Unrealized Loss	(14)	(239)
Total Estimated Fair Value	1,478	9,803
Total Unrealized Loss	(18)	(397)
Temporarily Impaired Securities [Member] | State And Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	3,766
Less than 12 months, Unrealized Loss	(85)
12 months or more, Estimated Fair Value	387
12 months or more, Unrealized Loss	(4)
Total Estimated Fair Value	4,153
Total Unrealized Loss	(89)
Temporarily Impaired Securities [Member] | Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value
Less than 12 months, Unrealized Loss
12 months or more, Estimated Fair Value	962	817
12 months or more, Unrealized Loss	(38)	(182)
Total Estimated Fair Value	962	817
Total Unrealized Loss	(38)	(182)
Temporarily Impaired Securities [Member] | Tax-Exempt State And Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	19,934	1,418
Less than 12 months, Unrealized Loss	(237)	(29)
12 months or more, Estimated Fair Value		1,132
12 months or more, Unrealized Loss		(6)
Total Estimated Fair Value	19,934	2,550
Total Unrealized Loss	(237)	(35)
Other-Than-Temporarily Impaired Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	265	466
Less than 12 months, Unrealized Loss	(6)	(261)
12 months or more, Estimated Fair Value	593	5,638
12 months or more, Unrealized Loss	(120)	(902)
Total Estimated Fair Value	858	6,104
Total Unrealized Loss	(126)	(1,163)
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	265	466
Less than 12 months, Unrealized Loss	(6)	(261)
12 months or more, Estimated Fair Value	593	5,638
12 months or more, Unrealized Loss	(120)	(902)
Total Estimated Fair Value	858	6,104
Total Unrealized Loss	$ (126)	$ (1,163)