Securities (Summary Of Securities Available For Sale In Unrealized Loss Position) (Details) (USD $)	Sep. 30, 2012	Dec. 31, 2011
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	$ 48,466,000	$ 64,194,000
Less than 12 months, Unrealized Loss	(525,000)	(1,228,000)
12 months or more, Estimated Fair Value	12,283,000	11,952,000
12 months or more, Unrealized Loss	(422,000)	(1,329,000)
Total Estimated Fair Value	60,749,000	76,146,000
Total Unrealized Loss	(947,000)	(2,557,000)
Residential Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Total Unrealized Loss	(290,000)
Temporarily Impaired Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	48,466,000	63,728,000
Less than 12 months, Unrealized Loss	(525,000)	(967,000)
12 months or more, Estimated Fair Value	11,580,000	6,314,000
12 months or more, Unrealized Loss	(203,000)	(427,000)
Total Estimated Fair Value	60,046,000	70,042,000
Total Unrealized Loss	(728,000)	(1,394,000)
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	1,413,000	1,074,000
Less than 12 months, Unrealized Loss	(4,000)	(10,000)
12 months or more, Estimated Fair Value		120,000
12 months or more, Unrealized Loss
Total Estimated Fair Value	1,413,000	1,194,000
Total Unrealized Loss	(4,000)	(10,000)
Temporarily Impaired Securities [Member] | Government-Sponsored Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	35,490,000	55,678,000
Less than 12 months, Unrealized Loss	(395,000)	(770,000)
12 months or more, Estimated Fair Value	7,256,000
12 months or more, Unrealized Loss	(58,000)
Total Estimated Fair Value	42,746,000	55,678,000
Total Unrealized Loss	(453,000)	(770,000)
Temporarily Impaired Securities [Member] | Nongovernment-Sponsored Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	1,000	5,558,000
Less than 12 months, Unrealized Loss	(4,000)	(158,000)
12 months or more, Estimated Fair Value	3,013,000	4,245,000
12 months or more, Unrealized Loss	(67,000)	(239,000)
Total Estimated Fair Value	3,014,000	9,803,000
Total Unrealized Loss	(71,000)	(397,000)
Temporarily Impaired Securities [Member] | State And Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	3,370,000
Less than 12 months, Unrealized Loss	(52,000)
12 months or more, Estimated Fair Value	386,000
12 months or more, Unrealized Loss	(4,000)
Total Estimated Fair Value	3,756,000
Total Unrealized Loss	(56,000)
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	925,000	817,000
12 months or more, Unrealized Loss	(74,000)	(182,000)
Total Estimated Fair Value	925,000	817,000
Total Unrealized Loss	(74,000)	(182,000)
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	8,192,000	1,418,000
Less than 12 months, Unrealized Loss	(70,000)	(29,000)
12 months or more, Estimated Fair Value		1,132,000
12 months or more, Unrealized Loss		(6,000)
Total Estimated Fair Value	8,192,000	2,550,000
Total Unrealized Loss	(70,000)	(35,000)
Other-Than-Temporarily Impaired Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value		466,000
Less than 12 months, Unrealized Loss		(261,000)
12 months or more, Estimated Fair Value	703,000	5,638,000
12 months or more, Unrealized Loss	(219,000)	(902,000)
Total Estimated Fair Value	703,000	6,104,000
Total Unrealized Loss	(219,000)	(1,163,000)
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		466,000
Less than 12 months, Unrealized Loss		(261,000)
12 months or more, Estimated Fair Value	703,000	5,638,000
12 months or more, Unrealized Loss	(219,000)	(902,000)
Total Estimated Fair Value	703,000	6,104,000
Total Unrealized Loss	$ (219,000)	$ (1,163,000)