Securities (Summary Of Securities Available For Sale In Unrealized Loss Position) (Details) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	$ 67,040,000	$ 64,194,000
Less than 12 months, Unrealized Loss	(687,000)	(1,228,000)
12 months or more, Estimated Fair Value	7,644,000	11,952,000
12 months or more, Unrealized Loss	(510,000)	(1,329,000)
Total Estimated Fair Value	74,684,000	76,146,000
Total Unrealized Loss	(1,197,000)	(2,557,000)
Residential Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Total Unrealized Loss	(477,000)
Temporarily Impaired Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	66,929,000	63,728,000
Less than 12 months, Unrealized Loss	(612,000)	(967,000)
12 months or more, Estimated Fair Value	5,901,000	6,314,000
12 months or more, Unrealized Loss	(265,000)	(427,000)
Total Estimated Fair Value	72,830,000	70,042,000
Total Unrealized Loss	(877,000)	(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	1,012,000	1,074,000
Less than 12 months, Unrealized Loss	(2,000)	(10,000)
12 months or more, Estimated Fair Value	115,000	120,000
12 months or more, Unrealized Loss
Total Estimated Fair Value	1,127,000	1,194,000
Total Unrealized Loss	(2,000)	(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	43,087,000	55,678,000
Less than 12 months, Unrealized Loss	(233,000)	(770,000)
12 months or more, Estimated Fair Value	3,081,000
12 months or more, Unrealized Loss	(64,000)
Total Estimated Fair Value	46,168,000	55,678,000
Total Unrealized Loss	(297,000)	(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	3,377,000	5,558,000
Less than 12 months, Unrealized Loss	(87,000)	(158,000)
12 months or more, Estimated Fair Value	1,447,000	4,245,000
12 months or more, Unrealized Loss	(70,000)	(239,000)
Total Estimated Fair Value	4,824,000	9,803,000
Total Unrealized Loss	(157,000)	(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	2,424,000
Less than 12 months, Unrealized Loss	(39,000)
12 months or more, Estimated Fair Value	386,000
12 months or more, Unrealized Loss	(4,000)
Total Estimated Fair Value	2,810,000
Total Unrealized Loss	(43,000)
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	872,000	817,000
12 months or more, Unrealized Loss	(127,000)	(182,000)
Total Estimated Fair Value	872,000	817,000
Total Unrealized Loss	(127,000)	(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	17,029,000	1,418,000
Less than 12 months, Unrealized Loss	(251,000)	(29,000)
12 months or more, Estimated Fair Value		1,132,000
12 months or more, Unrealized Loss		(6,000)
Total Estimated Fair Value	17,029,000	2,550,000
Total Unrealized Loss	(251,000)	(35,000)
Other-Than-Temporarily Impaired Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	111,000	466,000
Less than 12 months, Unrealized Loss	(75,000)	(261,000)
12 months or more, Estimated Fair Value	1,743,000	5,638,000
12 months or more, Unrealized Loss	(245,000)	(902,000)
Total Estimated Fair Value	1,854,000	6,104,000
Total Unrealized Loss	(320,000)	(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	111,000	466,000
Less than 12 months, Unrealized Loss	(75,000)	(261,000)
12 months or more, Estimated Fair Value	1,743,000	5,638,000
12 months or more, Unrealized Loss	(245,000)	(902,000)
Total Estimated Fair Value	1,854,000	6,104,000
Total Unrealized Loss	$ (320,000)	$ (1,163,000)