Securities Available For Sale (Schedule Of Fair Value Of Securities With Continuous Unrealized Losses) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012 security	Dec. 31, 2011 security
Schedule of Available for sale Securities [Line Items]
Securities with continuous unrealized losses, Less than 12 months, Estimated Fair Value	$ 33,077	$ 28,120
Securities with continuous unrealized losses, Less than 12 months, Number of Investments	39,000	35,000
Securities with continuous unrealized losses, Less than 12 months, Unrealized Losses	470	393
Securities with continuous unrealized losses, 12 months or longer, Estimated Fair Value	9,686	21,656
Securities with continuous unrealized losses, 12 months or longer, Number of Investments	42,000	91,000
Securities with continuous unrealized losses, 12 months or longer, Unrealized Losses	869	3,707
Securities with continuous unrealized losses, Estimated Fair Value	42,763	49,776
Securities with continuous unrealized losses, Number of Investments	81,000	126,000
Securities with continuous unrealized losses, Unrealized Losses	1,339	4,100
US Government-Sponsored Enterprises [Member]
Schedule of Available for sale Securities [Line Items]
Securities with continuous unrealized losses, Less than 12 months, Estimated Fair Value	17,306	15,870
Securities with continuous unrealized losses, Less than 12 months, Number of Investments	16,000	13,000
Securities with continuous unrealized losses, Less than 12 months, Unrealized Losses	200	127
Securities with continuous unrealized losses, 12 months or longer, Estimated Fair Value		20
Securities with continuous unrealized losses, 12 months or longer, Number of Investments		1,000
Securities with continuous unrealized losses, Estimated Fair Value	17,306	15,890
Securities with continuous unrealized losses, Number of Investments	16,000	14,000
Securities with continuous unrealized losses, Unrealized Losses	200	127
US Government Agency [Member]
Schedule of Available for sale Securities [Line Items]
Securities with continuous unrealized losses, Less than 12 months, Estimated Fair Value	8,409	9,934
Securities with continuous unrealized losses, Less than 12 months, Number of Investments	10,000	10,000
Securities with continuous unrealized losses, Less than 12 months, Unrealized Losses	150	22
Securities with continuous unrealized losses, 12 months or longer, Estimated Fair Value	6	59
Securities with continuous unrealized losses, 12 months or longer, Number of Investments	1,000	3,000
Securities with continuous unrealized losses, 12 months or longer, Unrealized Losses		1
Securities with continuous unrealized losses, Estimated Fair Value	8,415	9,993
Securities with continuous unrealized losses, Number of Investments	11,000	13,000
Securities with continuous unrealized losses, Unrealized Losses	150	23
Private Label Mortgage-Backed Securities [Member]
Schedule of Available for sale Securities [Line Items]
Securities with continuous unrealized losses, Less than 12 months, Estimated Fair Value	1,122	1,613
Securities with continuous unrealized losses, Less than 12 months, Number of Investments	3,000	8,000
Securities with continuous unrealized losses, Less than 12 months, Unrealized Losses	35	219
Securities with continuous unrealized losses, 12 months or longer, Estimated Fair Value	3,717	6,807
Securities with continuous unrealized losses, 12 months or longer, Number of Investments	18,000	26,000
Securities with continuous unrealized losses, 12 months or longer, Unrealized Losses	522	1,273
Securities with continuous unrealized losses, Estimated Fair Value	4,839	8,420
Securities with continuous unrealized losses, Number of Investments	21,000	34,000
Securities with continuous unrealized losses, Unrealized Losses	557	1,492
Obligations Of States And Political Subdivisions Thereof [Member]
Schedule of Available for sale Securities [Line Items]
Securities with continuous unrealized losses, Less than 12 months, Estimated Fair Value	6,240	703
Securities with continuous unrealized losses, Less than 12 months, Number of Investments	10,000	4,000
Securities with continuous unrealized losses, Less than 12 months, Unrealized Losses	85	25
Securities with continuous unrealized losses, 12 months or longer, Estimated Fair Value	5,963	14,770
Securities with continuous unrealized losses, 12 months or longer, Number of Investments	23,000	61,000
Securities with continuous unrealized losses, 12 months or longer, Unrealized Losses	347	2,433
Securities with continuous unrealized losses, Estimated Fair Value	12,203	15,473
Securities with continuous unrealized losses, Number of Investments	33,000	65,000
Securities with continuous unrealized losses, Unrealized Losses	$ 432	$ 2,458