Securities Available For Sale (Schedule Of Fair Value Of Securities With Continuous Unrealized Losses) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Schedule of Available for sale Securities [Line Items]
Securities with continuous unrealized losses, Less than 12 months, Estimated Fair Value	$ 46,607	$ 28,120
Securities with continuous unrealized losses, Less than 12 months, Number of Investments	70,000	35,000
Securities with continuous unrealized losses, Less than 12 months, Unrealized Losses	457	393
Securities with continuous unrealized losses, 12 months or longer, Estimated Fair Value	12,417	21,656
Securities with continuous unrealized losses, 12 months or longer, Number of Investments	62,000	91,000
Securities with continuous unrealized losses, 12 months or longer, Unrealized Losses	1,809	3,707
Securities with continuous unrealized losses, Estimated Fair Value	59,024	49,776
Securities with continuous unrealized losses, Number of Investments	132,000	126,000
Securities with continuous unrealized losses, Unrealized Losses	2,266	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	24,431	15,870
Securities with continuous unrealized losses, Less than 12 months, Number of Investments	25,000	13,000
Securities with continuous unrealized losses, Less than 12 months, Unrealized Losses	133	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	24,431	15,890
Securities with continuous unrealized losses, Number of Investments	25,000	14,000
Securities with continuous unrealized losses, Unrealized Losses	133	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	2,575	9,934
Securities with continuous unrealized losses, Less than 12 months, Number of Investments	4,000	10,000
Securities with continuous unrealized losses, Less than 12 months, Unrealized Losses	16	22
Securities with continuous unrealized losses, 12 months or longer, Estimated Fair Value	130	59
Securities with continuous unrealized losses, 12 months or longer, Number of Investments	3,000	3,000
Securities with continuous unrealized losses, 12 months or longer, Unrealized Losses	1	1
Securities with continuous unrealized losses, Estimated Fair Value	2,705	9,993
Securities with continuous unrealized losses, Number of Investments	7,000	13,000
Securities with continuous unrealized losses, Unrealized Losses	17	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	1,317	1,613
Securities with continuous unrealized losses, Less than 12 months, Number of Investments	5,000	8,000
Securities with continuous unrealized losses, Less than 12 months, Unrealized Losses	26	219
Securities with continuous unrealized losses, 12 months or longer, Estimated Fair Value	3,821	6,807
Securities with continuous unrealized losses, 12 months or longer, Number of Investments	19,000	26,000
Securities with continuous unrealized losses, 12 months or longer, Unrealized Losses	700	1,273
Securities with continuous unrealized losses, Estimated Fair Value	5,138	8,420
Securities with continuous unrealized losses, Number of Investments	24,000	34,000
Securities with continuous unrealized losses, Unrealized Losses	726	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	18,284	703
Securities with continuous unrealized losses, Less than 12 months, Number of Investments	36,000	4,000
Securities with continuous unrealized losses, Less than 12 months, Unrealized Losses	282	25
Securities with continuous unrealized losses, 12 months or longer, Estimated Fair Value	8,466	14,770
Securities with continuous unrealized losses, 12 months or longer, Number of Investments	40,000	61,000
Securities with continuous unrealized losses, 12 months or longer, Unrealized Losses	1,108	2,433
Securities with continuous unrealized losses, Estimated Fair Value	26,750	15,473
Securities with continuous unrealized losses, Number of Investments	76,000	65,000
Securities with continuous unrealized losses, Unrealized Losses	$ 1,390	$ 2,458