Investment Securities (Schedule Of Gross Unrealized Losses On Investment Securities) (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, Fair Value	$ 10,806	$ 70,349
Less Than 12 Months, Unrealized Loses	59	1,169
Total, Fair Value	10,806	70,349
Total, Unrealized Losses	59	1,169
U.S Treasury And Government Sponsored Entities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value		35,873
Less Than 12 Months, Unrealized Loses		50
Total, Fair Value		35,873
Total, Unrealized Losses		50
Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value	1,265
Less Than 12 Months, Unrealized Loses	9
Total, Fair Value	1,265
Total, Unrealized Losses	9
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value	9,541	34,476
Less Than 12 Months, Unrealized Loses	50	1,119
Total, Fair Value	9,541	34,476
Total, Unrealized Losses	$ 50	$ 1,119