Investment Securities (Summary Of Securities With Gross Unrealized Losses And Their Fair Values) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013 security	Dec. 31, 2012 security
Available-for-sale Securities and Held-to-maturity Securities
Number of Securities, Available for Sale	114	41
Amortized cost of securities with unrealized losses, Available for Sale	$ 227,227	$ 74,925
Continuous Unrealized Loss Existing for Less Than 12 Months, Available for Sale	(4,049)	(513)
Continuous Unrealized Loss Existing for More Than 12 Months, Available for Sale	(517)	(15)
Fair value of securities with unrealized losses, Available for Sale	222,661	74,397
Federal Agency Securities [Member]
Available-for-sale Securities and Held-to-maturity Securities
Number of Securities, Available for Sale	31	5
Amortized cost of securities with unrealized losses, Available for Sale	79,468	9,887
Continuous Unrealized Loss Existing for Less Than 12 Months, Available for Sale	(2,126)	(19)
Fair value of securities with unrealized losses, Available for Sale	77,342	9,868
Obligations Of State And Political Subdivisions [Member]
Available-for-sale Securities and Held-to-maturity Securities
Number of Securities, Available for Sale	21	9
Amortized cost of securities with unrealized losses, Available for Sale	28,621	10,457
Continuous Unrealized Loss Existing for Less Than 12 Months, Available for Sale	(611)	(83)
Continuous Unrealized Loss Existing for More Than 12 Months, Available for Sale	(160)
Fair value of securities with unrealized losses, Available for Sale	27,850	10,374
Residential Mortgage-Backed Securities [Member]
Available-for-sale Securities and Held-to-maturity Securities
Number of Securities, Available for Sale	52	23
Amortized cost of securities with unrealized losses, Available for Sale	89,562	46,787
Continuous Unrealized Loss Existing for Less Than 12 Months, Available for Sale	(1,137)	(288)
Continuous Unrealized Loss Existing for More Than 12 Months, Available for Sale	(357)	(15)
Fair value of securities with unrealized losses, Available for Sale	88,068	46,484
Asset-Backed Securities [Member]
Available-for-sale Securities and Held-to-maturity Securities
Number of Securities, Available for Sale	5	4
Amortized cost of securities with unrealized losses, Available for Sale	9,571	7,794
Continuous Unrealized Loss Existing for Less Than 12 Months, Available for Sale	(77)	(123)
Fair value of securities with unrealized losses, Available for Sale	$ 9,494	$ 7,671