Investment Securities (Summary Of Securities With Gross Unrealized Losses And Their Fair Values) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014 security	Dec. 31, 2013 security
Available-for-sale Securities and Held-to-maturity Securities
Number of Securities, Available for Sale	93	108
Amortized cost of securities with unrealized losses, Available for Sale	$ 228,068	$ 261,473
Continuous Unrealized Loss Existing for Less Than 12 Months, Available for Sale	(3,765)	(6,048)
Continuous Unrealized Loss Existing for More Than 12 Months, Available for Sale	(336)	(276)
Fair value of securities with unrealized losses, Available for Sale	223,967	255,149
Other Securities [Member]
Available-for-sale Securities and Held-to-maturity Securities
Number of Securities, Available for Sale	3	8
Amortized cost of securities with unrealized losses, Available for Sale	14,723	27,728
Continuous Unrealized Loss Existing for Less Than 12 Months, Available for Sale	(45)	(165)
Fair value of securities with unrealized losses, Available for Sale	14,678	27,563
Federal Agency Securities [Member]
Available-for-sale Securities and Held-to-maturity Securities
Number of Securities, Available for Sale	24	24
Amortized cost of securities with unrealized losses, Available for Sale	91,922	87,921
Continuous Unrealized Loss Existing for Less Than 12 Months, Available for Sale	(1,702)	(2,885)
Continuous Unrealized Loss Existing for More Than 12 Months, Available for Sale	(35)	(4)
Fair value of securities with unrealized losses, Available for Sale	90,185	85,032
Obligations Of State And Political Subdivisions [Member]
Available-for-sale Securities and Held-to-maturity Securities
Number of Securities, Available for Sale	14	20
Amortized cost of securities with unrealized losses, Available for Sale	18,821	31,579
Continuous Unrealized Loss Existing for Less Than 12 Months, Available for Sale	(366)	(887)
Continuous Unrealized Loss Existing for More Than 12 Months, Available for Sale	(144)	(198)
Fair value of securities with unrealized losses, Available for Sale	18,311	30,494
Residential Mortgage-Backed Securities [Member]
Available-for-sale Securities and Held-to-maturity Securities
Number of Securities, Available for Sale	49	53
Amortized cost of securities with unrealized losses, Available for Sale	94,772	104,667
Continuous Unrealized Loss Existing for Less Than 12 Months, Available for Sale	(1,604)	(2,015)
Continuous Unrealized Loss Existing for More Than 12 Months, Available for Sale	(157)	(74)
Fair value of securities with unrealized losses, Available for Sale	93,011	102,578
Asset-Backed Securities [Member]
Available-for-sale Securities and Held-to-maturity Securities
Number of Securities, Available for Sale	3	3
Amortized cost of securities with unrealized losses, Available for Sale	7,830	9,578
Continuous Unrealized Loss Existing for Less Than 12 Months, Available for Sale	(48)	(96)
Fair value of securities with unrealized losses, Available for Sale	$ 7,782	$ 9,482