Investment Securities (Summary Of Securities With Gross Unrealized Losses And Their Fair Values) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
security
Dec. 31, 2013
security
Available-for-sale Securities and Held-to-maturity Securities    
Number of Securities, Available for Sale 66 108
Number of Securities, Held to Maturity 1  
Amortized cost of securities with unrealized losses, Available for Sale $ 155,056 $ 261,473
Amortized cost of securities with unrealized losses, Held to Maturity 1,718  
Continuous Unrealized Loss Existing for Less Than 12 Months, Available for Sale (169) (6,048)
Continuous Unrealized Loss Existing for Less Than 12 Months, Held to Maturity (10)  
Continuous Unrealized Loss Existing for More Than 12 Months, Available for Sale (1,679) (276)
Fair value of securities with unrealized losses, Available for Sale 153,208 255,149
Fair value of securities with unrealized losses, Held to Maturity 1,708  
Federal Agency Securities [Member]    
Available-for-sale Securities and Held-to-maturity Securities    
Number of Securities, Available for Sale 13 24
Amortized cost of securities with unrealized losses, Available for Sale 60,578 87,921
Continuous Unrealized Loss Existing for Less Than 12 Months, Available for Sale (37) (2,885)
Continuous Unrealized Loss Existing for More Than 12 Months, Available for Sale (735) (4)
Fair value of securities with unrealized losses, Available for Sale 59,806 85,032
Obligations Of State And Political Subdivisions [Member]    
Available-for-sale Securities and Held-to-maturity Securities    
Number of Securities, Available for Sale 8 20
Number of Securities, Held to Maturity 1  
Amortized cost of securities with unrealized losses, Available for Sale 10,076 31,579
Amortized cost of securities with unrealized losses, Held to Maturity 1,718  
Continuous Unrealized Loss Existing for Less Than 12 Months, Available for Sale   (887)
Continuous Unrealized Loss Existing for Less Than 12 Months, Held to Maturity (10)  
Continuous Unrealized Loss Existing for More Than 12 Months, Available for Sale (140) (198)
Fair value of securities with unrealized losses, Available for Sale 9,936 30,494
Fair value of securities with unrealized losses, Held to Maturity 1,708  
Residential Mortgage-Backed Securities [Member]    
Available-for-sale Securities and Held-to-maturity Securities    
Number of Securities, Available for Sale 40 53
Amortized cost of securities with unrealized losses, Available for Sale 65,223 104,667
Continuous Unrealized Loss Existing for Less Than 12 Months, Available for Sale (110) (2,015)
Continuous Unrealized Loss Existing for More Than 12 Months, Available for Sale (740) (74)
Fair value of securities with unrealized losses, Available for Sale 64,373 102,578
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 9,608 9,578
Continuous Unrealized Loss Existing for Less Than 12 Months, Available for Sale (19) (96)
Continuous Unrealized Loss Existing for More Than 12 Months, Available for Sale (41)  
Fair value of securities with unrealized losses, Available for Sale 9,548 9,482
Other Securities [Member]    
Available-for-sale Securities and Held-to-maturity Securities    
Number of Securities, Available for Sale 2 8
Amortized cost of securities with unrealized losses, Available for Sale 9,571 27,728
Continuous Unrealized Loss Existing for Less Than 12 Months, Available for Sale (3) (165)
Continuous Unrealized Loss Existing for More Than 12 Months, Available for Sale (23)  
Fair value of securities with unrealized losses, Available for Sale $ 9,545 $ 27,563