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Investment Securities (Summary Of Amortized Cost And Fair Values Of Investment Securities) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Held To Maturity Securities And Available For Sale Securities [Line Items]    
Amortized Cost, Held to Maturity $ 12,797 $ 15,252
Gross Unrealized Gains, Held to Maturity 862 633
Fair Value, Held to Maturity 13,659 15,885
Amortized Cost, Available for Sale 358,317 253,869
Gross Unrealized Gains, Available for Sale 6,526 6,379
Gross Unrealized Losses, Available for Sale (528) (148)
Fair Value, Available for Sale 364,315 260,100
Federal Agency Securities [Member]
   
Held To Maturity Securities And Available For Sale Securities [Line Items]    
Amortized Cost, Available for Sale 114,159 64,524
Gross Unrealized Gains, Available for Sale 1,474 1,051
Gross Unrealized Losses, Available for Sale (19) (22)
Fair Value, Available for Sale 115,614 65,553
Obligations Of State And Political Subdivisions [Member]
   
Held To Maturity Securities And Available For Sale Securities [Line Items]    
Amortized Cost, Held to Maturity 12,797 15,252
Gross Unrealized Gains, Held to Maturity 862 633
Fair Value, Held to Maturity 13,659 15,885
Amortized Cost, Available for Sale 34,754 10,926
Gross Unrealized Gains, Available for Sale 887 196
Gross Unrealized Losses, Available for Sale (83) (19)
Fair Value, Available for Sale 35,558 11,103
Residential Mortgage-Backed Securities [Member]
   
Held To Maturity Securities And Available For Sale Securities [Line Items]    
Amortized Cost, Available for Sale 200,310 177,365
Gross Unrealized Gains, Available for Sale 3,668 4,889
Gross Unrealized Losses, Available for Sale (303) (107)
Fair Value, Available for Sale 203,675 182,147
Asset-Backed Securities [Member]
   
Held To Maturity Securities And Available For Sale Securities [Line Items]    
Amortized Cost, Available for Sale 7,794  
Gross Unrealized Losses, Available for Sale (123)  
Fair Value, Available for Sale 7,671  
Equity Securities [Member]
   
Held To Maturity Securities And Available For Sale Securities [Line Items]    
Amortized Cost, Available for Sale 1,300 1,054
Gross Unrealized Gains, Available for Sale 497 243
Fair Value, Available for Sale $ 1,797 $ 1,297