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Investment Securities (Investments' Gross Unrealized Losses And Fair Value) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]    
Securities available for sale, Less than 12 months, Fair Value $ 154,248 $ 46,936
Securities available for sale, Less than 12 months, Unrealized Losses 1,551 327
Securities available for sale, 12 months or longer, Fair Value 4,014 4,140
Securities available for sale, 12 months or longer, Unrealized Losses 8 4
Securities available for sale, Fair Value, Total 158,262 51,076
Securities available for sale, Unrealized Losses, Total 1,559 331
U.S. Government Agencies And Government Sponsored Enterprises [Member]
   
Schedule of Available-for-sale Securities [Line Items]    
Securities available for sale, Less than 12 months, Fair Value 27,857 13,265
Securities available for sale, Less than 12 months, Unrealized Losses 95 67
Securities available for sale, 12 months or longer, Fair Value 2,912 2,967
Securities available for sale, 12 months or longer, Unrealized Losses 6 2
Securities available for sale, Fair Value, Total 30,769 16,232
Securities available for sale, Unrealized Losses, Total 101 69
State And Political Subdivisions [Member]
   
Schedule of Available-for-sale Securities [Line Items]    
Securities available for sale, Less than 12 months, Fair Value 26,532 8,471
Securities available for sale, Less than 12 months, Unrealized Losses 262 72
Securities available for sale, Fair Value, Total 26,532 8,471
Securities available for sale, Unrealized Losses, Total 262 72
Mortgage-Backed Securities [Member]
   
Schedule of Available-for-sale Securities [Line Items]    
Securities available for sale, Less than 12 months, Fair Value 99,859 25,200
Securities available for sale, Less than 12 months, Unrealized Losses 1,194 188
Securities available for sale, 12 months or longer, Fair Value 1,102 1,173
Securities available for sale, 12 months or longer, Unrealized Losses 2 2
Securities available for sale, Fair Value, Total 100,961 26,373
Securities available for sale, Unrealized Losses, Total 1,196 190
Mortgage-Backed Securities [Member] | Federal National Mortgage Association [Member]
   
Schedule of Available-for-sale Securities [Line Items]    
Securities available for sale, Less than 12 months, Fair Value 37,063 25,200
Securities available for sale, Less than 12 months, Unrealized Losses 265 188
Securities available for sale, Fair Value, Total 37,063 25,200
Securities available for sale, Unrealized Losses, Total 265 188
Collateralized Mortgage Obligations [Member]
   
Schedule of Available-for-sale Securities [Line Items]    
Securities available for sale, Less than 12 months, Fair Value 62,796  
Securities available for sale, Less than 12 months, Unrealized Losses 929  
Securities available for sale, 12 months or longer, Fair Value 1,102 1,173
Securities available for sale, 12 months or longer, Unrealized Losses 2 2
Securities available for sale, Fair Value, Total 63,898 1,173
Securities available for sale, Unrealized Losses, Total 931 2
Collateralized Mortgage Obligations [Member] | Federal National Mortgage Association [Member]
   
Schedule of Available-for-sale Securities [Line Items]    
Securities available for sale, Less than 12 months, Fair Value 12,693  
Securities available for sale, Less than 12 months, Unrealized Losses 140  
Securities available for sale, 12 months or longer, Fair Value 1,102 1,173
Securities available for sale, 12 months or longer, Unrealized Losses 2 2
Securities available for sale, Fair Value, Total 13,795 1,173
Securities available for sale, Unrealized Losses, Total 142 2
Collateralized Mortgage Obligations [Member] | Federal Home Loan Mortgage Corporation [Member]
   
Schedule of Available-for-sale Securities [Line Items]    
Securities available for sale, Less than 12 months, Fair Value 46,770  
Securities available for sale, Less than 12 months, Unrealized Losses 747  
Securities available for sale, Fair Value, Total 46,770  
Securities available for sale, Unrealized Losses, Total 747  
Collateralized Mortgage Obligations [Member] | Government National Mortgage Association [Member]
   
Schedule of Available-for-sale Securities [Line Items]    
Securities available for sale, Less than 12 months, Fair Value 3,333  
Securities available for sale, Less than 12 months, Unrealized Losses 42  
Securities available for sale, Fair Value, Total 3,333  
Securities available for sale, Unrealized Losses, Total $ 42