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Securities Continuous Unrealized Loss (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value $ 31,481 $ 23,706
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses 115 141
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 356 1,575
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses 144 410
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 31,837 25,281
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses 259 551
US Government and Government Agencies and Authorities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 9,997 5,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses 3 1
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 0 0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses 0 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 9,997 5,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses 3 1
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 18,877 17,020
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses 81 129
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 0 0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses 0 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 18,877 17,020
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses 81 129
US States and Political Subdivisions Debt Securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 2,607 1,686
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses 31 11
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 0 718
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses 0 37
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 2,607 2,404
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses 31 48
Trust Preferred Securities Pooled [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 0 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses 0 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 0 100
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses 0 130
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 0 100
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses 0 130
Trust Preferred Securities Individual Issuer [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 0 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses 0 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 356 757
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses 144 243
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 356 757
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses $ 144 $ 243