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Loans Receivable and Allowance for Loan Losses (Troubled Debt Restructuring) (Details) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2012
Dec. 31, 2011
Financing Receivable, Modifications [Line Items]    
Financing Receivable, Modifications, Nature and Extent of Transaction  
Loans identified as troubled debt restructurings 2  
Subsequent defaulted restructurings 0  
Accrual Status $ 4,117 $ 5,008
Total Modifications 4,117 5,008
Commercial real estate [Member]
   
Financing Receivable, Modifications [Line Items]    
Accrual Status 1,837 2,383
Total Modifications 1,837 2,383
Construction and land development [Member]
   
Financing Receivable, Modifications [Line Items]    
Accrual Status 2,280 2,625
Total Modifications $ 2,280 $ 2,625