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LOAN PORTFOLIO COMPOSITION - Loans Modified as Troubled Debt Restructurings (Details 7) - Loans Receivable
3 Months Ended 6 Months Ended
Jun. 30, 2015
USD ($)
Loan
Jun. 30, 2014
USD ($)
Loan
Jun. 30, 2015
USD ($)
Loan
Jun. 30, 2014
USD ($)
Loan
Accounts Notes And Loans Receivable [Line Items]        
Troubled debt restructurings, number of modification | Loan 2   4 1
Troubled debt restructurings, recorded investment $ 69,147   $ 174,520 $ 18,489
Real estate loans | One-to-four family residential        
Accounts Notes And Loans Receivable [Line Items]        
Troubled debt restructurings, number of modification | Loan     1  
Troubled debt restructurings, recorded investment     $ 103,434  
Real estate loans | Commercial real estate        
Accounts Notes And Loans Receivable [Line Items]        
Troubled debt restructurings, number of modification | Loan        
Troubled debt restructurings, recorded investment        
Real estate loans | Agricultural real estate        
Accounts Notes And Loans Receivable [Line Items]        
Troubled debt restructurings, number of modification | Loan        
Troubled debt restructurings, recorded investment        
Real estate loans | Home equity        
Accounts Notes And Loans Receivable [Line Items]        
Troubled debt restructurings, number of modification | Loan 1   1  
Troubled debt restructurings, recorded investment $ 2,497   $ 2,497  
Commercial loans        
Accounts Notes And Loans Receivable [Line Items]        
Troubled debt restructurings, number of modification | Loan        
Troubled debt restructurings, recorded investment        
Agricultural loans        
Accounts Notes And Loans Receivable [Line Items]        
Troubled debt restructurings, number of modification | Loan        
Troubled debt restructurings, recorded investment        
Consumer loans        
Accounts Notes And Loans Receivable [Line Items]        
Troubled debt restructurings, number of modification | Loan 1   2 1
Troubled debt restructurings, recorded investment $ 66,650   $ 68,589 $ 18,489