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CREDIT DISCLSOURES - Narrative and Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Percentage of specific allowance for losses 100.00%  
Maturity period of fixed rate loans 30 years  
Annual cap of ARM loans 2.00%  
Lifetime cap of ARM loans 6.00%  
Total past due $ 8,937 $ 3,226
1-4 Family Real Estate [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Maturity period of loans receivable 30 years  
Total past due $ 480 30
Commercial and Multi-Family Real Estate [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loan to value ratio 80.00%  
Maturity period of fixed rate loans 20 years  
Total past due $ 3,195 0
Commercial Operating [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total past due $ 0 505
Agricultural Operating [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Maturity period of loans receivable 1 year  
Maturity period of fixed rate loans 7 years  
Total past due $ 0 0
Agricultural Real Estate [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total past due $ 2,206 0
Consumer Loans [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Maturity period of fixed rate loans 5 years  
Total past due $ 338 53
Premium Finance [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Period of delay or shortfall in payments after which a loan is evaluated for impairment 210 days  
Typical period of delinquency 210 days  
Total past due $ 2,718 $ 2,638
Non-Premium Finance Loans [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Period of delay or shortfall in payments after which a loan is evaluated for impairment 90 days  
Typical period of delinquency 90 days  
Maximum [Member] | 1-4 Family Real Estate [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loan to value ratio 100.00%  
Exposure of the entity expressed in loan to value ratio 80.00%  
Maximum [Member] | Commercial and Multi-Family Real Estate [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Maturity period of loans receivable 1 year  
Percentage value for securing the loan 80.00%  
Maximum [Member] | Commercial Operating [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Maturity period of loans receivable 1 year  
Maximum [Member] | Agricultural Real Estate [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Maturity period of fixed rate loans 10 years  
Period of amortization, loans 25 years  
Percentage value for securing the loan 75.00%  
Maximum [Member] | Consumer Loans [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Percentage value for securing the loan 90.00%  
Maximum [Member] | Automobile Loan [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Maturity period of loans receivable 60 months  
Percentage value for securing the loan 80.00%  
Maximum [Member] | Premium Finance [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Percentage of down payment 25.00%  
Period of finance 10 months  
Period of conversion of collateral into cash 210 days  
Minimum [Member] | Agricultural Real Estate [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Maturity period of fixed rate loans 5 years  
Period of amortization, loans 20 years  
Minimum [Member] | Premium Finance [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Percentage of down payment 20.00%  
Period of finance 9 months  
Period of conversion of collateral into cash 60 days  
Typical period of delinquency 90 days  
Financing Receivables, Equal to Greater than 210 Days Past Due [Member] | Premium Finance [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total past due $ 0