CREDIT DISCLSOURES - Narrative and Additional Information (Details)	9 Months Ended
Jun. 30, 2017 USD ($) loan	Sep. 30, 2016 USD ($)
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%
Number of Well Collateralized Loans in Collection \| loan	2
Increase finance receivables	$ 49,600,000
Total past due	$ 52,797,000	$ 3,226,000
1-4 Family Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maturity period of loans receivable	30 years
Total past due	$ 430,000	30,000
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	$ 549,000	0
Commercial Operating [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due	$ 0	505,000
Agricultural Operating [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maturity period of loans receivable	1 year
Total past due	$ 97,000	0
Agricultural Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due	$ 39,489,000	0
Consumer Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maturity period of fixed rate loans	5 years
Total past due	$ 10,608,000	53,000
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	$ 1,624,000	2,638,000
Refund Advance Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Typical period of delinquency	180 days
ERO Advance Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Typical period of delinquency	120 days
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 Operating [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maturity period of fixed rate loans	7 years
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
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Increase finance receivables	45,400,000
Total past due	$ 46,385,000	1,018,000
Financing Receivable, Percent Past Due	94.00%
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| 1-4 Family Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due	$ 0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Commercial and Multi-Family Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Commercial Operating [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Agricultural Operating [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Agricultural Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due	36,208,000	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Consumer Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due	9,372,000	53,000
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Premium Finance [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total past due	$ 805,000	$ 965,000

A clause stipulated in the contract of an adjustable-rate mortgage (ARM) that limits the possible increase in the loan's interest rate to a certain amount each year. The cap is usually defined in terms of rate, but the dollar amount of the principal and interest payment can be capped as well. Annual caps are designed to protect borrowers against a sudden and excessive increase in the amount of their monthly payments when rates rise sharply over a short period of time.

No definition available.