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FAIR VALUE MEASUREMENTS (Details) - USD ($) $ in Thousands | Jun. 30, 2015 | Sep. 30, 2014
--- | --- | ---
Available-for-sale Securities [Abstract] |  |
Total debt securities | $ 596,976 | $ 657,870
Total available for sale securities | 1,159,786 | 1,140,216
Held-to-maturity Securities [Abstract] |  |
Total held to maturity securities | 326,989 | 279,312
Level 1 [Member] |  |
Available-for-sale Securities [Abstract] |  |
Total available for sale securities | 966 | 825
Held-to-maturity Securities [Abstract] |  |
Total held to maturity securities | 0 | 0
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 0 | 0
Level 1 [Member] | One to Four Family Residential Mortgage Loans [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 0 | 0
Level 1 [Member] | Commercial and Multi-family Real Estate Loans [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 0 | 0
Level 1 [Member] | Agricultural Operating Loans [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 0 | 0
Level 1 [Member] | Consumer Loans [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 0 | 0
Level 1 [Member] | Commercial Operating Loans [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 0 | 0
Level 2 [Member] |  |
Available-for-sale Securities [Abstract] |  |
Total available for sale securities | 1,158,820 | 1,139,391
Held-to-maturity Securities [Abstract] |  |
Total held to maturity securities | 326,989 | 279,312
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 0 | 0
Level 2 [Member] | One to Four Family Residential Mortgage Loans [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 0 | 0
Level 2 [Member] | Commercial and Multi-family Real Estate Loans [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 0 | 0
Level 2 [Member] | Agricultural Operating Loans [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 0 | 0
Level 2 [Member] | Consumer Loans [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 0 | 0
Level 2 [Member] | Commercial Operating Loans [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 0 | 0
Level 3 [Member] |  |
Available-for-sale Securities [Abstract] |  |
Total available for sale securities | 0 | 0
Held-to-maturity Securities [Abstract] |  |
Total held to maturity securities | 0 | 0
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 656,960 | 504,388
Level 3 [Member] | Total Impaired Loans [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 4,391 | 1,152
Level 3 [Member] | One to Four Family Residential Mortgage Loans [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 117,325 | 111,254
Level 3 [Member] | Commercial and Multi-family Real Estate Loans [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 281,441 | 234,845
Level 3 [Member] | Agricultural Operating Loans [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 39,191 | 44,398
Level 3 [Member] | Consumer Loans [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 34,131 | 29,580
Level 3 [Member] | Commercial Operating Loans [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 24,927 | 25,660
Level 3 [Member] | Foreclosed Assets, Net [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 54 | 15
Recurring [Member] |  |
Available-for-sale Securities [Abstract] |  |
Trust preferred and corporate securities | 16,992 | 46,929
Small business administration securities | 37,150 | 67,012
Obligations of states and political subdivisions | 0 | 0
Non-bank qualified obligations of states and political subdivisions | 507,702 | 367,580
Mortgage-backed securities | 596,976 | 657,870
Total debt securities | 1,158,820 | 1,139,391
Common equities and mutual funds | 966 | 825
Total available for sale securities | 1,159,786 | 1,140,216
Held-to-maturity Securities [Abstract] |  |
Trust preferred and corporate securities | 0 | 0
Small business administration securities | 0 | 0
Obligations of states and political subdivisions | 18,876 | 18,980
Non-bank qualified obligations of states and political subdivisions | 240,693 | 192,160
Mortgage-backed securities | 67,420 | 68,172
Total debt securities | 326,989 | 279,312
Common equities and mutual funds | 0 | 0
Total held to maturity securities | 326,989 | 279,312
Recurring [Member] | Level 1 [Member] |  |
Available-for-sale Securities [Abstract] |  |
Trust preferred and corporate securities | 0 | 0
Small business administration securities | 0 | 0
Obligations of states and political subdivisions | 0 | 0
Non-bank qualified obligations of states and political subdivisions | 0 | 0
Mortgage-backed securities | 0 | 0
Total debt securities | 0 | 0
Common equities and mutual funds | 966 | 825
Total available for sale securities | 966 | 825
Held-to-maturity Securities [Abstract] |  |
Trust preferred and corporate securities | 0 | 0
Small business administration securities | 0 | 0
Obligations of states and political subdivisions | 0 | 0
Non-bank qualified obligations of states and political subdivisions | 0 | 0
Mortgage-backed securities | 0 | 0
Total debt securities | 0 | 0
Common equities and mutual funds | 0 | 0
Total held to maturity securities | 0 | 0
Recurring [Member] | Level 2 [Member] |  |
Available-for-sale Securities [Abstract] |  |
Trust preferred and corporate securities | 16,992 | 46,929
Small business administration securities | 37,150 | 67,012
Obligations of states and political subdivisions | 0 | 0
Non-bank qualified obligations of states and political subdivisions | 507,702 | 367,580
Mortgage-backed securities | 596,976 | 657,870
Total debt securities | 1,158,820 | 1,139,391
Common equities and mutual funds | 0 | 0
Total available for sale securities | 1,158,820 | 1,139,391
Held-to-maturity Securities [Abstract] |  |
Trust preferred and corporate securities | 0 | 0
Small business administration securities | 0 | 0
Obligations of states and political subdivisions | 18,876 | 18,980
Non-bank qualified obligations of states and political subdivisions | 240,693 | 192,160
Mortgage-backed securities | 67,420 | 68,172
Total debt securities | 326,989 | 279,312
Common equities and mutual funds | 0 | 0
Total held to maturity securities | 326,989 | 279,312
Recurring [Member] | Level 3 [Member] |  |
Available-for-sale Securities [Abstract] |  |
Trust preferred and corporate securities | 0 | 0
Small business administration securities | 0 | 0
Obligations of states and political subdivisions | 0 | 0
Non-bank qualified obligations of states and political subdivisions | 0 | 0
Mortgage-backed securities | 0 | 0
Total debt securities | 0 | 0
Common equities and mutual funds | 0 | 0
Total available for sale securities | 0 | 0
Held-to-maturity Securities [Abstract] |  |
Trust preferred and corporate securities | 0 | 0
Small business administration securities | 0 | 0
Obligations of states and political subdivisions | 0 | 0
Non-bank qualified obligations of states and political subdivisions | 0 | 0
Mortgage-backed securities | 0 | 0
Total debt securities | 0 | 0
Common equities and mutual funds | 0 | 0
Total held to maturity securities | 0 | 0
Nonrecurring [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 4,445 | 1,167
Nonrecurring [Member] | Total Impaired Loans [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 4,391 | 1,152
Nonrecurring [Member] | One to Four Family Residential Mortgage Loans [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 0 | 222
Nonrecurring [Member] | Commercial and Multi-family Real Estate Loans [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 683 | 930
Nonrecurring [Member] | Agricultural Operating Loans [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 3,708 |
Nonrecurring [Member] | Foreclosed Assets, Net [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 54 | 15
Nonrecurring [Member] | Level 1 [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 0 | 0
Nonrecurring [Member] | Level 1 [Member] | Total Impaired Loans [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 0 | 0
Nonrecurring [Member] | Level 1 [Member] | One to Four Family Residential Mortgage Loans [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 0 | 0
Nonrecurring [Member] | Level 1 [Member] | Commercial and Multi-family Real Estate Loans [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 0 | 0
Nonrecurring [Member] | Level 1 [Member] | Agricultural Operating Loans [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 0 |
Nonrecurring [Member] | Level 1 [Member] | Foreclosed Assets, Net [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 0 | 0
Nonrecurring [Member] | Level 2 [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 0 | 0
Nonrecurring [Member] | Level 2 [Member] | Total Impaired Loans [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 0 | 0
Nonrecurring [Member] | Level 2 [Member] | One to Four Family Residential Mortgage Loans [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 0 | 0
Nonrecurring [Member] | Level 2 [Member] | Commercial and Multi-family Real Estate Loans [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 0 | 0
Nonrecurring [Member] | Level 2 [Member] | Agricultural Operating Loans [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 0 |
Nonrecurring [Member] | Level 2 [Member] | Foreclosed Assets, Net [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 0 | 0
Nonrecurring [Member] | Level 3 [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 4,445 | 1,167
Nonrecurring [Member] | Level 3 [Member] | Total Impaired Loans [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 4,391 | 1,152
Nonrecurring [Member] | Level 3 [Member] | One to Four Family Residential Mortgage Loans [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 0 | 222
Nonrecurring [Member] | Level 3 [Member] | Commercial and Multi-family Real Estate Loans [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 683 | 930
Nonrecurring [Member] | Level 3 [Member] | Agricultural Operating Loans [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | 3,708 |
Nonrecurring [Member] | Level 3 [Member] | Foreclosed Assets, Net [Member] |  |
Fair value of assets measured on non-recurring basis [Abstract] |  |
Fair value | $ 54 | $ 15

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