FAIR VALUE MEASUREMENTS (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Sep. 30, 2013
Debt securities [Abstract]
Securities available for sale	$ 1,033,603	$ 881,193
Level 1 [Member]
Debt securities [Abstract]
Securities available for sale	0	0
Level 2 [Member]
Debt securities [Abstract]
Securities available for sale	1,033,603	881,193
Level 3 [Member]
Debt securities [Abstract]
Securities available for sale	0	0
Recurring [Member] | Available For Sale [Member]
Debt securities [Abstract]
Trust preferred and corporate securities	52,445	48,784
Agency and instrumentality securities	0
Agency securities		0
Small Business Administration securities	53,431	10,581
Obligations of states and political subdivisions	0	1,727
Non-bank qualified obligations of states and political subdivisions	310,741	238,729
Common equities and mutual funds	814
Mortgage-backed securities	616,172	581,372
Securities available for sale	1,033,603	881,193
Recurring [Member] | Held to Maturity [Member]
Debt securities [Abstract]
Trust preferred and corporate securities	0	0
Agency and instrumentality securities	9,697
Agency securities		9,613
Small Business Administration securities	0	0
Obligations of states and political subdivisions	17,785	18,342
Non-bank qualified obligations of states and political subdivisions	180,508	169,462
Common equities and mutual funds	0
Mortgage-backed securities	70,184	73,101
Securities available for sale	278,174	270,518
Recurring [Member] | Level 1 [Member] | Available For Sale [Member]
Debt securities [Abstract]
Trust preferred and corporate securities	0	0
Agency and instrumentality securities	0
Agency securities		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
Common equities and mutual funds	0
Mortgage-backed securities	0	0
Securities available for sale	0	0
Recurring [Member] | Level 1 [Member] | Held to Maturity [Member]
Debt securities [Abstract]
Trust preferred and corporate securities	0	0
Agency and instrumentality securities	0
Agency securities		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
Common equities and mutual funds	0
Mortgage-backed securities	0	0
Securities available for sale	0	0
Recurring [Member] | Level 2 [Member] | Available For Sale [Member]
Debt securities [Abstract]
Trust preferred and corporate securities	52,445	48,784
Agency and instrumentality securities	0
Agency securities		0
Small Business Administration securities	53,431	10,581
Obligations of states and political subdivisions	0	1,727
Non-bank qualified obligations of states and political subdivisions	310,741	238,729
Common equities and mutual funds	814
Mortgage-backed securities	616,172	581,372
Securities available for sale	1,033,603	881,193
Recurring [Member] | Level 2 [Member] | Held to Maturity [Member]
Debt securities [Abstract]
Trust preferred and corporate securities	0	0
Agency and instrumentality securities	9,697
Agency securities		9,613
Small Business Administration securities	0	0
Obligations of states and political subdivisions	17,785	18,342
Non-bank qualified obligations of states and political subdivisions	180,508	169,462
Common equities and mutual funds	0
Mortgage-backed securities	70,184	73,101
Securities available for sale	278,174	270,518
Recurring [Member] | Level 3 [Member] | Available For Sale [Member]
Debt securities [Abstract]
Trust preferred and corporate securities	0	0
Agency and instrumentality securities	0
Agency securities		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
Common equities and mutual funds	0
Mortgage-backed securities	0	0
Securities available for sale	0	0
Recurring [Member] | Level 3 [Member] | Held to Maturity [Member]
Debt securities [Abstract]
Trust preferred and corporate securities	0	0
Agency and instrumentality securities	0
Agency securities		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
Common equities and mutual funds	0
Mortgage-backed securities	0	0
Securities available for sale	0	0
Nonrecurring [Member]
Fair value of assets measured on non-recurring basis [Abstract]
One to four family residential mortgage loans	256	257
Commercial and multi-family real estate loans	929	1,810
Total Impaired Loans	1,185	2,067
Foreclosed Assets, net	116	116
Total	1,301	2,183
Nonrecurring [Member] | Level 1 [Member]
Fair value of assets measured on non-recurring basis [Abstract]
One to four family residential mortgage loans	0	0
Commercial and multi-family real estate loans	0	0
Total Impaired Loans	0	0
Foreclosed Assets, net	0	0
Total	0	0
Nonrecurring [Member] | Level 2 [Member]
Fair value of assets measured on non-recurring basis [Abstract]
One to four family residential mortgage loans	0	0
Commercial and multi-family real estate loans	0	0
Total Impaired Loans	0	0
Foreclosed Assets, net	0	0
Total	0	0
Nonrecurring [Member] | Level 3 [Member]
Fair value of assets measured on non-recurring basis [Abstract]
One to four family residential mortgage loans	256	257
Commercial and multi-family real estate loans	929	1,810
Total Impaired Loans	1,185	2,067
Foreclosed Assets, net	116	116
Total	$ 1,301	$ 2,183