LOANS RECEIVABLE, NET AND RELATED ALLOWANCE FOR LOAN LOSSES (Schedule of Average Recorded Investment in Impaired Loans) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	$ 17,277	$ 24,126
One-to four-family residential [Member]
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	8,401	14,257
Commercial real estate
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	4,980	5,560
Construction
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	2,231	3,196
Home equity lines of credit
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	479	1,027
Commercial business
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	$ 1,187	$ 88