LOANS RECEIVABLE, NET AND RELATED ALLOWANCE FOR LOAN LOSSES (Schedule of Average Recorded Investment in Impaired Loans) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	$ 14,358	$ 23,310	$ 15,817	$ 23,718
One-to four-family residential [Member]
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	4,502	13,585	6,451	13,921
Commercial real estate
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	5,563	5,271	5,271	5,415
Construction
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	1,692	2,574	1,961	2,885
Home equity lines of credit
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	841	1,144	660	1,085
Commercial business
Financing Receivable, Impaired [Line Items]
Average investment in impaired loans	$ 1,762	$ 738	$ 1,474	$ 413