LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES (Details 3) (USD $)	3 Months Ended		6 Months Ended			6 Months Ended								3 Months Ended	6 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012	Sep. 30, 2012	Mar. 31, 2013 Residential real estate class	Mar. 31, 2012 Residential real estate	Mar. 31, 2013 Residential real estate Minimum family	Mar. 31, 2013 Residential real estate Maximum family	Mar. 31, 2013 First mortgage	Mar. 31, 2012 First mortgage	Mar. 31, 2013 Second mortgage	Mar. 31, 2012 Second mortgage	Dec. 31, 2007 Second mortgage Minimum	Mar. 31, 2013 Second mortgage Maximum	Mar. 31, 2013 Home equity lines of credit	Mar. 31, 2012 Home equity lines of credit	Mar. 31, 2013 Commercial loans class	Mar. 31, 2012 Commercial loans	Mar. 31, 2013 Commercial and multi-family real estate	Mar. 31, 2012 Commercial and multi-family real estate	Mar. 31, 2013 Commercial and multi-family real estate Minimum family tenant	Mar. 31, 2013 Land acquisition and development	Mar. 31, 2012 Land acquisition and development	Mar. 31, 2013 Land acquisition and development Maximum	Mar. 31, 2013 Real estate construction and development	Mar. 31, 2012 Real estate construction and development	Mar. 31, 2013 Commercial & industrial	Mar. 31, 2012 Commercial & industrial	Mar. 31, 2013 Consumer and other	Mar. 31, 2012 Consumer and other
LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES
Charge-offs of impaired loans	$ 1,600,000	$ 13,200,000	$ 5,200,000	$ 16,200,000
Partial charge-offs of non-performing and impaired loans	269,000	8,100,000	2,700,000	8,100,000
Remaining principal balance of non-performing and impaired loans for which partial charge-offs were recorded previously	13,100,000		13,100,000		16,200,000
Allowance for loan losses
Number of classes in loans receivable						3												4
Number of families per real estate property securing loans receivable								1	4													4
Period for repayment of interest and principal																10 years
Loan-to-value ratio at the time of origination (as a percent)									80.00%						80.00%
Loan-to-value ratio required at the time of origination for private mortgage insurance (as a percent)								80.00%
Combined loan to value ratio (as a percent)														80.00%
Initial maturity period																10 years
Initial period for payment of interest																10 years
Maturity period																15 years
Draw period requiring interest-only payments																5 years
Draw period requiring payment of principal and interest on a fully-amortizing basis																10 years
Number of tenants per real estate property securing loans receivable																						1
Period from development completion date to sale																									12 months
Activity in the allowance for loan losses
Balance, beginning of period			17,116,595	25,713,622		9,348,111	16,842,446											7,633,303	8,256,032
Provision charged to expense			3,440,000	8,500,000		3,596,746	4,929,593											(229,741)	3,442,492
Charge-offs		5,900,000	5,208,838	16,158,064		3,819,006	10,317,878			1,602,051	5,052,599	867,706	1,428,006			1,349,249	3,837,273	1,330,722	5,348,106	564,315	3,610,249		23,044	261,725		259,743	241,501	483,620	1,234,631	59,110	492,080
Recoveries			3,260,011	198,823		294,804	111,197			28,484	10,967	109,182	20,414			157,138	79,816	2,947,653	79,895	1,108,769	59,636		16,660	6,431		1,797,077	465	25,147	13,363	17,554	7,731
Net charge-offs			1,948,827	15,959,241
Balance, end of period	$ 18,607,768	$ 18,254,381	$ 18,607,768	$ 18,254,381		$ 9,420,655	$ 11,565,358											$ 9,020,493	$ 6,430,313