Fair Value Accounting (Details 3) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011	Sep. 30, 2010
Financial assets:
Cash and cash equivalents, Carrying Amount	$ 25,306	$ 23,259	$ 19,397	$ 23,259	$ 31,763
Cash and cash equivalents, Fair Value	25,306	23,259
Interest Bearing Deposits Carrying Value	2,241	0
Interest Bearing Deposits, Fair Value	2,241	0
Securities available for sale Carrying Amount	73,663	67,111
Securities available for sale, Fair Value	73,663	67,111
FHLB stock, Carrying amount	3,800	3,800
FHLB stock, Fair Value	3,800	3,800
Loans receivable Carrying Amount	415,299	422,044
Loans receivable, Fair Value	447,739	452,520
Accrued interest receivable Carrying Amount	1,443	1,571
Accrued Interest Receivables, Fair Value	1,443	1,571
Financial liabilities:
Deposits, Carrying Amount	427,259	422,058
Deposits, Fair Value	431,650	427,893
FHLB advances, Carrying Amount	49,450	49,250
FHLB advances, Fair Value	49,905	50,254
Accrued Interest Payable, Carrying Amount	49	99
Accrued Interest Payable, Fair Value	$ 49	$ 99