Fair Value Measurements and Disclosures about Fair Value of Financial Instruments (Carrying Value And Estimated Fair Value Of Financial Instruments) (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Sep. 30, 2012
Derivative financial instruments included in other assets:
Interest rate cap	$ 17	$ 11
Financial assets:
Cash and due from banks	7,903	27,569
Interest-bearing deposits with banks	13,212	11,222
Trading account securities	2,277	3,562
Securities available for sale	165,051	152,543
Securities held to maturity	6,772	7,848
Loans, net	404,482	389,067
Loans held for sale	233	643
Federal Home Loan Bank stock	5,400	5,400
Accrued interest receivable	2,708	2,412
Financial liabilities:
Deposits	484,383	494,234
Short-term repurchase agreements	1,334	1,329
Borrowings from Federal Home Loan Bank	76,365	53,062
Other long-term debt	4,962	2,132
Accrued interest payable	186	236
Advance payments by borrowers for taxes and insurance	464	622
Level 1
Derivative financial instruments included in other assets:
Interest rate cap	0	0
Financial assets:
Cash and due from banks	7,903	27,569
Interest-bearing deposits with banks	13,212	11,222
Trading account securities	0	0
Securities available for sale	91	69
Securities held to maturity	0	0
Loans, net	0	0
Loans held for sale	0	0
Federal Home Loan Bank stock	0	0
Accrued interest receivable	0	0
Financial liabilities:
Deposits	0	0
Short-term repurchase agreements	0	0
Borrowings from Federal Home Loan Bank	0	0
Other long-term debt	0	0
Accrued interest payable	0	0
Advance payments by borrowers for taxes and insurance	0	0
Level 2
Derivative financial instruments included in other assets:
Interest rate cap	17	11
Financial assets:
Cash and due from banks	0	0
Interest-bearing deposits with banks	0	0
Trading account securities	2,277	3,562
Securities available for sale	164,960	152,474
Securities held to maturity	6,795	8,314
Loans, net	0	0
Loans held for sale	233	643
Federal Home Loan Bank stock	5,400	5,400
Accrued interest receivable	2,708	2,412
Financial liabilities:
Deposits	0	0
Short-term repurchase agreements	1,334	1,329
Borrowings from Federal Home Loan Bank	73,843	53,752
Other long-term debt	4,962	2,132
Accrued interest payable	186	236
Advance payments by borrowers for taxes and insurance	464	622
Level 3
Derivative financial instruments included in other assets:
Interest rate cap	0	0
Financial assets:
Cash and due from banks	0	0
Interest-bearing deposits with banks	0	0
Trading account securities	0	0
Securities available for sale	0	0
Securities held to maturity	0	0
Loans, net	410,460	388,790
Loans held for sale	0	0
Federal Home Loan Bank stock	0	0
Accrued interest receivable	0	0
Financial liabilities:
Deposits	473,590	492,161
Short-term repurchase agreements	0	0
Borrowings from Federal Home Loan Bank	0	0
Other long-term debt	0	0
Accrued interest payable	0	0
Advance payments by borrowers for taxes and insurance	$ 0	$ 0