Loans and Allowance for Loan Losses (Troubled Debt Restructurings) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Jun. 30, 2012 Loan	Jun. 30, 2013 Loan	Jun. 30, 2012 Loan
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Number of Loans	7	4	16
Pre- Modification Principal Balance	$ 989	$ 166	$ 4,348
Post- Modification Principal Balance	1,043	168	4,651
Residential Real Estate
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Number of Loans	6	2	13
Pre- Modification Principal Balance	830	143	1,620
Post- Modification Principal Balance	883	143	1,672
Commercial real estate
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Number of Loans			1
Pre- Modification Principal Balance			772
Post- Modification Principal Balance			506
Consumer
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Number of Loans	1	1	1
Pre- Modification Principal Balance	159	5	159
Post- Modification Principal Balance	160	5	160
Multi Family [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Number of Loans			1
Pre- Modification Principal Balance			1,797
Post- Modification Principal Balance			2,313
Commercial Business [Member]
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Number of Loans		1
Pre- Modification Principal Balance		18
Post- Modification Principal Balance		$ 20