Loans and Allowance for Loan Losses (Additional Information) (Detail) (USD $)	9 Months Ended
	Jun. 30, 2012	Jun. 30, 2013	Sep. 30, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Troubled debt restructuring modified within the previous twelve months	$ 262,000	$ 218,000
Net charge-off	42,000
Financing Receivable Recorded Investment Nonaccrual Status		5,776,000	4,089,000
Financing Receivable Recorded Investment 90 Days Past Due and Still Accruing		$ 657,000	$ 1,743,000