Loans and Allowance for Loan Losses (Additional Information) (Detail) - USD ($)	3 Months Ended	9 Months Ended
	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Interest Income, Cash Basis Method, Total	$ 11,000	$ 5,000	$ 52,000
Two TDR [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Troubled debt restructuring modified within the previous twelve months			$ 476,000