Loans and Allowance for Loan Losses (Aging of Recorded Investment in Past Due Loans) (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Sep. 30, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	$ 3,832	$ 5,102
60-89 Days Past Due	1,996	2,114
90 + Days Past Due	4,927	4,925
Total Past Due	10,755	12,141
Current	400,338	383,190
Recorded investment in loans	411,093	395,331
Residential Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	3,243	4,636
60-89 Days Past Due	1,747	1,926
90 + Days Past Due	3,468	3,754
Total Past Due	8,458	10,316
Current	177,319	181,835
Recorded investment in loans	185,777	192,151
Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	242	20
60-89 Days Past Due	40	90
90 + Days Past Due	897	833
Total Past Due	1,179	943
Current	114,526	89,577
Recorded investment in loans	115,705	90,520
Construction Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	0	0
60-89 Days Past Due	0	0
90 + Days Past Due	0	0
Total Past Due	0	0
Current	12,052	9,308
Recorded investment in loans	12,052	9,308
Commercial business loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	99	109
60-89 Days Past Due	12	0
90 + Days Past Due	370	164
Total Past Due	481	273
Current	31,493	36,031
Recorded investment in loans	31,974	36,304
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	202	286
60-89 Days Past Due	61	98
90 + Days Past Due	192	174
Total Past Due	455	558
Current	27,336	30,190
Recorded investment in loans	27,791	30,748
Multi-family residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	0	0
60-89 Days Past Due	0	0
90 + Days Past Due	0	0
Total Past Due	0	0
Current	27,164	23,942
Recorded investment in loans	27,164	23,942
Land and land development
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	46	51
60-89 Days Past Due	136	0
90 + Days Past Due	0	0
Total Past Due	182	51
Current	10,448	12,307
Recorded investment in loans	$ 10,630	$ 12,358