Loans and Allowance for Loan Losses (Allowance For Loan Losses) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Sep. 30, 2012
Ending Allowance Balance Attributable to Loans:
Individually evaluated for impairment	$ 50		$ 50		$ 74
Collectively evaluated for impairment	5,285		5,285		4,832
Acquired with deteriorated credit quality	0		0		0
Ending balance	5,335	4,895	5,335	4,895
Changes in Allowance for Loan Losses:
Beginning balance	5,389	4,923	4,906	4,672
Provisions	560	308	1,562	897
Charge-Offs	(672)	(357)	(1,299)	(828)
Recoveries	58	21	166	154
Ending balance	5,335	4,895	5,335	4,895
Residential Real Estate
Ending Allowance Balance Attributable to Loans:
Individually evaluated for impairment	39		39		0
Collectively evaluated for impairment	777		777		908
Acquired with deteriorated credit quality	0		0		0
Ending balance	816	925	816	925
Changes in Allowance for Loan Losses:
Beginning balance	881	979	908	833
Provisions	(29)	29	50	359
Charge-Offs	(40)	(85)	(196)	(375)
Recoveries	4	2	54	108
Ending balance	816	925	816	925
Commercial real estate
Ending Allowance Balance Attributable to Loans:
Individually evaluated for impairment	0		0		60
Collectively evaluated for impairment	2,204		2,204		2,144
Acquired with deteriorated credit quality	0		0		0
Ending balance	2,204	1,981	2,204	1,981
Changes in Allowance for Loan Losses:
Beginning balance	2,171	1,612	2,204	1,314
Provisions	33	547	(14)	859
Charge-Offs	0	(178)	(11)	(192)
Recoveries	0	0	25	0
Ending balance	2,204	1,981	2,204	1,981
Construction Loans
Ending Allowance Balance Attributable to Loans:
Individually evaluated for impairment	0		0		0
Collectively evaluated for impairment	99		99		52
Acquired with deteriorated credit quality	0		0		0
Ending balance	99	79	99	79
Changes in Allowance for Loan Losses:
Beginning balance	63	64	52	56
Provisions	36	15	47	23
Charge-Offs	0	0	0	0
Recoveries	0	0	0	0
Ending balance	99	79	99	79
Commercial business loans
Ending Allowance Balance Attributable to Loans:
Individually evaluated for impairment	0		0		0
Collectively evaluated for impairment	1,688		1,688		1,084
Acquired with deteriorated credit quality	0		0		0
Ending balance	1,688	1,181	1,688	1,181
Changes in Allowance for Loan Losses:
Beginning balance	1,664	1,379	1,084	1,525
Provisions	590	(165)	1,576	(312)
Charge-Offs	(606)	(33)	(1,013)	(33)
Recoveries	40	0	41	1
Ending balance	1,688	1,181	1,688	1,181
Consumer
Ending Allowance Balance Attributable to Loans:
Individually evaluated for impairment	11		11		14
Collectively evaluated for impairment	211		211		253
Acquired with deteriorated credit quality	0		0		0
Ending balance	222	240	222	240
Changes in Allowance for Loan Losses:
Beginning balance	239	209	267	287
Provisions	(5)	73	(12)	136
Charge-Offs	(26)	(61)	(79)	(228)
Recoveries	14	19	46	45
Ending balance	222	240	222	240
Multi-family residential
Ending Allowance Balance Attributable to Loans:
Individually evaluated for impairment	0		0		0
Collectively evaluated for impairment	234		234		389
Acquired with deteriorated credit quality	0		0		0
Ending balance	234	465	234	465
Changes in Allowance for Loan Losses:
Beginning balance	328	647	389	604
Provisions	(94)	(182)	(155)	(139)
Charge-Offs	0	0	0	0
Recoveries	0	0	0	0
Ending balance	234	465	234	465
Land and land development
Ending Allowance Balance Attributable to Loans:
Individually evaluated for impairment	0		0		0
Collectively evaluated for impairment	72		72		2
Acquired with deteriorated credit quality	0		0		0
Ending balance	72	24	72	24
Changes in Allowance for Loan Losses:
Beginning balance	43	33	2	53
Provisions	29	(9)	70	(29)
Charge-Offs	0	0	0	0
Recoveries	0	0	0	0
Ending balance	$ 72	$ 24	$ 72	$ 24