Loans and Allowance for Loan Losses (Impaired Loans Individually Evaluated For Impairment) (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
Financing Receivable, Impaired [Line Items]
Loans with no related allowance recorded, Recorded Investment	$ 5,568		$ 5,568		$ 3,857
Loans with no related allowance recorded, Unpaid Principal Balance	5,901		5,901		4,271
Loans with no related allowance recorded, Average Recorded Investment	6,200	4,325	6,214	4,667
Loans with an allowance recorded, Recorded Investment	208		208		232
Loans with an allowance recorded, Unpaid Principal Balance	206		206		224
Loans with an allowance recorded, Related Allowance	50		50		74
Loans with an allowance recorded, Average Recorded Investment	600	547	614	513
Total, Recorded Investment	5,776		5,776		4,089
Total, Unpaid Principal Balance	6,107		6,107		4,495
Total, Related Allowance	50		50		74
Total, Average Recorded Investment	6,800	4,872	6,828	5,180
Residential Real Estate
Financing Receivable, Impaired [Line Items]
Loans with no related allowance recorded, Recorded Investment	4,200		4,200		2,775
Loans with no related allowance recorded, Unpaid Principal Balance	4,503		4,503		3,161
Loans with no related allowance recorded, Average Recorded Investment	4,634	2,303	4,615	2,927
Loans with an allowance recorded, Recorded Investment	135		135		0
Loans with an allowance recorded, Unpaid Principal Balance	133		133		0
Loans with an allowance recorded, Related Allowance	39		39		0
Loans with an allowance recorded, Average Recorded Investment	136	150	174	156
Total, Recorded Investment	4,335		4,335		2,775
Total, Unpaid Principal Balance	4,636		4,636		3,161
Total, Related Allowance	39		39		0
Total, Average Recorded Investment	4,770	2,453	4,789	3,083
Commercial real estate
Financing Receivable, Impaired [Line Items]
Loans with no related allowance recorded, Recorded Investment	794		794		745
Loans with no related allowance recorded, Unpaid Principal Balance	829		829		772
Loans with no related allowance recorded, Average Recorded Investment	766	1,316	754	1,082
Loans with an allowance recorded, Recorded Investment	0		0		154
Loans with an allowance recorded, Unpaid Principal Balance	0		0		146
Loans with an allowance recorded, Related Allowance	0		0		60
Loans with an allowance recorded, Average Recorded Investment	147	221	141	229
Total, Recorded Investment	794		794		899
Total, Unpaid Principal Balance	829		829		918
Total, Related Allowance	0		0		60
Total, Average Recorded Investment	913	1,537	895	1,311
Construction Loans
Financing Receivable, Impaired [Line Items]
Loans with no related allowance recorded, Recorded Investment	177		177		174
Loans with no related allowance recorded, Unpaid Principal Balance	174		174		174
Loans with no related allowance recorded, Average Recorded Investment	174	174	174	174
Loans with an allowance recorded, Recorded Investment	0		0		0
Loans with an allowance recorded, Unpaid Principal Balance	0		0		0
Loans with an allowance recorded, Related Allowance	0		0		0
Loans with an allowance recorded, Average Recorded Investment	0	0	0	0
Total, Recorded Investment	177		177		174
Total, Unpaid Principal Balance	174		174		174
Total, Related Allowance	0		0		0
Total, Average Recorded Investment	174	174	174	174
Commercial business loans
Financing Receivable, Impaired [Line Items]
Loans with no related allowance recorded, Recorded Investment	218		218		66
Loans with no related allowance recorded, Unpaid Principal Balance	218		218		65
Loans with no related allowance recorded, Average Recorded Investment	443	82	498	41
Loans with an allowance recorded, Recorded Investment	0		0		0
Loans with an allowance recorded, Unpaid Principal Balance	0		0		0
Loans with an allowance recorded, Related Allowance	0		0		0
Loans with an allowance recorded, Average Recorded Investment	247	0	219	0
Total, Recorded Investment	218		218		66
Total, Unpaid Principal Balance	218		218		65
Total, Related Allowance	0		0		0
Total, Average Recorded Investment	690	82	717	41
Consumer
Financing Receivable, Impaired [Line Items]
Loans with no related allowance recorded, Recorded Investment	179		179		97
Loans with no related allowance recorded, Unpaid Principal Balance	177		177		99
Loans with no related allowance recorded, Average Recorded Investment	183	110	173	103
Loans with an allowance recorded, Recorded Investment	73		73		78
Loans with an allowance recorded, Unpaid Principal Balance	73		73		78
Loans with an allowance recorded, Related Allowance	11		11		14
Loans with an allowance recorded, Average Recorded Investment	70	176	80	128
Total, Recorded Investment	252		252		175
Total, Unpaid Principal Balance	250		250		177
Total, Related Allowance	11		11		14
Total, Average Recorded Investment	253	286	253	231
Multi-family residential
Financing Receivable, Impaired [Line Items]
Loans with no related allowance recorded, Recorded Investment	0		0		0
Loans with no related allowance recorded, Unpaid Principal Balance	0		0		0
Loans with no related allowance recorded, Average Recorded Investment	0	0	0	0
Loans with an allowance recorded, Recorded Investment	0		0		0
Loans with an allowance recorded, Unpaid Principal Balance	0		0		0
Loans with an allowance recorded, Related Allowance	0		0		0
Loans with an allowance recorded, Average Recorded Investment	0	0	0	0
Total, Recorded Investment	0		0		0
Total, Unpaid Principal Balance	0		0		0
Total, Related Allowance	0		0		0
Total, Average Recorded Investment	0	0	0	0
Land and land development
Financing Receivable, Impaired [Line Items]
Loans with no related allowance recorded, Recorded Investment	0		0		0
Loans with no related allowance recorded, Unpaid Principal Balance	0		0		0
Loans with no related allowance recorded, Average Recorded Investment	0	340	0	340
Loans with an allowance recorded, Recorded Investment	0		0		0
Loans with an allowance recorded, Unpaid Principal Balance	0		0		0
Loans with an allowance recorded, Related Allowance	0		0		0
Loans with an allowance recorded, Average Recorded Investment	0	0	0	0
Total, Recorded Investment	0		0		0
Total, Unpaid Principal Balance	0		0		0
Total, Related Allowance	0		0		0
Total, Average Recorded Investment	$ 0	$ 340	$ 0	$ 340

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Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 17

-URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5258-111524

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 14A

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-URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524

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