Loans and Allowance for Loan Losses - Summary of Impaired Loans (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Jun. 30, 2014	Jun. 30, 2013
Financing Receivable, Impaired [Line Items]
Recorded Balance	$ 4,545	$ 6,306
Unpaid Principal Balance	4,545	6,306
Specific Allowance, Loans with a specific allowance	215	441
Average Investment in Impaired Loans	4,694	6,494
Interest Income Recognized	106	44
Interest on Cash Basis	128	58
One- to Four-Family [Member]
Financing Receivable, Impaired [Line Items]
Recorded Balance, Loans without a specific allowance	2,107	2,375
Recorded Balance	2,781	4,100
Unpaid Principal Balance, Loans without a specific allowance	2,107	2,375
Unpaid Principal Balance	2,781	4,100
Average Investment in Impaired Loans, Loans without a specific allowance	2,174	2,405
Interest Income Recognized, Loans without a specific allowance	25	14
Interest on Cash Basis, Loans without a specific allowance	31	19
Recorded Balance, Loans with a specific allowance	674	1,725
Unpaid Principal Balance, Loans with a specific allowance	674	1,725
Specific Allowance, Loans with a specific allowance	143	403
Average Investment in Impaired Loans, Loans with a specific allowance	689	1,741
Average Investment in Impaired Loans	2,863	4,146
Interest Income Recognized, Loans with a specific allowance	1	6
Interest Income Recognized	26	20
Interest on Cash Basis, Loans with a specific allowance	1	9
Interest on Cash Basis	32	28
Multi-Family [Member]
Financing Receivable, Impaired [Line Items]
Recorded Balance, Loans without a specific allowance	1,621	1,706
Recorded Balance	1,621	1,706
Unpaid Principal Balance, Loans without a specific allowance	1,621	1,706
Unpaid Principal Balance	1,621	1,706
Average Investment in Impaired Loans, Loans without a specific allowance	1,664	1,773
Interest Income Recognized, Loans without a specific allowance	78	3
Interest on Cash Basis, Loans without a specific allowance	94	5
Recorded Balance, Loans with a specific allowance
Unpaid Principal Balance, Loans with a specific allowance
Specific Allowance, Loans with a specific allowance
Average Investment in Impaired Loans, Loans with a specific allowance
Average Investment in Impaired Loans	1,664	1,773
Interest Income Recognized, Loans with a specific allowance
Interest Income Recognized	78	3
Interest on Cash Basis, Loans with a specific allowance
Interest on Cash Basis	94	5
Commercial [Member]
Financing Receivable, Impaired [Line Items]
Recorded Balance, Loans without a specific allowance		148
Recorded Balance	55	194
Unpaid Principal Balance, Loans without a specific allowance		148
Unpaid Principal Balance	55	194
Average Investment in Impaired Loans, Loans without a specific allowance		154
Interest Income Recognized, Loans without a specific allowance		6
Interest on Cash Basis, Loans without a specific allowance		7
Recorded Balance, Loans with a specific allowance	55	46
Unpaid Principal Balance, Loans with a specific allowance	55	46
Specific Allowance, Loans with a specific allowance	35	8
Average Investment in Impaired Loans, Loans with a specific allowance	59	70
Average Investment in Impaired Loans	59	224
Interest Income Recognized, Loans with a specific allowance
Interest Income Recognized		6
Interest on Cash Basis, Loans with a specific allowance
Interest on Cash Basis		7
Home Equity Lines of Credit [Member]
Financing Receivable, Impaired [Line Items]
Recorded Balance, Loans without a specific allowance
Recorded Balance	28
Unpaid Principal Balance, Loans without a specific allowance
Unpaid Principal Balance	28
Average Investment in Impaired Loans, Loans without a specific allowance
Interest Income Recognized, Loans without a specific allowance
Interest on Cash Basis, Loans without a specific allowance
Recorded Balance, Loans with a specific allowance	28
Unpaid Principal Balance, Loans with a specific allowance	28
Specific Allowance, Loans with a specific allowance	21
Average Investment in Impaired Loans, Loans with a specific allowance	29
Average Investment in Impaired Loans	29
Interest Income Recognized, Loans with a specific allowance	1
Interest Income Recognized	1
Interest on Cash Basis, Loans with a specific allowance	1
Interest on Cash Basis	1
Construction [Member]
Financing Receivable, Impaired [Line Items]
Recorded Balance, Loans without a specific allowance
Recorded Balance
Unpaid Principal Balance, Loans without a specific allowance
Unpaid Principal Balance
Average Investment in Impaired Loans, Loans without a specific allowance
Interest Income Recognized, Loans without a specific allowance
Interest on Cash Basis, Loans without a specific allowance
Recorded Balance, Loans with a specific allowance
Unpaid Principal Balance, Loans with a specific allowance
Specific Allowance, Loans with a specific allowance
Average Investment in Impaired Loans, Loans with a specific allowance
Average Investment in Impaired Loans
Interest Income Recognized, Loans with a specific allowance
Interest Income Recognized
Interest on Cash Basis, Loans with a specific allowance
Interest on Cash Basis
Commercial [Member]
Financing Receivable, Impaired [Line Items]
Recorded Balance, Loans without a specific allowance	29	204
Recorded Balance	29	242
Unpaid Principal Balance, Loans without a specific allowance	29	204
Unpaid Principal Balance	29	242
Average Investment in Impaired Loans, Loans without a specific allowance		233
Interest Income Recognized, Loans without a specific allowance		13
Interest on Cash Basis, Loans without a specific allowance		14
Recorded Balance, Loans with a specific allowance		38
Unpaid Principal Balance, Loans with a specific allowance		38
Specific Allowance, Loans with a specific allowance		5
Average Investment in Impaired Loans, Loans with a specific allowance	34	40
Average Investment in Impaired Loans	34	273
Interest Income Recognized, Loans with a specific allowance
Interest Income Recognized		13
Interest on Cash Basis, Loans with a specific allowance		1
Interest on Cash Basis		15
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Recorded Balance, Loans without a specific allowance	15	2
Recorded Balance	31	64
Unpaid Principal Balance, Loans without a specific allowance	15	2
Unpaid Principal Balance	31	64
Average Investment in Impaired Loans, Loans without a specific allowance	26	3
Interest Income Recognized, Loans without a specific allowance
Interest on Cash Basis, Loans without a specific allowance
Recorded Balance, Loans with a specific allowance	16	62
Unpaid Principal Balance, Loans with a specific allowance	16	62
Specific Allowance, Loans with a specific allowance	16	25
Average Investment in Impaired Loans, Loans with a specific allowance	19	75
Average Investment in Impaired Loans	45	78
Interest Income Recognized, Loans with a specific allowance	1	2
Interest Income Recognized	1	2
Interest on Cash Basis, Loans with a specific allowance	1	3
Interest on Cash Basis	$ 1	$ 3

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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=28368275&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=28368275&loc=d3e5258-111524

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+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 14A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953550-111524

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