Loans and Allowance for Loan Losses - Loans Modified as Troubled Debt Restructurings (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Mar. 31, 2013 Modification	Mar. 31, 2013 Modification	Jun. 30, 2012 Modification	Mar. 31, 2012 Modification
Financing Receivable Modifications Number Of Contracts [Line Items]
Number of Modifications	1	1
Recorded Investment	$ 67	$ 67
One-to four-family [Member]
Financing Receivable Modifications Number Of Contracts [Line Items]
Number of Modifications			13	13
Recorded Investment
Home Equity Lines of Credit [Member]
Financing Receivable Modifications Number Of Contracts [Line Items]
Number of Modifications
Recorded Investment
Multi-family [Member]
Financing Receivable Modifications Number Of Contracts [Line Items]
Number of Modifications			1
Recorded Investment
Commercial [Member]
Financing Receivable Modifications Number Of Contracts [Line Items]
Number of Modifications	1	1
Recorded Investment	67	67
Real Estate Loan [Member]
Financing Receivable Modifications Number Of Contracts [Line Items]
Number of Modifications
Recorded Investment
Construction [Member]
Financing Receivable Modifications Number Of Contracts [Line Items]
Number of Modifications	3	3
Recorded Investment		43
Commercial [Member]
Financing Receivable Modifications Number Of Contracts [Line Items]
Number of Modifications
Recorded Investment
Consumer [Member]
Financing Receivable Modifications Number Of Contracts [Line Items]
Number of Modifications	1	1
Recorded Investment	$ 67	$ 110