Loans and Allowance for Loan Losses - Credit Risk Profile of Association's Loan Portfolio Based on Rating Category and Payment Activity (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Jun. 30, 2012	Dec. 31, 2011
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 289,656	$ 264,043	$ 251,639
Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,735	8,396	5,017
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	12,484	13,917	13,535
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	10,852	13,578	14,865
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	279,650	256,665
Pass [Member] | Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,735	8,396
Pass [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	11,102	12,739
Pass [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	10,734	13,465
Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,768	1,788
Watch [Member] | Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans
Watch [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,109	1,176
Watch [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	3
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	7,238	5,590
Substandard [Member] | Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans
Substandard [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	273	2
Substandard [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	115	113
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans
Doubtful [Member] | Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans
Doubtful [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans
Doubtful [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans
Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans
Loss [Member] | Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans
Loss [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans
Loss [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans
One-to-Four Family [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	145,544	147,686	148,056
One-to-Four Family [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	139,674	143,180
One-to-Four Family [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,084	612
One-to-Four Family [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,786	3,894
One-to-Four Family [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans
One-to-Four Family [Member] | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans
Multi-Family [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	49,865	38,547	30,482
Multi-Family [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	47,917	37,069
Multi-Family [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	185
Multi-Family [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,763	1,478
Multi-Family [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans
Multi-Family [Member] | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	58,633	32,925	30,052
Commercial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	58,000	32,830
Commercial [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	387
Commercial [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	246	95
Commercial [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans
Commercial [Member] | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans
Home Equity Lines of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	8,543	8,994	9,632
Home Equity Lines of Credit [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	8,488	8,986
Home Equity Lines of Credit [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans
Home Equity Lines of Credit [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	55	8
Home Equity Lines of Credit [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans
Home Equity Lines of Credit [Member] | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans