Loans and Allowance for Loan Losses - Association's Loan Portfolio Aging Analysis (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Jun. 30, 2012	Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]
30-59 Days Past Due	$ 3,490	$ 2,754
60-89 Days Past Due	914	1,148
90 Days or Greater	3,177	1,996
Total Past Due	7,581	5,898
Current	282,075	258,145
Total loans	289,656	264,043	251,639
Total Loans 90 Days Past Due & Accruing	750
Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
30-59 Days Past Due
60-89 Days Past Due
90 Days or Greater
Total Past Due
Current	3,735	8,396
Total loans	3,735	8,396	5,017
Total Loans 90 Days Past Due & Accruing
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
30-59 Days Past Due	14	28
60-89 Days Past Due	7	11
90 Days or Greater
Total Past Due	21	39
Current	12,463	13,878
Total loans	12,484	13,917	13,535
Total Loans 90 Days Past Due & Accruing
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
30-59 Days Past Due	186	185
60-89 Days Past Due	35	23
90 Days or Greater	68	40
Total Past Due	289	248
Current	10,563	13,330
Total loans	10,852	13,578	14,865
Total Loans 90 Days Past Due & Accruing	3
One-to-Four Family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
30-59 Days Past Due	2,770	2,290
60-89 Days Past Due	860	1,057
90 Days or Greater	3,054	1,949
Total Past Due	6,684	5,296
Current	138,860	142,390
Total loans	145,544	147,686	148,056
Total Loans 90 Days Past Due & Accruing	747
Multi-Family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
30-59 Days Past Due
60-89 Days Past Due
90 Days or Greater
Total Past Due
Current	49,865	38,547
Total loans	49,865	38,547	30,482
Total Loans 90 Days Past Due & Accruing
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
30-59 Days Past Due	40	176
60-89 Days Past Due
90 Days or Greater
Total Past Due	40	176
Current	58,593	32,749
Total loans	58,633	32,925
Total Loans 90 Days Past Due & Accruing
Home Equity Lines of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
30-59 Days Past Due	480	75
60-89 Days Past Due	12	57
90 Days or Greater	55	7
Total Past Due	547	139
Current	7,996	8,855
Total loans	8,543	8,994	9,632
Total Loans 90 Days Past Due & Accruing