Note 4. Loans Receivable (Detail) - Past Due and Nonaccrual Loans (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Total	$ 350,016	$ 353,508
Past Due 30-89 Days [Member] | One-to-Four-Family Residential [Member] | Accruing and Nonacrrual Loans [Member]
Accruing and nonaccrual loans	1,121	8,319
Past Due 30-89 Days [Member] | Home Equity and Second Mortgage [Member] | Accruing and Nonacrrual Loans [Member]
Accruing and nonaccrual loans	88	126
Past Due 30-89 Days [Member] | Multifamily Residential [Member] | Accruing and Nonacrrual Loans [Member]
Accruing and nonaccrual loans		31
Past Due 30-89 Days [Member] | Commercial Real Estate Loans [Member] | Accruing and Nonacrrual Loans [Member]
Accruing and nonaccrual loans	1,390	1,371
Past Due 30-89 Days [Member] | Other Construction and Land [Member] | Accruing and Nonacrrual Loans [Member]
Accruing and nonaccrual loans	421	191
Past Due 30-89 Days [Member] | Commercial Loans [Member] | Accruing and Nonacrrual Loans [Member]
Accruing and nonaccrual loans	3
Past Due 30-89 Days [Member] | Consumer Loans [Member] | Accruing and Nonacrrual Loans [Member]
Accruing and nonaccrual loans	15	23
Past Due 30-89 Days [Member] | Accruing and Nonacrrual Loans [Member]
Accruing and nonaccrual loans	3,038	10,061
Ninety Days or More Past Due [Member] | One-to-Four-Family Residential [Member] | Accruing and Nonacrrual Loans [Member]
Accruing and nonaccrual loans	4,866	5,604
Ninety Days or More Past Due [Member] | Home Equity and Second Mortgage [Member] | Accruing and Nonacrrual Loans [Member]
Accruing and nonaccrual loans	323	437
Ninety Days or More Past Due [Member] | Commercial Real Estate Loans [Member] | Accruing and Nonacrrual Loans [Member]
Accruing and nonaccrual loans	2,118	4,752
Ninety Days or More Past Due [Member] | Other Construction and Land [Member] | Accruing and Nonacrrual Loans [Member]
Accruing and nonaccrual loans	3,910	1,344
Ninety Days or More Past Due [Member] | Commercial Loans [Member] | Accruing and Nonacrrual Loans [Member]
Accruing and nonaccrual loans	380	388
Ninety Days or More Past Due [Member] | Consumer Loans [Member] | Accruing and Nonacrrual Loans [Member]
Accruing and nonaccrual loans	81	5
Ninety Days or More Past Due [Member] | Accruing and Nonacrrual Loans [Member]
Accruing and nonaccrual loans	11,678	12,530
One-to-Four-Family Residential [Member] | Accruing and Nonacrrual Loans [Member]
Current	155,094	169,235
Total	161,081	183,158
One-to-Four-Family Residential [Member]
Total	161,081	183,158
Home Equity and Second Mortgage [Member] | Accruing and Nonacrrual Loans [Member]
Current	9,511	11,939
Total	9,922	12,502
Home Equity and Second Mortgage [Member]
Total	9,922	12,502
Multifamily Residential [Member] | Accruing and Nonacrrual Loans [Member]
Current	13,254	20,445
Total	13,254	20,476
Multifamily Residential [Member]
Total	13,254	20,476
Commercial Real Estate Loans [Member] | Accruing and Nonacrrual Loans [Member]
Current	113,198	89,797
Total	116,706	95,920
Commercial Real Estate Loans [Member]
Total	116,706	95,920
One-to-Four-Family Construction [Member] | Accruing and Nonacrrual Loans [Member]
Current	2,631	2,391
Total	2,631	2,391
One-to-Four-Family Construction [Member]
Total	2,631	2,391
Other Construction and Land [Member] | Accruing and Nonacrrual Loans [Member]
Current	17,922	21,908
Total	22,253	23,443
Other Construction and Land [Member]
Total	22,253	23,443
Commercial Loans [Member] | Accruing and Nonacrrual Loans [Member]
Current	17,148	7,215
Total	17,531	7,603
Commercial Loans [Member]
Total	17,531	7,603
Consumer Loans [Member] | Accruing and Nonacrrual Loans [Member]
Current	6,542	7,987
Total	6,638	8,015
Consumer Loans [Member]
Total	6,638	8,015
Accruing and Nonacrrual Loans [Member]
Current	335,300	330,917
Total	$ 350,016	$ 353,508