Note 7 - Credit Quality of Loans (Detail) - Impaired Loans (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Recorded Investment	$ 28,500	$ 30,042
Unpaid Principal Balance	35,247	35,821
Net Principal Balance	27,565	29,372
One-to-Four Family Residential [Member]
Recorded Investment	4,696	2,781
Unpaid Principal Balance	5,143	2,739
Net Principal Balance	4,488	2,739
Commercial Land Loans [Member]
Recorded Investment	3,355	3,062
Unpaid Principal Balance	4,343	4,523
Net Principal Balance	3,194	2,826
Residential Development [Member]
Recorded Investment	3,679	8,428
Unpaid Principal Balance	5,427	10,173
Net Principal Balance	3,472	8,262
Commercial Real Estate - Office [Member]
Recorded Investment	7,449	6,322
Unpaid Principal Balance	8,584	7,573
Net Principal Balance	7,375	6,305
Commercial Real Estate - Residential Rental [Member]
Recorded Investment	2,288	4,076
Unpaid Principal Balance	2,933	4,808
Net Principal Balance	2,244	4,029
Owner Occupied Commercial Real Estate [Member]
Recorded Investment	2,721
Unpaid Principal Balance	3,301
Net Principal Balance	2,614
Other Commercial Real Estate Loans [Member]
Recorded Investment	2,188	2,426
Unpaid Principal Balance	2,585	2,945
Net Principal Balance	2,168	2,323
Consumer Real Estate Loans [Member]
Recorded Investment	1,158	2,689
Unpaid Principal Balance	1,968	2,801
Net Principal Balance	1,047	2,630
Commercial Business Loans [Member]
Recorded Investment	948	169
Unpaid Principal Balance	945	169
Net Principal Balance	945	169
Other Consumer Loans [Member]
Recorded Investment	18	89
Unpaid Principal Balance	18	90
Net Principal Balance	$ 18	$ 89