Note 8 - Allowance for Loan Losses (Detail) - Activity in the Allowance for Loan Losses (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended			3 Months Ended		6 Months Ended			3 Months Ended	6 Months Ended					3 Months Ended		6 Months Ended			3 Months Ended		6 Months Ended			3 Months Ended		6 Months Ended			3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended			3 Months Ended		6 Months Ended			3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011	Jun. 30, 2012 One-to-Four Family Residential [Member]	Jun. 30, 2011 One-to-Four Family Residential [Member]	Jun. 30, 2012 One-to-Four Family Residential [Member]	Jun. 30, 2011 One-to-Four Family Residential [Member]	Dec. 31, 2011 One-to-Four Family Residential [Member]	Jun. 30, 2012 Multifamily Residential Loans [Member]	Jun. 30, 2012 Multifamily Residential Loans [Member]	Dec. 31, 2011 Multifamily Residential Loans [Member]	Jun. 30, 2011 Multifamily Residential Loans [Member]	Mar. 31, 2011 Multifamily Residential Loans [Member]	Dec. 31, 2010 Multifamily Residential Loans [Member]	Jun. 30, 2012 Construction Loans [Member]	Jun. 30, 2011 Construction Loans [Member]	Jun. 30, 2012 Construction Loans [Member]	Jun. 30, 2011 Construction Loans [Member]	Dec. 31, 2011 Construction Loans [Member]	Jun. 30, 2012 Commercial Land Loans [Member]	Jun. 30, 2011 Commercial Land Loans [Member]	Jun. 30, 2012 Commercial Land Loans [Member]	Jun. 30, 2011 Commercial Land Loans [Member]	Dec. 31, 2011 Commercial Land Loans [Member]	Jun. 30, 2012 Residential Development [Member]	Jun. 30, 2011 Residential Development [Member]	Jun. 30, 2012 Residential Development [Member]	Jun. 30, 2011 Residential Development [Member]	Dec. 31, 2011 Residential Development [Member]	Jun. 30, 2012 Other Commercial Real Estate Loans [Member]	Jun. 30, 2011 Other Commercial Real Estate Loans [Member]	Jun. 30, 2012 Other Commercial Real Estate Loans [Member]	Jun. 30, 2011 Other Commercial Real Estate Loans [Member]	Jun. 30, 2012 Consumer Real Estate Loans [Member]	Jun. 30, 2011 Consumer Real Estate Loans [Member]	Jun. 30, 2012 Consumer Real Estate Loans [Member]	Jun. 30, 2011 Consumer Real Estate Loans [Member]	Dec. 31, 2011 Consumer Real Estate Loans [Member]	Jun. 30, 2012 Commercial Business Loans [Member]	Jun. 30, 2011 Commercial Business Loans [Member]	Jun. 30, 2012 Commercial Business Loans [Member]	Jun. 30, 2011 Commercial Business Loans [Member]	Dec. 31, 2011 Commercial Business Loans [Member]	Jun. 30, 2012 Other Consumer Loans [Member]	Jun. 30, 2011 Other Consumer Loans [Member]	Jun. 30, 2012 Other Consumer Loans [Member]	Jun. 30, 2011 Other Consumer Loans [Member]	Dec. 31, 2011 Other Consumer Loans [Member]
Allowance for loan losses
Balance - Beginning of period	$ 11,583	$ 12,006	$ 11,713	$ 11,924		$ 534	$ 528	$ 500	$ 500		$ 150	$ 150		$ 200	$ 200	$ 200	$ 650	$ 1,014	$ 800	$ 1,000		$ 2,344	$ 2,014	$ 2,334	$ 2,163		$ 2,064	$ 1,996	$ 1,999	$ 2,000		$ 1,927	$ 1,645	$ 1,830	$ 1,561	$ 1,372	$ 1,551	$ 1,600	$ 1,500		$ 2,002	$ 2,500	$ 2,000	$ 2,500		$ 540	$ 558	$ 500	$ 500
Balance - End of period	11,735	12,742	11,735	12,742		544	520	544	520		150	150		200	200	200	652	1,190	652	1,190		2,463	2,223	2,463	2,223		2,014	2,038	2,014	2,038		1,974	1,919	1,974	1,919	1,320	1,568	1,320	1,568		2,036	2,525	2,036	2,525		582	559	582	559
Allowance for loans collectively evaluated for impairment	11,735	12,742	11,735	12,742		544	520	544	520		150	150		200			652	1,190	652	1,190		2,463	2,223	2,463	2,223		2,014	2,038	2,014	2,038		1,974	1,919	1,974	1,919	1,320	1,568	1,320	1,568		2,036	2,525	2,036	2,525		582	559	582	559
Total	11,735	12,742	11,735	12,742		544	520	544	520		150	150		200	200	200	652	1,190	652	1,190		2,463	2,223	2,463	2,223		2,014	2,038	2,014	2,038		1,974	1,919	1,974	1,919	1,320	1,568	1,320	1,568		2,036	2,525	2,036	2,525		582	559	582	559
Charge-offs	(2,893)	(1,325)	(9,496)	(4,361)		(518)	(312)	(1,417)	(1,137)									(5)		(41)		(101)	(291)	(191)	(2,244)		(313)	(386)	(2,805)	(386)		(938)	(256)	(2,319)	(256)	(774)	(35)	(2,504)	(91)		(227)	(35)	(227)	(188)		(22)	(5)	(33)	(18)
Recoveries	490	361	663	479		35	4	68	7		4	4					2	181		231		119	0	119			32	128	89	128		235	30	314	14	59	2	61	9		1	10	3	13		3	6	5	77
Provision	2,555	1,700	8,855	4,700		450	300	1,350	1,150										(150)				500	100	1,250		150	300	2,650	1,350		500	500	1,900	600	650	50	2,150	150		250	50	250	200		50		100
Loans
Loans individually evaluated for impairment	27,565	29,372	27,565	29,372		4,488	2,739	4,488	2,739													3,194	2,826	3,194	2,826		3,472	8,262	3,472	8,262		14,401	12,657	14,401	12,657	1,047	2,630	1,047	2,630		945	169	945	169		18	89	18	89
Loans collectively evaluated for impairment	559,933	544,728	559,933	544,728		109,833	114,120	109,833	114,120		17,074	17,074		16,759			27,114	19,602	27,114	19,602		19,691	25,296	19,691	25,296		6,596	8,182	6,596	8,182		233,874	213,326	233,874	213,326	98,115	100,891	98,115	100,891		42,690	40,992	42,690	40,992		4,946	5,560	4,946	5,560
Total non-covered loans	$ 587,498	$ 574,100	$ 587,498	$ 574,100	$ 574,100	$ 114,321	$ 116,859	$ 114,321	$ 116,859	$ 116,859	$ 17,074	$ 17,074	$ 16,759	$ 16,759			$ 27,114	$ 19,602	$ 27,114	$ 19,602	$ 19,602	$ 22,885	$ 28,122	$ 22,885	$ 28,122	$ 28,122	$ 10,068	$ 16,444	$ 10,068	$ 16,444	$ 16,444	$ 248,275	$ 225,983	$ 248,275	$ 225,983	$ 99,162	$ 103,521	$ 99,162	$ 103,521	$ 103,521	$ 43,635	$ 41,161	$ 43,635	$ 41,161	$ 41,161	$ 4,964	$ 5,649	$ 4,964	$ 5,649	$ 5,649