Note 4: Loans and Allowance for Loan Losses (Detail) - Allowance for Loan Losses Activity (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Allowance for loan losses:
Balance	$ 13,126,000	$ 13,948,000	$ 10,613,145	$ 13,083,000
Balance	8,476,454	13,557,000	8,476,454	13,557,000
Provision charged to expense	2,600,000	900,000	5,600,000	2,800,000
Losses charged off	(7,357,000)	(1,366,000)	(7,997,000)	(3,772,000)
Recoveries	107,000	75,000	260,000	1,446,000
Real Estate Construction [Member]
Allowance for loan losses:
Balance	2,368,000	5,036,000	2,508,000	4,547,000
Balance	1,805,000	4,884,000	1,805,000	4,884,000
Provision charged to expense	732,000	(146,000)	576,000	408,000
Losses charged off	(1,295,000)	(7,000)	(1,295,000)	(83,000)
Recoveries		1,000	16,000	12,000
Real Estate Commercial [Member]
Allowance for loan losses:
Balance	4,380,000	3,053,000	2,725,000	3,125,000
Balance	2,498,000	3,887,000	2,498,000	3,887,000
Provision charged to expense	(1,403,000)	949,000	692,000	2,335,000
Losses charged off	(507,000)	(128,000)	(985,000)	(1,603,000)
Recoveries	28,000	13,000	66,000	30,000
One to Four Family Units [Member]
Allowance for loan losses:
Balance	1,574,000	2,156,000	1,735,000	1,713,000
Balance	1,312,000	1,543,000	1,312,000	1,543,000
Provision charged to expense	(251,000)	(7,000)	(309,000)	699,000
Losses charged off	(22,000)	(637,000)	(130,000)	(902,000)
Recoveries	11,000	31,000	16,000	33,000
Multi-Family Units [Member]
Allowance for loan losses:
Balance	415,000	522,000	390,000	528,000
Balance	279,000	381,000	279,000	381,000
Provision charged to expense	(136,000)	(141,000)	(111,000)	(147,000)
Commercial Loans [Member]
Allowance for loan losses:
Balance	3,997,000	2,270,000	1,948,000	2,483,000
Balance	1,438,000	2,175,000	1,438,000	2,175,000
Provision charged to expense	2,901,000	354,000	4,894,000	590,000
Losses charged off	(5,518,000)	(463,000)	(5,538,000)	(989,000)
Recoveries	58,000	14,000	134,000	91,000
Consumer and Other Loans [Member]
Allowance for loan losses:
Balance	357,000	470,000	372,000	687,000
Balance	293,000	309,000	293,000	309,000
Provision charged to expense	(59,000)	(46,000)	(58,000)	(1,463,000)
Losses charged off	(15,000)	(131,000)	(49,000)	(195,000)
Recoveries	10,000	16,000	28,000	1,280,000
Unallocated [Member]
Allowance for loan losses:
Balance	35,000	441,000	935,000
Balance	851,000	378,000	851,000	378,000
Provision charged to expense	$ 816,000	$ (63,000)	$ (84,000)	$ 378,000