Loans and Allowance For Loan Losses: Schedule of Classes of Loans by Aging (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
One- to four-family residential construction
Loans 30 to 59 Days Past Due		$ 2,082
Loans 60 to 89 Days Past Due		342
Loans Over 90 Days Past Due		186
Loans Total Past Due		2,610
Loans Current	27,183	21,366
Total Loans Receivable	27,183	23,976
Subdivision construction
Loans 30 to 59 Days Past Due	79	4,014
Loans 60 to 89 Days Past Due		388
Loans Over 90 Days Past Due	1,501	6,661
Loans Total Past Due	1,580	11,063
Loans Current	38,975	50,077
Total Loans Receivable	40,555	61,140
Land development
Loans 30 to 59 Days Past Due	12
Loans 60 to 89 Days Past Due		4
Loans Over 90 Days Past Due	2,514	2,655
Loans Total Past Due	2,526	2,659
Loans Current	66,007	66,112
Total Loans Receivable	68,533	68,771
Commercial construction
Loans Over 90 Days Past Due	1,691
Loans Total Past Due	1,691
Loans Current	100,949	119,589
Total Loans Receivable	102,640	119,589
Owner occupied one- to four-family residential
Loans 30 to 59 Days Past Due	509	833
Loans 60 to 89 Days Past Due	716
Loans Over 90 Days Past Due	2,080	3,888
Loans Total Past Due	3,305	4,721
Loans Current	86,576	87,273
Total Loans Receivable	89,881	91,994
Total Loans Greater Than 90 Days and Still Accruing	139	40
Non-owner occupied one- to four-family residential
Loans 30 to 59 Days Past Due	1,946	117
Loans Over 90 Days Past Due	4,600	3,425
Loans Total Past Due	6,546	3,542
Loans Current	141,478	142,239
Total Loans Receivable	148,024	145,781
Commercial real estate class
Loans 30 to 59 Days Past Due	11,576	6,323
Loans 60 to 89 Days Past Due	323	535
Loans Over 90 Days Past Due	1,640	6,204
Loans Total Past Due	13,539	13,062
Loans Current	606,484	626,795
Total Loans Receivable	620,023	639,857
Other residential
Loans Over 90 Days Past Due	2,950
Loans Total Past Due	2,950
Loans Current	283,126	243,742
Total Loans Receivable	286,076	243,742
Commercial business
Loans 30 to 59 Days Past Due	316	426
Loans 60 to 89 Days Past Due	379	10
Loans Over 90 Days Past Due	2,913	1,362
Loans Total Past Due	3,608	1,798
Loans Current	229,042	234,586
Total Loans Receivable	232,650	236,384
Industrial revenue bonds
Loans Over 90 Days Past Due	2,110	2,110
Loans Total Past Due	2,110	2,110
Loans Current	43,227	57,640
Total Loans Receivable	45,337	59,750
Consumer auto
Loans 30 to 59 Days Past Due	499	455
Loans 60 to 89 Days Past Due	23	56
Loans Over 90 Days Past Due	106	117
Loans Total Past Due	628	628
Loans Current	65,184	58,740
Total Loans Receivable	65,812	59,368
Total Loans Greater Than 90 Days and Still Accruing	4	10
Consumer other
Loans 30 to 59 Days Past Due	1,122	1,508
Loans 60 to 89 Days Past Due	380	641
Loans Over 90 Days Past Due	455	715
Loans Total Past Due	1,957	2,864
Loans Current	79,253	74,676
Total Loans Receivable	81,210	77,540
Total Loans Greater Than 90 Days and Still Accruing	161	356
Home equity lines of credit
Loans 30 to 59 Days Past Due	59	45
Loans 60 to 89 Days Past Due		29
Loans Over 90 Days Past Due	79	174
Loans Total Past Due	138	248
Loans Current	49,067	46,866
Total Loans Receivable	49,205	47,114
FDIC-supported loans, net of discounts (TeamBank)
Loans 30 to 59 Days Past Due	373	2,422
Loans 60 to 89 Days Past Due	83	862
Loans Over 90 Days Past Due	20,026	19,215
Loans Total Past Due	20,482	22,499
Loans Current	70,925	106,376
Total Loans Receivable	91,407	128,875
Total Loans Greater Than 90 Days and Still Accruing	8
FDIC-supported loans, net of discounts (Vantus Bank)
Loans 30 to 59 Days Past Due	495	562
Loans 60 to 89 Days Past Due	214	57
Loans Over 90 Days Past Due	9,224	5,999
Loans Total Past Due	9,933	6,618
Loans Current	97,552	116,418
Total Loans Receivable	107,485	123,036
Total Loans Greater Than 90 Days and Still Accruing	1	5
FDIC-supported loans, net of discounts (Sun Security Bank)
Loans 30 to 59 Days Past Due	5,508	5,628
Loans 60 to 89 Days Past Due	2,717	6,851
Loans Over 90 Days Past Due	30,360	40,299
Loans Total Past Due	38,585	52,778
Loans Current	71,893	91,848
Total Loans Receivable	110,478	144,626
Total Loans Greater Than 90 Days and Still Accruing	671	150
FDIC-supported loans, net of discounts (InterBank)
Loans 30 to 59 Days Past Due	2,365
Loans 60 to 89 Days Past Due	2,952
Loans Over 90 Days Past Due	16,705
Loans Total Past Due	22,022
Loans Current	254,954
Total Loans Receivable	276,976
Total including FDIC-supported loans, net of discount
Loans 30 to 59 Days Past Due	24,859	24,415
Loans 60 to 89 Days Past Due	7,787	9,775
Loans Over 90 Days Past Due	98,954	93,010
Loans Total Past Due	131,600	127,200
Loans Current	2,311,875	2,144,343
Total Loans Receivable	2,443,475	2,271,543
Total Loans Greater Than 90 Days and Still Accruing	984	561
Less FDIC-supported loans, net of discounts
Loans 30 to 59 Days Past Due	8,741	8,612
Loans 60 to 89 Days Past Due	5,966	7,770
Loans Over 90 Days Past Due	76,315	65,513
Loans Total Past Due	91,022	81,895
Loans Current	495,324	314,642
Total Loans Receivable	586,346	396,537
Total Loans Greater Than 90 Days and Still Accruing	680	155
Total loans by aging
Loans 30 to 59 Days Past Due	16,118	15,803
Loans 60 to 89 Days Past Due	1,821	2,005
Loans Over 90 Days Past Due	22,639	27,497
Loans Total Past Due	40,578	45,305
Loans Current	1,816,551	1,829,701
Total Loans Receivable	1,857,129	1,875,006
Total Loans Greater Than 90 Days and Still Accruing	$ 304	$ 406