Note 7: Loans and Allowance For Loan Losses: Financing Receivable Credit Quality Indicators (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Satisfactory | One- to four-family residential construction
Loan Portfolio Internal Grading System Classification	$ 38,953	$ 28,662
Satisfactory | Subdivision construction
Loan Portfolio Internal Grading System Classification	29,585	31,156
Satisfactory | Land development
Loan Portfolio Internal Grading System Classification	50,433	47,388
Satisfactory | Commercial construction
Loan Portfolio Internal Grading System Classification	143,043	150,515
Satisfactory | Owner occupied one- to four-family residential
Loan Portfolio Internal Grading System Classification	79,602	79,411
Satisfactory | Non-owner occupied one- to four-family residential
Loan Portfolio Internal Grading System Classification	136,021	132,073
Satisfactory | Commercial Real Estate
Loan Portfolio Internal Grading System Classification	636,611	619,387
Satisfactory | Other residential
Loan Portfolio Internal Grading System Classification	254,311	252,238
Satisfactory | Commercial business
Loan Portfolio Internal Grading System Classification	272,616	253,165
Satisfactory | Industrial revenue bonds
Loan Portfolio Internal Grading System Classification	46,064	40,977
Satisfactory | Consumer Loans Auto Financing Receivable
Loan Portfolio Internal Grading System Classification	90,856	82,467
Satisfactory | Consumer Other Financing Receivable
Loan Portfolio Internal Grading System Classification	82,910	83,250
Satisfactory | Home Equity
Loan Portfolio Internal Grading System Classification	52,008	52,076
Satisfactory | FDIC-supported loans, net of discounts (TeamBank)
Loan Portfolio Internal Grading System Classification	70,872	77,568
Satisfactory | FDIC-supported loans, net of discounts (Vantus Bank)
Loan Portfolio Internal Grading System Classification	86,937	95,281
Satisfactory | FDIC-supported loans, net of discounts (Sun Security Bank)
Loan Portfolio Internal Grading System Classification	80,538	91,519
Satisfactory | FDIC-supported loans, net of discounts (InterBank)
Loan Portfolio Internal Grading System Classification	248,786	259,210
Satisfactory | Loans Receivable
Loan Portfolio Internal Grading System Classification	2,400,146	2,376,343
Watch | Subdivision construction
Loan Portfolio Internal Grading System Classification	3,215	2,993
Watch | Land development
Loan Portfolio Internal Grading System Classification	3,395	3,887
Watch | Owner occupied one- to four-family residential
Loan Portfolio Internal Grading System Classification	502	792
Watch | Non-owner occupied one- to four-family residential
Loan Portfolio Internal Grading System Classification	4,223	7,884
Watch | Commercial Real Estate
Loan Portfolio Internal Grading System Classification	33,818	42,753
Watch | Other residential
Loan Portfolio Internal Grading System Classification	11,192	6,793
Watch | Commercial business
Loan Portfolio Internal Grading System Classification	3,529	4,286
Watch | Industrial revenue bonds
Loan Portfolio Internal Grading System Classification	675	675
Watch | Loans Receivable
Loan Portfolio Internal Grading System Classification	60,549	70,063
Special Mention | Home Equity
Loan Portfolio Internal Grading System Classification	2,076	1,913
Special Mention | Loans Receivable
Loan Portfolio Internal Grading System Classification	2,076	1,913
Substandard | One- to four-family residential construction
Loan Portfolio Internal Grading System Classification		409
Substandard | Subdivision construction
Loan Portfolio Internal Grading System Classification	1,576	1,656
Substandard | Land development
Loan Portfolio Internal Grading System Classification	9,450	11,284
Substandard | Owner occupied one- to four-family residential
Loan Portfolio Internal Grading System Classification	2,295	3,656
Substandard | Non-owner occupied one- to four-family residential
Loan Portfolio Internal Grading System Classification	4,308	5,501
Substandard | Commercial Real Estate
Loan Portfolio Internal Grading System Classification	28,992	30,237
Substandard | Other residential
Loan Portfolio Internal Grading System Classification	6,851	8,487
Substandard | Commercial business
Loan Portfolio Internal Grading System Classification	3,920	6,180
Substandard | Industrial revenue bonds
Loan Portfolio Internal Grading System Classification	2,029	2,110
Substandard | Consumer Loans Auto Financing Receivable
Loan Portfolio Internal Grading System Classification	103	143
Substandard | Consumer Other Financing Receivable
Loan Portfolio Internal Grading System Classification	464	565
Substandard | Home Equity
Loan Portfolio Internal Grading System Classification	329	236
Substandard | FDIC-supported loans, net of discounts (TeamBank)
Loan Portfolio Internal Grading System Classification	34	47
Substandard | FDIC-supported loans, net of discounts (Vantus Bank)
Loan Portfolio Internal Grading System Classification	204	202
Substandard | FDIC-supported loans, net of discounts (Sun Security Bank)
Loan Portfolio Internal Grading System Classification	626
Substandard | FDIC-supported loans, net of discounts (InterBank)
Loan Portfolio Internal Grading System Classification		22
Substandard | Loans Receivable
Loan Portfolio Internal Grading System Classification	61,181	70,735
Doubtful | Commercial business
Loan Portfolio Internal Grading System Classification	1,000	1,000
Doubtful | Loans Receivable
Loan Portfolio Internal Grading System Classification	1,000	1,000
Total for Portfolio | One- to four-family residential construction
Loan Portfolio Internal Grading System Classification	38,953	29,071
Total for Portfolio | Subdivision construction
Loan Portfolio Internal Grading System Classification	34,376	35,805
Total for Portfolio | Land development
Loan Portfolio Internal Grading System Classification	63,278	62,559
Total for Portfolio | Commercial construction
Loan Portfolio Internal Grading System Classification	143,043	150,515
Total for Portfolio | Owner occupied one- to four-family residential
Loan Portfolio Internal Grading System Classification	82,399	83,859
Total for Portfolio | Non-owner occupied one- to four-family residential
Loan Portfolio Internal Grading System Classification	144,552	145,458
Total for Portfolio | Commercial Real Estate
Loan Portfolio Internal Grading System Classification	699,421	692,377
Total for Portfolio | Other residential
Loan Portfolio Internal Grading System Classification	272,354	267,518
Total for Portfolio | Commercial business
Loan Portfolio Internal Grading System Classification	281,065	264,631
Total for Portfolio | Industrial revenue bonds
Loan Portfolio Internal Grading System Classification	48,768	43,762
Total for Portfolio | Consumer Loans Auto Financing Receivable
Loan Portfolio Internal Grading System Classification	90,959	82,610
Total for Portfolio | Consumer Other Financing Receivable
Loan Portfolio Internal Grading System Classification	83,374	83,815
Total for Portfolio | Home Equity
Loan Portfolio Internal Grading System Classification	54,413	54,225
Total for Portfolio | FDIC-supported loans, net of discounts (TeamBank)
Loan Portfolio Internal Grading System Classification	70,906	77,615
Total for Portfolio | FDIC-supported loans, net of discounts (Vantus Bank)
Loan Portfolio Internal Grading System Classification	87,141	95,483
Total for Portfolio | FDIC-supported loans, net of discounts (Sun Security Bank)
Loan Portfolio Internal Grading System Classification	81,164	91,519
Total for Portfolio | FDIC-supported loans, net of discounts (InterBank)
Loan Portfolio Internal Grading System Classification	248,786	259,232
Total for Portfolio | Loans Receivable
Loan Portfolio Internal Grading System Classification	$ 2,524,952	$ 2,520,054