Note 3: Loans and Allowance For Loan Losses: Financing Receivable Credit Quality Indicators (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Satisfactory | One To Four Family Residential Construction
Loan Portfolio Internal Grading System Classification	$ 20,275	$ 20,771
Satisfactory | Subdivision Construction
Loan Portfolio Internal Grading System Classification	15,602	14,059
Satisfactory | Land Development
Loan Portfolio Internal Grading System Classification	39,171	39,925
Satisfactory | Commercial Construction
Loan Portfolio Internal Grading System Classification	1,068,352	780,614
Satisfactory | Owner Occupied One To Four Family Residential
Loan Portfolio Internal Grading System Classification	188,706	198,835
Satisfactory | Non-Owner Occupied One To Four Family Residential
Loan Portfolio Internal Grading System Classification	117,103	135,930
Satisfactory | Commercial Real Estate
Loan Portfolio Internal Grading System Classification	1,218,431	1,160,280
Satisfactory | Other Residential
Loan Portfolio Internal Grading System Classification	742,237	658,846
Satisfactory | Commercial Business
Loan Portfolio Internal Grading System Classification	344,479	342,685
Satisfactory | Industrial Revenue Bonds
Loan Portfolio Internal Grading System Classification	21,859	25,065
Satisfactory | Automobile Loan
Loan Portfolio Internal Grading System Classification	354,588	492,165
Satisfactory | Consumer Loan
Loan Portfolio Internal Grading System Classification	62,682	69,338
Satisfactory | Home Equity Line of Credit
Loan Portfolio Internal Grading System Classification	114,860	108,290
Satisfactory | Acquired foreclosed assets no longer covered by FDIC loss sharing agreements, net of discounts
Loan Portfolio Internal Grading System Classification	155,212	72,552
Satisfactory | Acquired Non-Covered Loans Net Of Discounts
Loan Portfolio Internal Grading System Classification	54,445	76,234
Satisfactory | Loans Receivable
Loan Portfolio Internal Grading System Classification	4,518,002	4,329,945
Satisfactory | Acquired FDIC Covered Loans Net of Discount
Loan Portfolio Internal Grading System Classification		134,356
Watch | One To Four Family Residential Construction
Loan Portfolio Internal Grading System Classification	518	966
Watch | Subdivision Construction
Loan Portfolio Internal Grading System Classification	2,362	2,729
Watch | Land Development
Loan Portfolio Internal Grading System Classification	4,800	5,140
Watch | Commercial Construction
Loan Portfolio Internal Grading System Classification	0	0
Watch | Owner Occupied One To Four Family Residential
Loan Portfolio Internal Grading System Classification	0	67
Watch | Non-Owner Occupied One To Four Family Residential
Loan Portfolio Internal Grading System Classification	389	465
Watch | Commercial Real Estate
Loan Portfolio Internal Grading System Classification	9,909	20,154
Watch | Other Residential
Loan Portfolio Internal Grading System Classification	1,532	4,370
Watch | Commercial Business
Loan Portfolio Internal Grading System Classification	6,306	2,651
Watch | Industrial Revenue Bonds
Loan Portfolio Internal Grading System Classification	0	0
Watch | Automobile Loan
Loan Portfolio Internal Grading System Classification	0	0
Watch | Consumer Loan
Loan Portfolio Internal Grading System Classification	0	0
Watch | Home Equity Line of Credit
Loan Portfolio Internal Grading System Classification	0	0
Watch | Acquired foreclosed assets no longer covered by FDIC loss sharing agreements, net of discounts
Loan Portfolio Internal Grading System Classification	0	0
Watch | Acquired Non-Covered Loans Net Of Discounts
Loan Portfolio Internal Grading System Classification	0	0
Watch | Loans Receivable
Loan Portfolio Internal Grading System Classification	25,816	36,542
Watch | Acquired FDIC Covered Loans Net of Discount
Loan Portfolio Internal Grading System Classification		0
Special Mention | One To Four Family Residential Construction
Loan Portfolio Internal Grading System Classification	0	0
Special Mention | Subdivision Construction
Loan Portfolio Internal Grading System Classification	0	0
Special Mention | Land Development
Loan Portfolio Internal Grading System Classification	0	0
Special Mention | Commercial Construction
Loan Portfolio Internal Grading System Classification	0	0
Special Mention | Owner Occupied One To Four Family Residential
Loan Portfolio Internal Grading System Classification	0	0
Special Mention | Non-Owner Occupied One To Four Family Residential
Loan Portfolio Internal Grading System Classification	0	0
Special Mention | Commercial Real Estate
Loan Portfolio Internal Grading System Classification	0	0
Special Mention | Other Residential
Loan Portfolio Internal Grading System Classification	0	0
Special Mention | Commercial Business
Loan Portfolio Internal Grading System Classification	0	0
Special Mention | Industrial Revenue Bonds
Loan Portfolio Internal Grading System Classification	0	0
Special Mention | Automobile Loan
Loan Portfolio Internal Grading System Classification	0	0
Special Mention | Consumer Loan
Loan Portfolio Internal Grading System Classification	0	0
Special Mention | Home Equity Line of Credit
Loan Portfolio Internal Grading System Classification	0	0
Special Mention | Acquired foreclosed assets no longer covered by FDIC loss sharing agreements, net of discounts
Loan Portfolio Internal Grading System Classification	0	0
Special Mention | Acquired Non-Covered Loans Net Of Discounts
Loan Portfolio Internal Grading System Classification	0	0
Special Mention | Loans Receivable
Loan Portfolio Internal Grading System Classification	0	0
Special Mention | Acquired FDIC Covered Loans Net of Discount
Loan Portfolio Internal Grading System Classification		0
Substandard | One To Four Family Residential Construction
Loan Portfolio Internal Grading System Classification	0	0
Substandard | Subdivision Construction
Loan Portfolio Internal Grading System Classification	98	398
Substandard | Land Development
Loan Portfolio Internal Grading System Classification	0	5,559
Substandard | Commercial Construction
Loan Portfolio Internal Grading System Classification	0	0
Substandard | Owner Occupied One To Four Family Residential
Loan Portfolio Internal Grading System Classification	1,809	1,438
Substandard | Non-Owner Occupied One To Four Family Residential
Loan Portfolio Internal Grading System Classification	1,976	529
Substandard | Commercial Real Estate
Loan Portfolio Internal Grading System Classification	6,989	6,472
Substandard | Other Residential
Loan Portfolio Internal Grading System Classification	1,876	162
Substandard | Commercial Business
Loan Portfolio Internal Grading System Classification	2,066	3,292
Substandard | Industrial Revenue Bonds
Loan Portfolio Internal Grading System Classification	0	0
Substandard | Automobile Loan
Loan Portfolio Internal Grading System Classification	2,554	2,068
Substandard | Consumer Loan
Loan Portfolio Internal Grading System Classification	686	663
Substandard | Home Equity Line of Credit
Loan Portfolio Internal Grading System Classification	579	463
Substandard | Acquired foreclosed assets no longer covered by FDIC loss sharing agreements, net of discounts
Loan Portfolio Internal Grading System Classification	12	17
Substandard | Acquired Non-Covered Loans Net Of Discounts
Loan Portfolio Internal Grading System Classification	0	0
Substandard | Loans Receivable
Loan Portfolio Internal Grading System Classification	18,645	21,061
Substandard | Acquired FDIC Covered Loans Net of Discount
Loan Portfolio Internal Grading System Classification		0
Doubtful | One To Four Family Residential Construction
Loan Portfolio Internal Grading System Classification	0	0
Doubtful | Subdivision Construction
Loan Portfolio Internal Grading System Classification	0	0
Doubtful | Land Development
Loan Portfolio Internal Grading System Classification	0	0
Doubtful | Commercial Construction
Loan Portfolio Internal Grading System Classification	0	0
Doubtful | Owner Occupied One To Four Family Residential
Loan Portfolio Internal Grading System Classification	0	0
Doubtful | Non-Owner Occupied One To Four Family Residential
Loan Portfolio Internal Grading System Classification	0	0
Doubtful | Commercial Real Estate
Loan Portfolio Internal Grading System Classification	0	0
Doubtful | Other Residential
Loan Portfolio Internal Grading System Classification	0	0
Doubtful | Commercial Business
Loan Portfolio Internal Grading System Classification	500	0
Doubtful | Industrial Revenue Bonds
Loan Portfolio Internal Grading System Classification	0	0
Doubtful | Automobile Loan
Loan Portfolio Internal Grading System Classification	0	0
Doubtful | Consumer Loan
Loan Portfolio Internal Grading System Classification	0	0
Doubtful | Home Equity Line of Credit
Loan Portfolio Internal Grading System Classification	0	0
Doubtful | Acquired foreclosed assets no longer covered by FDIC loss sharing agreements, net of discounts
Loan Portfolio Internal Grading System Classification	0	0
Doubtful | Acquired Non-Covered Loans Net Of Discounts
Loan Portfolio Internal Grading System Classification	0	0
Doubtful | Loans Receivable
Loan Portfolio Internal Grading System Classification	500	0
Doubtful | Acquired FDIC Covered Loans Net of Discount
Loan Portfolio Internal Grading System Classification		0
Total Credit Quality Indicator | One To Four Family Residential Construction
Loan Portfolio Internal Grading System Classification	20,793	21,737
Total Credit Quality Indicator | Subdivision Construction
Loan Portfolio Internal Grading System Classification	18,062	17,186
Total Credit Quality Indicator | Land Development
Loan Portfolio Internal Grading System Classification	43,971	50,624
Total Credit Quality Indicator | Commercial Construction
Loan Portfolio Internal Grading System Classification	1,068,352	780,614
Total Credit Quality Indicator | Owner Occupied One To Four Family Residential
Loan Portfolio Internal Grading System Classification	190,515	200,340
Total Credit Quality Indicator | Non-Owner Occupied One To Four Family Residential
Loan Portfolio Internal Grading System Classification	119,468	136,924
Total Credit Quality Indicator | Commercial Real Estate
Loan Portfolio Internal Grading System Classification	1,235,329	1,186,906
Total Credit Quality Indicator | Other Residential
Loan Portfolio Internal Grading System Classification	745,645	663,378
Total Credit Quality Indicator | Commercial Business
Loan Portfolio Internal Grading System Classification	353,351	348,628
Total Credit Quality Indicator | Industrial Revenue Bonds
Loan Portfolio Internal Grading System Classification	21,859	25,065
Total Credit Quality Indicator | Automobile Loan
Loan Portfolio Internal Grading System Classification	357,142	494,233
Total Credit Quality Indicator | Consumer Loan
Loan Portfolio Internal Grading System Classification	63,368	70,001
Total Credit Quality Indicator | Home Equity Line of Credit
Loan Portfolio Internal Grading System Classification	115,439	108,753
Total Credit Quality Indicator | Acquired foreclosed assets no longer covered by FDIC loss sharing agreements, net of discounts
Loan Portfolio Internal Grading System Classification	155,224	72,569
Total Credit Quality Indicator | Acquired Non-Covered Loans Net Of Discounts
Loan Portfolio Internal Grading System Classification	54,445	76,234
Total Credit Quality Indicator | Loans Receivable
Loan Portfolio Internal Grading System Classification	$ 4,562,963	4,387,548
Total Credit Quality Indicator | Acquired FDIC Covered Loans Net of Discount
Loan Portfolio Internal Grading System Classification		$ 134,356