Note 3: Loans and Allowance For Loan Losses: Schedule of Financing Receivables NonAccrual Status (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
One To Four Family Residential Construction
Financing Receivable, Recorded Investment, Nonaccrual Status	$ 0	$ 0
Subdivision Construction
Financing Receivable, Recorded Investment, Nonaccrual Status	98	109
Land Development
Financing Receivable, Recorded Investment, Nonaccrual Status	0	1,718
Commercial Construction
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Owner Occupied One To Four Family Residential
Financing Receivable, Recorded Investment, Nonaccrual Status	904	1,125
Non-Owner Occupied One To Four Family Residential
Financing Receivable, Recorded Investment, Nonaccrual Status	1,758	404
Commercial Real Estate
Financing Receivable, Recorded Investment, Nonaccrual Status	1,226	2,727
Other Residential
Financing Receivable, Recorded Investment, Nonaccrual Status	1,877	162
Commercial Business
Financing Receivable, Recorded Investment, Nonaccrual Status	2,063	4,765
Industrial Revenue Bonds
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Automobile Loan
Financing Receivable, Recorded Investment, Nonaccrual Status	2,272	1,989
Consumer Loan
Financing Receivable, Recorded Investment, Nonaccrual Status	557	649
Home Equity Line of Credit
Financing Receivable, Recorded Investment, Nonaccrual Status	404	433
Loans Receivable Nonaccrual
Financing Receivable, Recorded Investment, Nonaccrual Status	$ 11,159	$ 14,081