Note 6: Loans and Allowance For Loan Losses: Troubled Debt Restructurings on Financing Receivables (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Commercial Business
Troubled Debt Restructuring Loans Modified Combination	$ 274
Troubled Debt Restructurings Total New Modifications	274
Total Newly Restructured Loans
Troubled Debt Restructuring Loans Interest Only		$ 3,435
Troubled Debt Restructuring Loans Modified Term		2
Troubled Debt Restructuring Loans Modified Combination	274
Troubled Debt Restructurings Total New Modifications	$ 274	3,437
One-to-Four-Family Residential | Mortgage Loan On Real Estate
Troubled Debt Restructuring Loans Interest Only		429
Troubled Debt Restructurings Total New Modifications		429
Commercial Real Estate
Troubled Debt Restructuring Loans Interest Only		60
Troubled Debt Restructurings Total New Modifications		60
Construction and Land Development | Mortgage Loan On Real Estate
Troubled Debt Restructuring Loans Interest Only		2,946
Troubled Debt Restructurings Total New Modifications		2,946
Consumer
Troubled Debt Restructuring Loans Modified Term		2
Troubled Debt Restructurings Total New Modifications		$ 2