Note 3: Loans and Allowance For Loan Losses: Loans Modified in Troubled Debt Restructurings by Segment (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Troubled Debt Restructurings Total Modifications	$ 21,100	$ 45,000	$ 47,600
Total Troubled Debt Restructurings Accruing Interest	$ 18,600	39,000	39,200
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0
Substandard
Troubled Debt Restructurings	$ 7,900	12,200	18,300
Construction And Land Development
Troubled Debt Restructurings Total Modifications	429
Troubled Debt Restructured Loans and Impaired	5,000	7,900	8,300
Single Family and Multi-Family Residential Mortgage Loans
Troubled Debt Restructured Loans and Impaired	7,400	13,500	13,800
Commercial Real Estate
Troubled Debt Restructured Loans and Impaired	7,100	21,300	23,300
Commercial Business
Troubled Debt Restructurings Total Modifications	38	1,095	1,150
Troubled Debt Restructured Loans and Impaired	1,300	2,000	1,900
Consumer Loan
Troubled Debt Restructurings Total Modifications	59	97	145
Troubled Debt Restructured Loans and Impaired	$ 295	$ 311	$ 324