NOTE 6: LOANS AND ALLOWANCE FOR LOAN LOSSES: Troubled Debt Restructurings on Financing Receivables (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Consumer
Troubled Debt Restructuring Loans Interest Only	$ 0	$ 0	$ 0	$ 0
Troubled Debt Restructuring Loans Modified Term	67	194	506	199
Troubled Debt Restructuring Loans Modified Combination	0	0	0	0
Troubled Debt Restructurings Total New Modifications	$ 67	194	506	199
Commercial Real Estate
Troubled Debt Restructuring Loans Interest Only		0		0
Troubled Debt Restructuring Loans Modified Term		0		0
Troubled Debt Restructuring Loans Modified Combination		5,759		5,759
Troubled Debt Restructurings Total New Modifications		5,759		5,759
Newly Restructured Modified Loans
Troubled Debt Restructuring Loans Interest Only		0	1,348	0
Troubled Debt Restructuring Loans Modified Term		194	506	199
Troubled Debt Restructuring Loans Modified Combination		5,759	0	6,033
Troubled Debt Restructurings Total New Modifications		$ 5,953	1,854	6,232
One-to-Four-Family Residential
Troubled Debt Restructuring Loans Interest Only			1,348
Troubled Debt Restructuring Loans Modified Term			0
Troubled Debt Restructuring Loans Modified Combination			0
Troubled Debt Restructurings Total New Modifications			$ 1,348
Commercial Business
Troubled Debt Restructuring Loans Interest Only				0
Troubled Debt Restructuring Loans Modified Term				0
Troubled Debt Restructuring Loans Modified Combination				274
Troubled Debt Restructurings Total New Modifications				$ 274