NOTE 6: LOANS AND ALLOWANCE FOR LOAN LOSSES: Troubled Debt Restructurings on Financing Receivables (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Consumer
Troubled Debt Restructuring Loans Interest Only	$ 0	$ 0	$ 0	$ 0
Troubled Debt Restructuring Loans Modified Term	287	5	439	5
Troubled Debt Restructuring Loans Modified Combination	0	0	0	0
Troubled Debt Restructurings Total New Modifications	$ 287	$ 5	439	5
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
Newly Restructured Modified Loans
Troubled Debt Restructuring Loans Interest Only			1,348	0
Troubled Debt Restructuring Loans Modified Term			439	5
Troubled Debt Restructuring Loans Modified Combination			0	274
Troubled Debt Restructurings Total New Modifications			$ 1,787	279
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