NOTE 6: LOANS AND ALLOWANCE FOR LOAN LOSSES: Financing Receivable, Troubled Debt Restructuring (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Consumer
Troubled Debt Restructuring Loans Interest Only	$ 0	$ 0	$ 0	$ 0
Troubled Debt Restructuring Loans Modified Term	52	287	79	439
Troubled Debt Restructuring Loans Modified Combination	0	0	0	0
Troubled Debt Restructurings Total New Modifications	$ 52	$ 287	$ 79	439
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
Troubled Debt Restructuring Loans Modified Term				439
Troubled Debt Restructuring Loans Modified Combination				0
Troubled Debt Restructurings Total New Modifications				$ 1,787