Note 15: Disclosures About Fair Value of Financial Instruments: Fair Value, Assets and Liabilities Measured on Nonrecurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Loans Receivable Impaired
Non-recurring Assets, Fair Value Disclosure	$ 2,710	$ 635
Foreclosed assets held for sale
Non-recurring Assets, Fair Value Disclosure	97	1,112
Fair Value, Inputs, Level 1 | Loans Receivable Impaired
Non-recurring Assets, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 | Foreclosed assets held for sale
Non-recurring Assets, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 | Loans Receivable Impaired
Non-recurring Assets, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 | Foreclosed assets held for sale
Non-recurring Assets, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 | Loans Receivable Impaired
Non-recurring Assets, Fair Value Disclosure	2,710	635
Fair Value, Inputs, Level 3 | Foreclosed assets held for sale
Non-recurring Assets, Fair Value Disclosure	$ 97	$ 1,112