Note 15: Disclosures About Fair Value of Financial Instruments: Fair Value Measurement, Policy: Fair Value, Assets and Liabilities Measured on Nonrecurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Foreclosed Assets Held For Sale
Non-recurring Assets, Fair Value Disclosure	$ 343	$ 1,776
Loans Receivable Impaired
Non-recurring Assets, Fair Value Disclosure	1,212	2,805
Fair Value, Inputs, Level 1 | Foreclosed Assets Held For Sale
Non-recurring Assets, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 | 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 2 | Loans Receivable Impaired
Non-recurring Assets, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 | Foreclosed Assets Held For Sale
Non-recurring Assets, Fair Value Disclosure	343	1,776
Fair Value, Inputs, Level 3 | Loans Receivable Impaired
Non-recurring Assets, Fair Value Disclosure	$ 1,212	$ 2,805