Note 11: Fair Value Measurements: Fair Value Option, Disclosures (Details) - Fair Value, Inputs, Level 3 - Foreclosed and repossessed assets - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020
Fair Value Asset Liability Measured On Nonrecurring Basis With Unobservable Inputs	$ 166	$ 2,211
Third party appraisal
Fair Value Measurements, Valuation Processes, Description	Third party appraisal	Third party appraisal
Third party appraisal | Marketable discount
Unobservable Measurement Input, Uncertainty, Description	Marketability discount	Marketability discount
Fair Value Measurements Nonrecurring Range of discounts Applied	24.5% - 60.4%	8.0% - 56.9%
Fair Value Measurements Nonrecurring Weighted Average Discount Applied	41.3%	15.7%