Note 12: 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
	Dec. 31, 2019	Jun. 30, 2019
Fair Value Asset Liability Measured On Nonrecurring Basis With Unobservable Inputs	$ 553	$ 2,430
Third party appraisal
Fair Value Measurements, Valuation Processes, Description	Third party appraisal	Third party appraisal
Third party appraisal | Marketability discount
Unobservable Measurement Input, Uncertainty, Description	Marketability discount	Marketability discount
Fair Value Measurements Nonrecurring Range of discounts Applied	0.0% - 39.4%	5.1% - 77.0%
Fair Value Measurements Nonrecurring Weighted Average Discount Applied	11.2%	35.2%