Note 11: Fair Value Measurements: Fair Value Inputs, Assets, Quantitative Information (Details) - Fair Value, Inputs, Level 3 - Foreclosed and Repossessed Assets - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Jun. 30, 2017
Fair Value Asset Liability Measured On Nonrecurring Basis With Unobservable Inputs	$ 3,724	$ 3,100
Third party appraisal
Fair Value Measurements Nonrecurring Valuation Technique	Third party appraisal	Third party appraisal
Third party appraisal | Marketability discount
Fair Value Measurements Nonrecurring Unobservable Inputs	Marketability discount	Marketability discount
Fair Value Measurements Nonrecurring Range of discounts Applied	0.0% - 66.4%	0.0% - 66.4%
Fair Value Measurements Nonrecurring Weighted Average Discount Applied	36.2%	40.6%