Note 11: Subordinated Debt (Details) - USD ($) $ in Millions	1 Months Ended		3 Months Ended	12 Months Ended
	Aug. 31, 2014	Oct. 31, 2013	Mar. 31, 2020	Jun. 30, 2019
Ozarks Legacy Community Financial, Inc.
Assumed floating rate junior subordinated debt securities		$ 3.1
Ozarks Legacy Community Financial, Inc. | Reported Value Measurement
Assumed floating rate junior subordinated debt securities			$ 2.7	$ 2.6
Peoples Service Company, Inc.
Assumed floating rate junior subordinated debt securities	$ 6.5
Peoples Service Company, Inc. | Reported Value Measurement
Assumed floating rate junior subordinated debt securities			$ 5.2	$ 5.2