Subordinated Debt (Details) - USD ($)	1 Months Ended				9 Months Ended	12 Months Ended
	Feb. 28, 2022	May 31, 2021	Aug. 31, 2014	Oct. 31, 2013	Mar. 31, 2024	Jun. 30, 2023
Subordinated debt					$ 23,143,000	$ 23,105,000
Investment, carrying value					480,000,000.0	464,200,000
Prepaid Expenses and Other Current Assets
Investment, face amount					505,000
Investment, carrying value					$ 467,000	464,000
Trust Preferred Securities
Number of years after securities became redeemable					5 years
Interest rate (as a percent)					8.34%
Subordinated debt					$ 7,200,000	7,200,000
Ozarks Legacy Community Financial, Inc.
Interest rate (as a percent)					8.04%
Assumed subordinated debt securities				$ 3,100,000
Ozarks Legacy Community Financial, Inc. | Reported Value Measurement
Assumed subordinated debt securities					$ 2,800,000	2,700,000
Peoples Service Company, Inc.
Interest rate (as a percent)					7.39%
Assumed subordinated debt securities			$ 6,500,000
Peoples Service Company, Inc. | Reported Value Measurement
Assumed subordinated debt securities					$ 5,500,000	5,500,000
Fortune | Subordinated notes Issued in May 2021
Interest rate (as a percent)		4.50%
Assumed subordinated debt securities	$ 7,500,000				$ 7,600,000	$ 7,700,000
Fortune | Subordinated notes Issued in May 2021 | Secured overnight financing rate
Variable rate (as a percent)		3.77%