Investment Securities - Investments with Unrealized Loss Positions for total investment securities (Details) - USD ($)	Jun. 30, 2022	Jun. 30, 2021
Investment Securities
Unrealized Holding Losses Less Than 12 Months, Fair Value	$ 127,218,000	$ 84,600,000
Unrealized Holding Losses Less Than 12 Months, Unrealized Losses	9,183,000	810,000
Unrealized Holding Losses 12 Months or More, Fair Value	35,528,000	0
Unrealized Holding Losses 12 Months or More, Unrealized Losses	4,927,000	0
Unrealized Holding Losses Total, Fair Value	162,746,000	84,600,000
Unrealized Holding Losses Total, Unrealized Losses	$ 14,110,000	$ 810,000