Investment Securities - Investments with Unrealized Loss Positions for total investment securities (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Jun. 30, 2023
Investment Securities
Unrealized Holding Losses Less Than 12 Months, Fair Value	$ 546	$ 12,272
Unrealized Holding Losses Less Than 12 Months, Unrealized Losses	0	276
Unrealized Holding Losses 12 Months or More, Fair Value	110,203	125,386
Unrealized Holding Losses 12 Months or More, Unrealized Losses	15,751	18,582
Unrealized Holding Losses Total, Fair Value	110,749	137,658
Unrealized Holding Losses Total, Unrealized Losses	15,751	$ 18,858
Impairment on investment securities available for sale	$ 0