Available for Sale Securities - Amortized Cost and Fair Value of Available-for-sale Securities, by Contractual Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Jun. 30, 2022
Amortized Cost
Within one year	$ 3,233
After one year but less than five years	24,395
After five years but less than ten years	59,286
After ten years	65,555
Total investment securities	152,469
Total AFS securities, Amortized Cost	445,616	$ 257,760
Estimated Fair Value
Within one year	3,221
After one year but less than five years	23,380
After five years but less than ten years	56,089
After ten years	64,612
Total investment securities	147,302
Available for sale securities (Note 2)	417,554	235,394
Debt and Equity Securities
Amortized Cost
Total AFS securities, Amortized Cost	152,469	68,687
Estimated Fair Value
Available for sale securities (Note 2)	147,302	64,809
Total MBS and CMOs
Amortized Cost
Total AFS securities, Amortized Cost	293,147	189,073
Estimated Fair Value
Available for sale securities (Note 2)	$ 270,252	$ 170,585