Available for Sale Securities - Amortized Cost and Fair Value of Available-for-sale Securities, by Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Jun. 30, 2023
Amortized Cost
Within one year	$ 1,230
After one year but less than five years	25,637
After five years but less than ten years	60,602
After ten years	62,087
Total investment securities	149,556
Total AFS securities, Amortized Cost	441,462	$ 445,616
Estimated Fair Value
Within one year	1,229
After one year but less than five years	24,465
After five years but less than ten years	58,494
After ten years	61,842
Total investment securities	146,030
Total AFS securities	417,406	417,554
Total MBS and CMOs
Amortized Cost
Investment securities, without single maturity	291,906
Total AFS securities, Amortized Cost	291,906	293,147
Estimated Fair Value
Investment securities, without single maturity	271,376
Total AFS securities	$ 271,376	$ 270,252