Available for Sale Securities - Amortized Cost and Fair Value of Available-for-sale Securities, by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023
Amortized Cost
Within one year	$ 2,465
After one year but less than five years	27,412
After five years but less than ten years	56,993
After ten years	63,201
Total investment securities	150,071
Total AFS securities, Amortized Cost	437,407	$ 445,616
Estimated Fair Value
Within one year	2,459
After one year but less than five years	26,235
After five years but less than ten years	53,581
After ten years	62,342
Total investment securities	144,617
Total AFS securities	405,198	417,554
Total MBS and CMOs
Amortized Cost
Investment securities, without single maturity	287,336
Total AFS securities, Amortized Cost	287,336	293,147
Estimated Fair Value
Investment securities, without single maturity	260,581
Total AFS securities	$ 260,581	$ 270,252