Available for Sale Securities - Amortized Cost and Fair Value of Available-for-sale Securities, by Contractual Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Jun. 30, 2023
Amortized Cost
Within one year	$ 1,455
After one year but less than five years	25,465
After five years but less than ten years	59,624
After ten years	48,508
Total investment securities	135,052
Total AFS securities, Amortized Cost	458,069	$ 445,616
Estimated Fair Value
Within one year	1,438
After one year but less than five years	24,522
After five years but less than ten years	57,701
After ten years	48,663
Total investment securities	132,324
Total AFS securities	433,689	417,554
Total MBS and CMOs
Amortized Cost
Investment securities, without single maturity	323,017
Total AFS securities, Amortized Cost	323,017	293,147
Estimated Fair Value
Investment securities, without single maturity	301,365
Total AFS securities	$ 301,365	$ 270,252