Securities, Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Jun. 30, 2022
Available-for-sale Debt Securities, Amortized Cost [Abstract]
Within one year	$ 193,528
After one year through five years	27,017
After five years through ten years	20,703
After ten years	1,500
Total	242,748
Mortgage-backed securities	122,268
Amortized cost	365,016	$ 431,625
Available-for-sale Debt Securities, Fair Value [Abstract]
Within one year	193,814
After one year through five years	24,345
After five years through ten years	17,475
After ten years	1,157
Total	236,791
Mortgage-backed securities	98,327
Estimated fair value	335,118	408,062
Held-to-maturity Debt Securities, Amortized Cost [Abstract]
Within one year	59,578
After one year through five years	167,831
After five years through ten years	141,455
After ten years	173,976
Total	542,840
Mortgage-backed securities	199,630
Amortized cost	742,470	761,852
Held-to-maturity Debt Securities, Fair Value [Abstract]
Within one year	59,044
After one year through five years	163,465
After five years through ten years	133,712
After ten years	150,875
Total	507,096
Mortgage-backed securities	175,114
Estimated fair value	682,210	710,453
Total Debt Securities [Abstract]
Amortized cost	1,107,486	1,193,477
Estimated fair value	$ 1,017,328	$ 1,118,515