Securities, Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Jun. 30, 2022
Available-for-sale Debt Securities, Amortized Cost [Abstract]
Within one year	$ 171,917
After one year through five years	29,280
After five years through ten years	18,624
After ten years	1,500
Total	221,321
Mortgage-backed securities	121,448
Amortized cost	342,769	$ 431,625
Available-for-sale Debt Securities, Fair Value [Abstract]
Within one year	172,531
After one year through five years	27,014
After five years through ten years	15,995
After ten years	1,177
Total	216,717
Mortgage-backed securities	100,147
Estimated fair value	316,864	408,062
Held-to-maturity Debt Securities, Amortized Cost [Abstract]
Within one year	56,489
After one year through five years	169,883
After five years through ten years	142,164
After ten years	170,917
Total	539,453
Mortgage-backed securities	197,530
Amortized cost	736,983	761,852
Held-to-maturity Debt Securities, Fair Value [Abstract]
Within one year	56,054
After one year through five years	165,722
After five years through ten years	134,575
After ten years	153,387
Total	509,738
Mortgage-backed securities	176,155
Estimated fair value	685,893	710,453
Total Debt Securities [Abstract]
Amortized cost	1,079,752	1,193,477
Estimated fair value	$ 1,002,757	$ 1,118,515