Securities, Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Jun. 30, 2022
Securities available-for-sale, Amortized Cost [Abstract]
Within one year	$ 137,531
After one year through five years	34,138
After five years through ten years	15,382
After ten years	1,500
Total	188,551
Mortgage-backed and asset-backed securities	120,602
Amortized cost	309,153	$ 431,625
Securities available-for-sale, Fair Value [Abstract]
Within one year	138,195
After one year through five years	31,232
After five years through ten years	12,855
After ten years	1,164
Total	183,446
Mortgage-backed and asset-backed securities	97,687
Estimated fair value	281,133	408,062
Securities held-to-maturity, Amortized Cost [Abstract]
Within one year	67,112
After one year through five years	163,523
After five years through ten years	149,672
After ten years	153,824
Total	534,131
Mortgage-backed securities	192,232
Amortized cost	726,363	761,852
Securities held-to-maturity, Fair Value [Abstract]
Within one year	66,400
After one year through five years	158,774
After five years through ten years	140,416
After ten years	137,193
Total	502,783
Mortgage-backed securities	168,283
Estimated fair value	671,066	710,453
Total Debt Securities [Abstract]
Amortized cost	1,035,516	1,193,477
Estimated fair value	$ 952,199	$ 1,118,515