Securities, Securities by Contractual Maturity (Details) - USD ($) $ in Thousands		Sep. 30, 2023	Jun. 30, 2023
Securities available-for-sale, Amortized Cost [Abstract]
Within one year		$ 171,471
After one year through five years		38,162
After five years through ten years		11,089
After ten years		1,500
Total securities available-for-sale		222,222
Mortgage-backed and asset-backed securities		119,579
Amortized cost	[1]	341,801	$ 309,153
Securities available-for-sale, Fair Value [Abstract]
Within one year		172,049
After one year through five years		34,285
After five years through ten years		8,757
After ten years		1,149
Total securities available-for-sale		216,240
Mortgage-backed and asset-backed securities		92,476
Fair value		308,716	281,133
Securities held-to-maturity, Amortized Cost [Abstract]
Within one year		60,158
After one year through five years		167,354
After five years through ten years		149,902
After ten years		146,369
Total securities held-to-maturity		523,783
Mortgage-backed securities		188,431
Amortized cost	[2]	712,214	726,363
Securities held-to-maturity, Fair Value [Abstract]
Within one year		58,999
After one year through five years		158,761
After five years through ten years		133,552
After ten years		120,067
Total securities held-to-maturity		471,379
Mortgage-backed securities		160,784
Fair value		632,163	$ 671,066
Total Debt Securities [Abstract]
Amortized cost		1,054,015
Fair value		$ 940,879

[1] Amortized cost excludes accrued interest receivable of $3.1 million and $2.9 million at September 30, 2023 and June 30, 2023, respectively, which is included in accrued interest receivable in the consolidated statement of financial condition.

[2] Amortized cost excludes accrued interest receivable of $4.6 million and $3.9 million at September 30, 2023 and June 30, 2023, respectively, which is included in accrued interest receivable in the consolidated statement of financial condition.