Securities, Securities by Contractual Maturity (Details) - USD ($) $ in Thousands		Dec. 31, 2023	Jun. 30, 2023
Securities available-for-sale, Amortized Cost [Abstract]
Within one year		$ 163,173
After one year through five years		40,328
After five years through ten years		8,906
After ten years		1,500
Total securities available-for-sale		213,907
Mortgage-backed and asset-backed securities		118,730
Amortized cost	[1]	332,637	$ 309,153
Securities available-for-sale, Fair Value [Abstract]
Within one year		164,266
After one year through five years		37,375
After five years through ten years		7,342
After ten years		1,193
Total securities available-for-sale		210,176
Mortgage-backed and asset-backed securities		97,633
Fair value		307,809	281,133
Securities held-to-maturity, Amortized Cost [Abstract]
Within one year		59,515
After one year through five years		164,587
After five years through ten years		157,796
After ten years		138,613
Total securities held-to-maturity		520,511
Mortgage-backed securities		180,827
Amortized cost	[2]	701,338	726,363
Securities held-to-maturity, Fair Value [Abstract]
Within one year		59,094
After one year through five years		160,857
After five years through ten years		147,834
After ten years		122,852
Total securities held-to-maturity		490,637
Mortgage-backed securities		160,576
Fair value		651,213	$ 671,066
Total Debt Securities [Abstract]
Amortized cost		1,033,975
Fair value		$ 959,022

[1] Amortized cost excludes accrued interest receivable of $3.6 million and $2.9 million at December 31, 2023 and June 30, 2023, respectively, which is included in accrued interest receivable in the consolidated statements of financial condition.

[2] Amortized cost excludes accrued interest receivable of $4.5 million and $3.9 million at December 31, 2023 and June 30, 2023, respectively, which is included in accrued interest receivable in the consolidated statements of financial condition.