Available for Sale Securities - Amortized cost, gross unrealized gains, gross unrealized losses, ACL, and approximate fair value of securities available for sale (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Jun. 30, 2024
Debt Securities, Available-for-Sale [Line Items]
Total AFS securities, Amortized Cost	$ 480,831	$ 450,243
Gross Unrealized Gains	2,547	2,680
Gross Unrealized Losses	(20,448)	(25,020)
Allowance for Credit Losses	0	0
Estimated Fair Value	462,930	427,903
Obligations of states and political subdivisions
Debt Securities, Available-for-Sale [Line Items]
Total AFS securities, Amortized Cost	27,313	29,960
Gross Unrealized Gains	4	4
Gross Unrealized Losses	(1,918)	(2,211)
Allowance for Credit Losses	0	0
Estimated Fair Value	25,399	27,753
Corporate obligations
Debt Securities, Available-for-Sale [Line Items]
Total AFS securities, Amortized Cost	33,119	32,998
Gross Unrealized Gains	93	60
Gross Unrealized Losses	(877)	(1,781)
Allowance for Credit Losses	0	0
Estimated Fair Value	32,335	31,277
Asset backed securities
Debt Securities, Available-for-Sale [Line Items]
Total AFS securities, Amortized Cost	38,240	57,403
Gross Unrealized Gains	745	1,525
Gross Unrealized Losses	(180)	(249)
Allowance for Credit Losses	0	0
Estimated Fair Value	38,805	58,679
Other securities
Debt Securities, Available-for-Sale [Line Items]
Total AFS securities, Amortized Cost	4,416	5,387
Gross Unrealized Gains	15	20
Gross Unrealized Losses	(66)	(74)
Allowance for Credit Losses	0	0
Estimated Fair Value	4,365	5,333
Debt securities
Debt Securities, Available-for-Sale [Line Items]
Total AFS securities, Amortized Cost	103,088	125,748
Gross Unrealized Gains	857	1,609
Gross Unrealized Losses	(3,041)	(4,315)
Allowance for Credit Losses	0	0
Estimated Fair Value	100,904	123,042
Residential MBS issued by governmental sponsored enterprises (GSEs)
Debt Securities, Available-for-Sale [Line Items]
Total AFS securities, Amortized Cost	134,178	110,918
Gross Unrealized Gains	1,110	692
Gross Unrealized Losses	(5,834)	(6,855)
Allowance for Credit Losses	0	0
Estimated Fair Value	129,454	104,755
Commercial MBS issued by GSEs
Debt Securities, Available-for-Sale [Line Items]
Total AFS securities, Amortized Cost	68,170	65,195
Gross Unrealized Gains	362	297
Gross Unrealized Losses	(4,820)	(5,746)
Allowance for Credit Losses	0	0
Estimated Fair Value	63,712	59,746
CMOs issued by GSEs
Debt Securities, Available-for-Sale [Line Items]
Total AFS securities, Amortized Cost	175,395	148,382
Gross Unrealized Gains	218	82
Gross Unrealized Losses	(6,753)	(8,104)
Allowance for Credit Losses	0	0
Estimated Fair Value	168,860	140,360
MBS and CMOs
Debt Securities, Available-for-Sale [Line Items]
Total AFS securities, Amortized Cost	377,743	324,495
Gross Unrealized Gains	1,690	1,071
Gross Unrealized Losses	(17,407)	(20,705)
Allowance for Credit Losses	0	0
Estimated Fair Value	$ 362,026	$ 304,861