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	Jun. 30, 2025	Jun. 30, 2024
Debt Securities, Available-for-Sale [Line Items]
Total AFS securities, Amortized Cost	$ 475,395	$ 450,243
Gross Unrealized Gains	3,128	2,680
Gross Unrealized Losses	(17,679)	(25,020)
Allowance for Credit Losses	0	0
Estimated Fair Value	460,844	427,903
Obligations of states and political subdivisions
Debt Securities, Available-for-Sale [Line Items]
Total AFS securities, Amortized Cost	26,030	29,960
Gross Unrealized Gains	5	4
Gross Unrealized Losses	(1,772)	(2,211)
Allowance for Credit Losses	0	0
Estimated Fair Value	24,263	27,753
Corporate obligations
Debt Securities, Available-for-Sale [Line Items]
Total AFS securities, Amortized Cost	31,199	32,998
Gross Unrealized Gains	75	60
Gross Unrealized Losses	(632)	(1,781)
Allowance for Credit Losses	0	0
Estimated Fair Value	30,642	31,277
Asset backed securities
Debt Securities, Available-for-Sale [Line Items]
Total AFS securities, Amortized Cost	42,059	57,403
Gross Unrealized Gains	567	1,525
Gross Unrealized Losses	(145)	(249)
Allowance for Credit Losses	0	0
Estimated Fair Value	42,481	58,679
Other securities
Debt Securities, Available-for-Sale [Line Items]
Total AFS securities, Amortized Cost	4,007	5,387
Gross Unrealized Gains	10	20
Gross Unrealized Losses	(53)	(74)
Allowance for Credit Losses	0	0
Estimated Fair Value	3,964	5,333
Debt securities
Debt Securities, Available-for-Sale [Line Items]
Total AFS securities, Amortized Cost	103,295	125,748
Gross Unrealized Gains	657	1,609
Gross Unrealized Losses	(2,602)	(4,315)
Allowance for Credit Losses	0	0
Estimated Fair Value	101,350	123,042
Residential MBS issued by governmental sponsored enterprises (GSEs)
Debt Securities, Available-for-Sale [Line Items]
Total AFS securities, Amortized Cost	138,377	110,918
Gross Unrealized Gains	1,623	692
Gross Unrealized Losses	(5,005)	(6,855)
Allowance for Credit Losses	0	0
Estimated Fair Value	134,995	104,755
Commercial MBS issued by GSEs
Debt Securities, Available-for-Sale [Line Items]
Total AFS securities, Amortized Cost	96,377	65,195
Gross Unrealized Gains	446	297
Gross Unrealized Losses	(4,821)	(5,746)
Allowance for Credit Losses	0	0
Estimated Fair Value	92,002	59,746
CMOs issued by GSEs
Debt Securities, Available-for-Sale [Line Items]
Total AFS securities, Amortized Cost	137,346	148,382
Gross Unrealized Gains	402	82
Gross Unrealized Losses	(5,251)	(8,104)
Allowance for Credit Losses	0	0
Estimated Fair Value	132,497	140,360
MBS and CMOs
Debt Securities, Available-for-Sale [Line Items]
Total AFS securities, Amortized Cost	372,100	324,495
Gross Unrealized Gains	2,471	1,071
Gross Unrealized Losses	(15,077)	(20,705)
Allowance for Credit Losses	0	0
Estimated Fair Value	$ 359,494	$ 304,861