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	Sep. 30, 2024	Jun. 30, 2024
Debt Securities, Available-for-Sale [Line Items]
Total AFS securities, Amortized Cost	$ 433,716	$ 450,243
Gross Unrealized Gains	4,064	2,680
Gross Unrealized Losses	(17,571)	(25,020)
Allowance for Credit Losses	0	0
Estimated Fair Value	420,209	427,903
Obligations of states and political subdivisions
Debt Securities, Available-for-Sale [Line Items]
Total AFS securities, Amortized Cost	29,913	29,960
Gross Unrealized Gains	44	4
Gross Unrealized Losses	(1,527)	(2,211)
Allowance for Credit Losses	0	0
Estimated Fair Value	28,430	27,753
Corporate obligations
Debt Securities, Available-for-Sale [Line Items]
Total AFS securities, Amortized Cost	33,036	32,998
Gross Unrealized Gains	45	60
Gross Unrealized Losses	(1,291)	(1,781)
Allowance for Credit Losses	0	0
Estimated Fair Value	31,790	31,277
Asset backed securities
Debt Securities, Available-for-Sale [Line Items]
Total AFS securities, Amortized Cost	46,359	57,403
Gross Unrealized Gains	1,194	1,525
Gross Unrealized Losses	(213)	(249)
Allowance for Credit Losses	0	0
Estimated Fair Value	47,340	58,679
Other securities
Debt Securities, Available-for-Sale [Line Items]
Total AFS securities, Amortized Cost	5,191	5,387
Gross Unrealized Gains	21	20
Gross Unrealized Losses	(51)	(74)
Allowance for Credit Losses	0	0
Estimated Fair Value	5,161	5,333
Debt securities
Debt Securities, Available-for-Sale [Line Items]
Total AFS securities, Amortized Cost	114,499	125,748
Gross Unrealized Gains	1,304	1,609
Gross Unrealized Losses	(3,082)	(4,315)
Allowance for Credit Losses	0	0
Estimated Fair Value	112,721	123,042
Residential MBS issued by governmental sponsored enterprises (GSEs)
Debt Securities, Available-for-Sale [Line Items]
Total AFS securities, Amortized Cost	111,322	110,918
Gross Unrealized Gains	1,313	692
Gross Unrealized Losses	(4,756)	(6,855)
Allowance for Credit Losses	0	0
Estimated Fair Value	107,879	104,755
Commercial MBS issued by GSEs
Debt Securities, Available-for-Sale [Line Items]
Total AFS securities, Amortized Cost	65,071	65,195
Gross Unrealized Gains	940	297
Gross Unrealized Losses	(4,098)	(5,746)
Allowance for Credit Losses	0	0
Estimated Fair Value	61,913	59,746
CMOs issued by GSEs
Debt Securities, Available-for-Sale [Line Items]
Total AFS securities, Amortized Cost	142,824	148,382
Gross Unrealized Gains	507	82
Gross Unrealized Losses	(5,635)	(8,104)
Allowance for Credit Losses	0	0
Estimated Fair Value	137,696	140,360
MBS and CMOs
Debt Securities, Available-for-Sale [Line Items]
Total AFS securities, Amortized Cost	319,217	324,495
Gross Unrealized Gains	2,760	1,071
Gross Unrealized Losses	(14,489)	(20,705)
Allowance for Credit Losses	0	0
Estimated Fair Value	$ 307,488	$ 304,861