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, 2024	Jun. 30, 2023
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortized Cost	$ 458,069	$ 445,616
Gross Unrealized Gains	2,539	1,494
Gross Unrealized Losses	(26,919)	(29,556)
Allowance for Credit Losses	0	0
Estimated Fair Value	433,689	417,554
Obligations of states and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortized Cost	30,008	45,285
Gross Unrealized Gains	25	20
Gross Unrealized Losses	(1,925)	(2,737)
Allowance for Credit Losses	0	0
Estimated Fair Value	28,108	42,568
Corporate Obligations
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortized Cost	35,826	35,700
Gross Unrealized Gains	126	19
Gross Unrealized Losses	(2,139)	(3,181)
Allowance for Credit Losses	0	0
Estimated Fair Value	33,813	32,538
Asset backed securities
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortized Cost	63,561	67,897
Gross Unrealized Gains	1,514	1,274
Gross Unrealized Losses	(280)	(545)
Allowance for Credit Losses	0
Estimated Fair Value	64,795	68,626
Other securities
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortized Cost	5,657	3,587
Gross Unrealized Gains	21	39
Gross Unrealized Losses	(70)	(56)
Allowance for Credit Losses	0	0
Estimated Fair Value	5,608	3,570
Debt and Equity Securities
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortized Cost	135,052	152,469
Gross Unrealized Gains	1,686	1,352
Gross Unrealized Losses	(4,414)	(6,519)
Allowance for Credit Losses	0	0
Estimated Fair Value	132,324	147,302
Residential MBS issued by governmental sponsored enterprises (GSEs)
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortized Cost	107,807	97,612
Gross Unrealized Gains	645	122
Gross Unrealized Losses	(7,471)	(7,610)
Allowance for Credit Losses	0	0
Estimated Fair Value	100,981	90,124
Commercial MBS issued by GSEs
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortized Cost	65,311	60,333
Gross Unrealized Gains	150	11
Gross Unrealized Losses	(6,404)	(6,959)
Allowance for Credit Losses	0	0
Estimated Fair Value	59,057	53,385
CMOs issued by GSEs
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortized Cost	149,899	135,202
Gross Unrealized Gains	58	9
Gross Unrealized Losses	(8,630)	(8,468)
Allowance for Credit Losses	0	0
Estimated Fair Value	141,327	126,743
Total MBS and CMOs
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortized Cost	323,017	293,147
Gross Unrealized Gains	853	142
Gross Unrealized Losses	(22,505)	(23,037)
Allowance for Credit Losses	0	0
Estimated Fair Value	$ 301,365	$ 270,252