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, 2023	Jun. 30, 2023
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortized Cost	$ 437,407	$ 445,616
Gross Unrealized Gains	1,638	1,494
Gross Unrealized Losses	(33,847)	(29,556)
Allowance for Credit Losses	0	0
Estimated Fair Value	405,198	417,554
Obligations of states and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortized Cost	44,905	45,285
Gross Unrealized Gains	2	20
Gross Unrealized Losses	(3,710)	(2,737)
Allowance for Credit Losses	0	0
Estimated Fair Value	41,197	42,568
Corporate Obligations
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortized Cost	35,740	35,700
Gross Unrealized Gains	36	19
Gross Unrealized Losses	(2,640)	(3,181)
Allowance for Credit Losses	0	0
Estimated Fair Value	33,136	32,538
Asset backed securities
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortized Cost	66,764	67,897
Gross Unrealized Gains	1,332	1,274
Gross Unrealized Losses	(454)	(545)
Allowance for Credit Losses	0
Estimated Fair Value	67,642	68,626
Other securities
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortized Cost	2,662	3,587
Gross Unrealized Gains	28	39
Gross Unrealized Losses	(48)	(56)
Allowance for Credit Losses	0	0
Estimated Fair Value	2,642	3,570
Debt and Equity Securities
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortized Cost	150,071	152,469
Gross Unrealized Gains	1,398	1,352
Gross Unrealized Losses	(6,852)	(6,519)
Allowance for Credit Losses	0	0
Estimated Fair Value	144,617	147,302
Residential MBS issued by governmental sponsored enterprises (GSEs)
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortized Cost	95,058	97,612
Gross Unrealized Gains	240	122
Gross Unrealized Losses	(8,905)	(7,610)
Allowance for Credit Losses	0	0
Estimated Fair Value	86,393	90,124
Commercial MBS issued by GSEs
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortized Cost	61,188	60,333
Gross Unrealized Gains		11
Gross Unrealized Losses	(8,123)	(6,959)
Allowance for Credit Losses	0	0
Estimated Fair Value	53,065	53,385
CMOs issued by GSEs
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortized Cost	131,090	135,202
Gross Unrealized Gains		9
Gross Unrealized Losses	(9,967)	(8,468)
Allowance for Credit Losses	0	0
Estimated Fair Value	121,123	126,743
Total MBS and CMOs
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortized Cost	287,336	293,147
Gross Unrealized Gains	240	142
Gross Unrealized Losses	(26,995)	(23,037)
Allowance for Credit Losses	0	0
Estimated Fair Value	$ 260,581	$ 270,252