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, 2023	Jun. 30, 2022
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortized Cost	$ 445,616	$ 257,760
Gross Unrealized Gains	1,494	109
Gross Unrealized Losses	(29,556)	(22,475)
Allowance for Credit Losses	0	0
Estimated Fair Value	417,554	235,394
Obligations of states and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortized Cost	45,285	47,383
Gross Unrealized Gains	20	77
Gross Unrealized Losses	(2,737)	(2,981)
Allowance for Credit Losses	0	0
Estimated Fair Value	42,568	44,479
Corporate Obligations
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortized Cost	35,700	20,818
Gross Unrealized Gains	19	32
Gross Unrealized Losses	(3,181)	(963)
Allowance for Credit Losses	0	0
Estimated Fair Value	32,538	19,887
Asset backed securities
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortized Cost	67,897
Gross Unrealized Gains	1,274
Gross Unrealized Losses	(545)
Allowance for Credit Losses	0
Estimated Fair Value	68,626
Other securities
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortized Cost	3,587	486
Gross Unrealized Gains	39
Gross Unrealized Losses	(56)	(43)
Allowance for Credit Losses	0	0
Estimated Fair Value	3,570	443
Debt and Equity Securities
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortized Cost	152,469	68,687
Gross Unrealized Gains	1,352	109
Gross Unrealized Losses	(6,519)	(3,987)
Allowance for Credit Losses	0	0
Estimated Fair Value	147,302	64,809
Residential MBS issued by governmental sponsored enterprises (GSEs)
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortized Cost	97,612	76,345
Gross Unrealized Gains	122
Gross Unrealized Losses	(7,610)	(7,177)
Allowance for Credit Losses	0	0
Estimated Fair Value	90,124	69,168
Commercial MBS issued by GSEs
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortized Cost	60,333	51,435
Gross Unrealized Gains	11
Gross Unrealized Losses	(6,959)	(5,705)
Allowance for Credit Losses	0	0
Estimated Fair Value	53,385	45,730
CMOs issued by GSEs
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortized Cost	135,202	61,293
Gross Unrealized Gains	9
Gross Unrealized Losses	(8,468)	(5,606)
Allowance for Credit Losses	0	0
Estimated Fair Value	126,743	55,687
Total MBS and CMOs
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortized Cost	293,147	189,073
Gross Unrealized Gains	142
Gross Unrealized Losses	(23,037)	(18,488)
Allowance for Credit Losses	0	0
Estimated Fair Value	$ 270,252	$ 170,585