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, 2022	Jun. 30, 2021
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortzied Cost	$ 234,736	$ 203,286
Gross Unrealized Gains	795	4,875
Gross Unrealized Losses	(9,140)	(1,141)
Allowance for Credit Losses	0	0
Estimated Fair Value	226,391	207,020
US States and Political Subdivisions Debt Securities
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortzied Cost	45,420	46,257
Gross Unrealized Gains	409	1,479
Gross Unrealized Losses	(1,346)	(40)
Allowance for Credit Losses	0	0
Estimated Fair Value	44,483	47,696
Corporate Obligations
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortzied Cost	19,822	20,356
Gross Unrealized Gains	81	290
Gross Unrealized Losses	(503)	(335)
Allowance for Credit Losses	0	0
Estimated Fair Value	19,400	20,311
Other Debt Obligations
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortzied Cost	462	647
Gross Unrealized Gains		25
Gross Unrealized Losses	(17)
Allowance for Credit Losses	0	0
Estimated Fair Value	445	672
Debt and Equity Securities
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortzied Cost	65,704	67,260
Gross Unrealized Gains	490	1,794
Gross Unrealized Losses	(1,866)	(375)
Allowance for Credit Losses	0	0
Estimated Fair Value	64,328	68,679
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortzied Cost	68,354	64,400
Gross Unrealized Gains	50	932
Gross Unrealized Losses	(2,882)	(379)
Allowance for Credit Losses	0	0
Estimated Fair Value	65,522	64,953
Commercial MBS issued by GSEs
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortzied Cost	48,617	35,425
Gross Unrealized Gains	183	1,394
Gross Unrealized Losses	(2,394)	(338)
Allowance for Credit Losses	0	0
Estimated Fair Value	46,406	36,481
CMOs issued by GSEs
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortzied Cost	52,061	36,201
Gross Unrealized Gains	72	755
Gross Unrealized Losses	(1,998)	(49)
Allowance for Credit Losses	0	0
Estimated Fair Value	50,135	36,907
Total MBS and CMOs
Debt Securities, Available-for-sale [Line Items]
Total AFS securities, Amortzied Cost	169,032	136,026
Gross Unrealized Gains	305	3,081
Gross Unrealized Losses	(7,274)	(766)
Allowance for Credit Losses	0	0
Estimated Fair Value	$ 162,063	$ 138,341

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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