Loans Held for Investment - Schedule of Gross Loans Held for Investment by Loan Types and Risk Category (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Jun. 30, 2024	Sep. 30, 2023
Investment in loans by risk categories by year of origination
Year 1	$ 63,737	$ 35,227
Year 2	99,760	103,571
Year 3	303,616	306,108
Year 4	236,936	240,496
Year 5	82,596	86,089
Prior	257,584	278,060
Revolving Loans	1,438	1,295
Total	1,045,667	1,050,846	$ 1,070,468
Mortgage loans \| Single-family
Investment in loans by risk categories by year of origination
Year 1	41,843	19,476
Year 2	57,053	60,688
Year 3	203,838	205,817
Year 4	146,983	149,084
Year 5	17,315	19,606
Prior	57,192	63,406
Revolving Loans	11	14
Total	524,235	518,091	521,576
Mortgage loans \| Single-family \| Pass
Investment in loans by risk categories by year of origination
Year 1	41,843	19,476
Year 2	57,053	60,688
Year 3	203,838	205,817
Year 4	146,983	149,084
Year 5	17,315	19,606
Prior	55,137	59,702
Revolving Loans	11	14
Total	522,180	514,387
Mortgage loans \| Single-family \| Special Mention
Investment in loans by risk categories by year of origination
Prior		1,111
Total		1,111
Mortgage loans \| Single-family \| Substandard
Investment in loans by risk categories by year of origination
Prior	2,055	2,593
Total	2,055	2,593
Mortgage loans \| Multi-family
Investment in loans by risk categories by year of origination
Year 1	15,539	10,374
Year 2	28,819	28,892
Year 3	75,389	75,876
Year 4	85,969	87,394
Year 5	59,775	60,938
Prior	170,291	181,708
Total	435,782	445,182	457,351
Mortgage loans \| Multi-family \| Pass
Investment in loans by risk categories by year of origination
Year 1	15,539	10,374
Year 2	28,819	28,892
Year 3	75,389	75,876
Year 4	85,494	86,916
Year 5	59,775	60,938
Prior	168,609	180,119
Total	433,625	443,115
Mortgage loans \| Multi-family \| Special Mention
Investment in loans by risk categories by year of origination
Prior	635
Total	635
Mortgage loans \| Multi-family \| Substandard
Investment in loans by risk categories by year of origination
Year 4	475	478
Prior	1,047	1,589
Total	1,522	2,067
Mortgage loans \| Commercial real estate
Investment in loans by risk categories by year of origination
Year 1	4,853	3,874
Year 2	13,652	13,763
Year 3	23,165	23,298
Year 4	3,984	4,018
Year 5	5,414	5,450
Prior	30,101	32,946
Total	81,169	83,349	87,954
Mortgage loans \| Commercial real estate \| Pass
Investment in loans by risk categories by year of origination
Year 1	4,853	3,874
Year 2	13,234	13,763
Year 3	23,165	23,298
Year 4	3,984	4,018
Year 5	5,414	5,450
Prior	30,101	32,946
Total	80,751	83,349
Mortgage loans \| Commercial real estate \| Substandard
Investment in loans by risk categories by year of origination
Year 2	418
Total	418
Mortgage loans \| Construction
Investment in loans by risk categories by year of origination
Year 1	1,480	1,480
Year 2	236	228
Year 3	1,100	984
Total	2,816	2,692	2,100
Mortgage loans \| Construction \| Pass
Investment in loans by risk categories by year of origination
Year 1	1,480	1,480
Year 2	236	228
Year 3	1,100	984
Total	2,816	2,692
Mortgage loans \| Other
Investment in loans by risk categories by year of origination
Year 5	92	95
Total	92	95	104
Mortgage loans \| Other \| Pass
Investment in loans by risk categories by year of origination
Year 5	92	95
Total	92	95
Commercial business loans
Investment in loans by risk categories by year of origination
Year 3	124	133
Revolving Loans	1,386	1,239
Total	1,510	1,372	1,321
Commercial business loans \| Pass
Investment in loans by risk categories by year of origination
Year 3	124	133
Revolving Loans	1,386	1,239
Total	1,510	1,372
Consumer loans
Investment in loans by risk categories by year of origination
Year 1	22	23
Revolving Loans	41	42
Total	63	65	$ 62
Consumer loans \| Not graded
Investment in loans by risk categories by year of origination
Year 1	22	23
Total	22	23
Consumer loans \| Pass
Investment in loans by risk categories by year of origination
Revolving Loans	41	42
Total	$ 41	$ 42

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