Loans Held for Investment - Schedule of Gross Loans Held for Investment by Loan Types and Risk Category (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Jun. 30, 2025	Sep. 30, 2024
Investment in loans by risk categories by year of origination
Year 1	$ 84,832	$ 55,159
Year 2	77,815	82,598
Year 3	87,830	91,947
Year 4	287,292	290,746
Year 5	226,451	229,194
Prior	272,240	291,467
Revolving Loans	1,365	1,312
Total	1,037,825	1,042,423	$ 1,045,667
Mortgage loans \| Single-family
Investment in loans by risk categories by year of origination
Year 1	58,360	39,385
Year 2	50,919	55,276
Year 3	50,196	52,083
Year 4	192,418	194,501
Year 5	139,406	141,614
Prior	58,236	61,561
Revolving Loans		5
Total	549,535	544,425	524,235
Mortgage loans \| Single-family \| Pass
Investment in loans by risk categories by year of origination
Year 1	58,360	39,385
Year 2	50,919	55,276
Year 3	49,434	52,083
Year 4	192,418	194,501
Year 5	139,406	141,614
Prior	57,691	60,282
Revolving Loans		5
Total	548,228	543,146
Mortgage loans \| Single-family \| Special Mention
Investment in loans by risk categories by year of origination
Year 3	762
Prior		62
Total	762	62
Mortgage loans \| Single-family \| Substandard
Investment in loans by risk categories by year of origination
Prior	545	1,217
Total	545	1,217
Mortgage loans \| Multi-family
Investment in loans by risk categories by year of origination
Year 1	21,882	13,412
Year 2	21,622	21,687
Year 3	25,164	27,255
Year 4	72,265	73,495
Year 5	83,188	83,691
Prior	191,054	203,877
Total	415,175	423,417	435,782
Mortgage loans \| Multi-family \| Pass
Investment in loans by risk categories by year of origination
Year 1	21,882	13,412
Year 2	21,622	21,687
Year 3	23,332	27,255
Year 4	71,408	73,495
Year 5	82,724	83,224
Prior	189,470	201,660
Total	410,438	420,733
Mortgage loans \| Multi-family \| Substandard
Investment in loans by risk categories by year of origination
Year 3	1,832
Year 4	857
Year 5	464	467
Prior	1,584	2,217
Total	4,737	2,684
Mortgage loans \| Commercial real estate
Investment in loans by risk categories by year of origination
Year 1	4,144	2,149
Year 2	5,068	5,429
Year 3	12,470	12,609
Year 4	22,609	22,750
Year 5	3,857	3,889
Prior	22,862	25,940
Total	71,010	72,766	81,169
Mortgage loans \| Commercial real estate \| Pass
Investment in loans by risk categories by year of origination
Year 1	4,144	2,149
Year 2	5,068	5,429
Year 3	12,470	12,609
Year 4	22,609	22,750
Year 5	3,857	3,889
Prior	21,862	24,936
Total	70,010	71,762
Mortgage loans \| Commercial real estate \| Special Mention
Investment in loans by risk categories by year of origination
Prior	1,000	1,004
Total	1,000	1,004
Mortgage loans \| Construction
Investment in loans by risk categories by year of origination
Year 1	426	196
Year 2	206	206
Total	632	402	2,816
Mortgage loans \| Construction \| Pass
Investment in loans by risk categories by year of origination
Year 1	426	196
Year 2	206	206
Total	632	402
Mortgage loans \| Other
Investment in loans by risk categories by year of origination
Prior	88	89
Total	88	89	92
Mortgage loans \| Other \| Pass
Investment in loans by risk categories by year of origination
Prior	88	89
Total	88	89
Commercial business loans
Investment in loans by risk categories by year of origination
Revolving Loans	1,324	1,267
Total	1,324	1,267	1,510
Commercial business loans \| Pass
Investment in loans by risk categories by year of origination
Revolving Loans	1,324	1,267
Total	1,324	1,267
Consumer loans
Investment in loans by risk categories by year of origination
Year 1	20	17
Revolving Loans	41	40
Total	61	57	$ 63
Consumer loans \| Not graded
Investment in loans by risk categories by year of origination
Year 1	20	17
Total	20	17
Consumer loans \| Pass
Investment in loans by risk categories by year of origination
Revolving Loans	41	40
Total	$ 41	$ 40

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