Loans Held for Investment - Schedule of commercial real estate loans by geographic concentration (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Jun. 30, 2023
Loans Held for Investment
Total commercial real estate	$ 1,050,846
Total commercial real estate		$ 1,074,164
Mortgage loans
Loans Held for Investment
Total commercial real estate	83,349
Total commercial real estate		90,558
Mortgage loans | Office
Loans Held for Investment
Total commercial real estate	26,774
Total commercial real estate		33,198
Mortgage loans | Mixed use
Loans Held for Investment
Total commercial real estate	16,090
Total commercial real estate		17,920
Mortgage loans | Retail
Loans Held for Investment
Total commercial real estate	12,501
Total commercial real estate		12,991
Mortgage loans | Warehouse
Loans Held for Investment
Total commercial real estate	11,924
Total commercial real estate		10,644
Mortgage loans | Medical/dental office
Loans Held for Investment
Total commercial real estate	7,084
Total commercial real estate		6,641
Mortgage loans | Mobile home park
Loans Held for Investment
Total commercial real estate	6,909
Total commercial real estate		7,057
Mortgage loans | Restaurant/Fast Food
Loans Held for Investment
Total commercial real estate	1,190
Total commercial real estate		1,014
Mortgage loans | Automotive - non gasoline
Loans Held for Investment
Total commercial real estate	578
Total commercial real estate		485
Mortgage loans | Live/work
Loans Held for Investment
Total commercial real estate	299
Total commercial real estate		337
Mortgage loans | Light industrial/manufacturing
Loans Held for Investment
Total commercial real estate		271
Mortgage loans | Commercial real estate
Loans Held for Investment
Total commercial real estate	$ 83,349
Total commercial real estate		$ 90,558
Percentage of commercial real estate loan	100.00%	100.00%
Mortgage loans | Commercial real estate | Inland empire
Loans Held for Investment
Total commercial real estate	$ 13,583
Total commercial real estate		$ 16,586
Percentage of commercial real estate loan	16.00%	18.00%
Mortgage loans | Commercial real estate | Southern California
Loans Held for Investment
Total commercial real estate	$ 44,574
Total commercial real estate		$ 49,183
Percentage of commercial real estate loan	54.00%	54.00%
Mortgage loans | Commercial real estate | Other California
Loans Held for Investment
Total commercial real estate	$ 25,192
Total commercial real estate		$ 24,789
Percentage of commercial real estate loan	30.00%	28.00%
Mortgage loans | Owner Occupied Loan Balance
Loans Held for Investment
Total commercial real estate	$ 12,188
Total commercial real estate		$ 12,839
Percentage of commercial real estate loan	100.00%	100.00%
Mortgage loans | Owner Occupied Loan Balance | Inland empire
Loans Held for Investment
Total commercial real estate	$ 1,816
Total commercial real estate		$ 2,930
Percentage of commercial real estate loan	15.00%	23.00%
Mortgage loans | Owner Occupied Loan Balance | Southern California
Loans Held for Investment
Total commercial real estate	$ 9,129
Total commercial real estate		$ 8,622
Percentage of commercial real estate loan	75.00%	67.00%
Mortgage loans | Owner Occupied Loan Balance | Other California
Loans Held for Investment
Total commercial real estate	$ 1,243
Total commercial real estate		$ 1,287
Percentage of commercial real estate loan	10.00%	10.00%
Mortgage loans | Owner Occupied Loan Balance | Office
Loans Held for Investment
Total commercial real estate	$ 6,690
Total commercial real estate		$ 9,283
Percentage of commercial real estate loan	100.00%	100.00%
Mortgage loans | Owner Occupied Loan Balance | Office | Inland empire
Loans Held for Investment
Total commercial real estate	$ 1,540
Total commercial real estate		$ 2,649
Percentage of commercial real estate loan	23.00%	29.00%
Mortgage loans | Owner Occupied Loan Balance | Office | Southern California
Loans Held for Investment
Total commercial real estate	$ 4,959
Total commercial real estate		$ 6,436
Percentage of commercial real estate loan	74.00%	69.00%
Mortgage loans | Owner Occupied Loan Balance | Office | Other California
Loans Held for Investment
Total commercial real estate	$ 191
Total commercial real estate		$ 198
Percentage of commercial real estate loan	3.00%	2.00%
Mortgage loans | Owner Occupied Loan Balance | Mixed use
Loans Held for Investment
Total commercial real estate	$ 293
Total commercial real estate		$ 306
Percentage of commercial real estate loan	100.00%	100.00%
Mortgage loans | Owner Occupied Loan Balance | Mixed use | Other California
Loans Held for Investment
Total commercial real estate	$ 293
Total commercial real estate		$ 306
Percentage of commercial real estate loan	100.00%	100.00%
Mortgage loans | Owner Occupied Loan Balance | Warehouse
Loans Held for Investment
Total commercial real estate	$ 2,076
Total commercial real estate		$ 2,133
Percentage of commercial real estate loan	100.00%	100.00%
Mortgage loans | Owner Occupied Loan Balance | Warehouse | Southern California
Loans Held for Investment
Total commercial real estate	$ 1,689
Total commercial real estate		$ 1,733
Percentage of commercial real estate loan	81.00%	81.00%
Mortgage loans | Owner Occupied Loan Balance | Warehouse | Other California
Loans Held for Investment
Total commercial real estate	$ 387
Total commercial real estate		$ 400
Percentage of commercial real estate loan	19.00%	19.00%
Mortgage loans | Owner Occupied Loan Balance | Medical/dental office
Loans Held for Investment
Total commercial real estate	$ 2,439
Total commercial real estate		$ 1,117
Percentage of commercial real estate loan	100.00%	100.00%
Mortgage loans | Owner Occupied Loan Balance | Medical/dental office | Inland empire
Loans Held for Investment
Total commercial real estate	$ 276
Total commercial real estate		$ 281
Percentage of commercial real estate loan	11.00%	25.00%
Mortgage loans | Owner Occupied Loan Balance | Medical/dental office | Southern California
Loans Held for Investment
Total commercial real estate	$ 1,791
Total commercial real estate		$ 453
Percentage of commercial real estate loan	74.00%	41.00%
Mortgage loans | Owner Occupied Loan Balance | Medical/dental office | Other California
Loans Held for Investment
Total commercial real estate	$ 372
Total commercial real estate		$ 383
Percentage of commercial real estate loan	15.00%	34.00%
Mortgage loans | Owner Occupied Loan Balance | Restaurant/Fast Food
Loans Held for Investment
Total commercial real estate	$ 690
Percentage of commercial real estate loan	100.00%
Mortgage loans | Owner Occupied Loan Balance | Restaurant/Fast Food | Southern California
Loans Held for Investment
Total commercial real estate	$ 690
Percentage of commercial real estate loan	100.00%
Mortgage loans | Non Owner Occupied Loan Balance
Loans Held for Investment
Total commercial real estate	$ 71,161
Total commercial real estate		$ 77,719
Percentage of commercial real estate loan	100.00%	100.00%
Mortgage loans | Non Owner Occupied Loan Balance | Inland empire
Loans Held for Investment
Total commercial real estate	$ 11,767
Total commercial real estate		$ 13,656
Percentage of commercial real estate loan	16.00%	18.00%
Mortgage loans | Non Owner Occupied Loan Balance | Southern California
Loans Held for Investment
Total commercial real estate	$ 35,445
Total commercial real estate		$ 40,561
Percentage of commercial real estate loan	50.00%	52.00%
Mortgage loans | Non Owner Occupied Loan Balance | Other California
Loans Held for Investment
Total commercial real estate	$ 23,949
Total commercial real estate		$ 23,502
Percentage of commercial real estate loan	34.00%	30.00%
Mortgage loans | Non Owner Occupied Loan Balance | Office
Loans Held for Investment
Total commercial real estate	$ 20,084
Total commercial real estate		$ 23,915
Percentage of commercial real estate loan	100.00%	100.00%
Mortgage loans | Non Owner Occupied Loan Balance | Office | Inland empire
Loans Held for Investment
Total commercial real estate	$ 2,951
Total commercial real estate		$ 4,420
Percentage of commercial real estate loan	15.00%	18.00%
Mortgage loans | Non Owner Occupied Loan Balance | Office | Southern California
Loans Held for Investment
Total commercial real estate	$ 13,837
Total commercial real estate		$ 14,767
Percentage of commercial real estate loan	69.00%	62.00%
Mortgage loans | Non Owner Occupied Loan Balance | Office | Other California
Loans Held for Investment
Total commercial real estate	$ 3,296
Total commercial real estate		$ 4,728
Percentage of commercial real estate loan	16.00%	20.00%
Mortgage loans | Non Owner Occupied Loan Balance | Mixed use
Loans Held for Investment
Total commercial real estate	$ 15,797
Total commercial real estate		$ 17,614
Percentage of commercial real estate loan	100.00%	100.00%
Mortgage loans | Non Owner Occupied Loan Balance | Mixed use | Inland empire
Loans Held for Investment
Total commercial real estate	$ 505
Total commercial real estate		$ 660
Percentage of commercial real estate loan	3.00%	4.00%
Mortgage loans | Non Owner Occupied Loan Balance | Mixed use | Southern California
Loans Held for Investment
Total commercial real estate	$ 6,243
Total commercial real estate		$ 7,292
Percentage of commercial real estate loan	40.00%	41.00%
Mortgage loans | Non Owner Occupied Loan Balance | Mixed use | Other California
Loans Held for Investment
Total commercial real estate	$ 9,049
Total commercial real estate		$ 9,662
Percentage of commercial real estate loan	57.00%	55.00%
Mortgage loans | Non Owner Occupied Loan Balance | Retail
Loans Held for Investment
Total commercial real estate	$ 12,501
Total commercial real estate		$ 12,991
Percentage of commercial real estate loan	100.00%	100.00%
Mortgage loans | Non Owner Occupied Loan Balance | Retail | Inland empire
Loans Held for Investment
Total commercial real estate	$ 1,050
Total commercial real estate		$ 1,076
Percentage of commercial real estate loan	8.00%	8.00%
Mortgage loans | Non Owner Occupied Loan Balance | Retail | Southern California
Loans Held for Investment
Total commercial real estate	$ 6,996
Total commercial real estate		$ 7,353
Percentage of commercial real estate loan	56.00%	57.00%
Mortgage loans | Non Owner Occupied Loan Balance | Retail | Other California
Loans Held for Investment
Total commercial real estate	$ 4,455
Total commercial real estate		$ 4,562
Percentage of commercial real estate loan	36.00%	35.00%
Mortgage loans | Non Owner Occupied Loan Balance | Warehouse
Loans Held for Investment
Total commercial real estate	$ 9,848
Total commercial real estate		$ 8,511
Percentage of commercial real estate loan	100.00%	100.00%
Mortgage loans | Non Owner Occupied Loan Balance | Warehouse | Inland empire
Loans Held for Investment
Total commercial real estate	$ 605
Total commercial real estate		$ 623
Percentage of commercial real estate loan	6.00%	7.00%
Mortgage loans | Non Owner Occupied Loan Balance | Warehouse | Southern California
Loans Held for Investment
Total commercial real estate	$ 4,774
Total commercial real estate		$ 5,690
Percentage of commercial real estate loan	49.00%	67.00%
Mortgage loans | Non Owner Occupied Loan Balance | Warehouse | Other California
Loans Held for Investment
Total commercial real estate	$ 4,469
Total commercial real estate		$ 2,198
Percentage of commercial real estate loan	45.00%	26.00%
Mortgage loans | Non Owner Occupied Loan Balance | Medical/dental office
Loans Held for Investment
Total commercial real estate	$ 4,645
Total commercial real estate		$ 5,524
Percentage of commercial real estate loan	100.00%	100.00%
Mortgage loans | Non Owner Occupied Loan Balance | Medical/dental office | Inland empire
Loans Held for Investment
Total commercial real estate	$ 1,797
Total commercial real estate		$ 1,910
Percentage of commercial real estate loan	39.00%	35.00%
Mortgage loans | Non Owner Occupied Loan Balance | Medical/dental office | Southern California
Loans Held for Investment
Total commercial real estate	$ 2,159
Total commercial real estate		$ 3,325
Percentage of commercial real estate loan	46.00%	60.00%
Mortgage loans | Non Owner Occupied Loan Balance | Medical/dental office | Other California
Loans Held for Investment
Total commercial real estate	$ 689
Total commercial real estate		$ 289
Percentage of commercial real estate loan	15.00%	5.00%
Mortgage loans | Non Owner Occupied Loan Balance | Mobile home park
Loans Held for Investment
Total commercial real estate	$ 6,909
Total commercial real estate		$ 7,057
Percentage of commercial real estate loan	100.00%	100.00%
Mortgage loans | Non Owner Occupied Loan Balance | Mobile home park | Inland empire
Loans Held for Investment
Total commercial real estate	$ 4,859
Total commercial real estate		$ 4,967
Percentage of commercial real estate loan	70.00%	70.00%
Mortgage loans | Non Owner Occupied Loan Balance | Mobile home park | Southern California
Loans Held for Investment
Total commercial real estate	$ 358
Total commercial real estate		$ 364
Percentage of commercial real estate loan	5.00%	5.00%
Mortgage loans | Non Owner Occupied Loan Balance | Mobile home park | Other California
Loans Held for Investment
Total commercial real estate	$ 1,692
Total commercial real estate		$ 1,726
Percentage of commercial real estate loan	25.00%	25.00%
Mortgage loans | Non Owner Occupied Loan Balance | Restaurant/Fast Food
Loans Held for Investment
Total commercial real estate	$ 500
Total commercial real estate		$ 1,014
Percentage of commercial real estate loan	100.00%	100.00%
Mortgage loans | Non Owner Occupied Loan Balance | Restaurant/Fast Food | Southern California
Loans Held for Investment
Total commercial real estate	$ 500
Total commercial real estate		$ 1,014
Percentage of commercial real estate loan	100.00%	100.00%
Mortgage loans | Non Owner Occupied Loan Balance | Automotive - non gasoline
Loans Held for Investment
Total commercial real estate	$ 578
Total commercial real estate		$ 485
Percentage of commercial real estate loan	100.00%	100.00%
Mortgage loans | Non Owner Occupied Loan Balance | Automotive - non gasoline | Southern California
Loans Held for Investment
Total commercial real estate	$ 578
Total commercial real estate		$ 485
Percentage of commercial real estate loan	100.00%	100.00%
Mortgage loans | Non Owner Occupied Loan Balance | Live/work
Loans Held for Investment
Total commercial real estate	$ 299
Total commercial real estate		$ 337
Percentage of commercial real estate loan	100.00%	100.00%
Mortgage loans | Non Owner Occupied Loan Balance | Live/work | Other California
Loans Held for Investment
Total commercial real estate	$ 299
Total commercial real estate		$ 337
Percentage of commercial real estate loan	100.00%	100.00%
Mortgage loans | Non Owner Occupied Loan Balance | Light industrial/manufacturing
Loans Held for Investment
Total commercial real estate		$ 271
Percentage of commercial real estate loan		100.00%
Mortgage loans | Non Owner Occupied Loan Balance | Light industrial/manufacturing | Southern California
Loans Held for Investment
Total commercial real estate		$ 271
Percentage of commercial real estate loan		100.00%