Loans Receivable - Schedule of Loan Delinquencies by Loan Portfolio and Class (Details) - USD ($)
$ in Thousands |
Jun. 30, 2026 |
Sep. 30, 2025 |
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
$ 20,232,707
|
$ 20,288,338
|
| Delinquency percent, past due |
0.75%
|
0.60%
|
| Current |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
$ 20,080,756
|
$ 20,165,753
|
| Delinquency percent, current |
99.25%
|
99.40%
|
| Total Delinquent |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
$ 151,951
|
$ 122,585
|
| Delinquency percent, past due |
0.75%
|
0.60%
|
| 30 days past due |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
$ 12,639
|
$ 18,558
|
| Delinquency percent, past due |
0.06%
|
0.09%
|
| 60 days past due |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
$ 18,940
|
$ 21,204
|
| Delinquency percent, past due |
0.08%
|
0.10%
|
| 90 Days Delinquent |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
$ 120,372
|
$ 82,823
|
| Delinquency percent, past due |
0.60%
|
0.41%
|
| Commercial loans |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
$ 12,574,277
|
$ 11,851,657
|
| Delinquency percent, past due |
0.87%
|
0.61%
|
| Commercial loans | Current |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
$ 12,464,379
|
$ 11,778,787
|
| Commercial loans | Total Delinquent |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
109,898
|
72,870
|
| Commercial loans | 30 days past due |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
811
|
139
|
| Commercial loans | 60 days past due |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
11,922
|
14,482
|
| Commercial loans | 90 Days Delinquent |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
97,165
|
58,249
|
| Commercial loans | Multi-family |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
$ 4,645,902
|
$ 4,631,321
|
| Delinquency percent, past due |
0.77%
|
0.45%
|
| Commercial loans | Multi-family | Current |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
$ 4,609,974
|
$ 4,610,677
|
| Commercial loans | Multi-family | Total Delinquent |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
35,928
|
20,644
|
| Commercial loans | Multi-family | 30 days past due |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
0
|
0
|
| Commercial loans | Multi-family | 60 days past due |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
2,103
|
12,482
|
| Commercial loans | Multi-family | 90 Days Delinquent |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
33,825
|
8,162
|
| Commercial loans | Commercial real estate |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
$ 3,626,043
|
$ 3,588,950
|
| Delinquency percent, past due |
0.28%
|
1.42%
|
| Commercial loans | Commercial real estate | Current |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
$ 3,616,011
|
$ 3,537,909
|
| Commercial loans | Commercial real estate | Total Delinquent |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
10,032
|
51,041
|
| Commercial loans | Commercial real estate | 30 days past due |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
700
|
87
|
| Commercial loans | Commercial real estate | 60 days past due |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
9,332
|
912
|
| Commercial loans | Commercial real estate | 90 Days Delinquent |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
0
|
50,042
|
| Commercial loans | Commercial & industrial |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
$ 3,101,192
|
$ 2,386,363
|
| Delinquency percent, past due |
2.06%
|
0.05%
|
| Commercial loans | Commercial & industrial | Current |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
$ 3,037,254
|
$ 2,385,178
|
| Commercial loans | Commercial & industrial | Total Delinquent |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
63,938
|
1,185
|
| Commercial loans | Commercial & industrial | 30 days past due |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
111
|
52
|
| Commercial loans | Commercial & industrial | 60 days past due |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
487
|
1,088
|
| Commercial loans | Commercial & industrial | 90 Days Delinquent |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
63,340
|
45
|
| Commercial loans | Construction |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
$ 1,015,908
|
$ 1,105,101
|
| Delinquency percent, past due |
0.00%
|
0.00%
|
| Commercial loans | Construction | Current |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
$ 1,015,908
|
$ 1,105,101
|
| Commercial loans | Construction | Total Delinquent |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
0
|
0
|
| Commercial loans | Construction | 30 days past due |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
0
|
0
|
| Commercial loans | Construction | 60 days past due |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
0
|
0
|
| Commercial loans | Construction | 90 Days Delinquent |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
0
|
0
|
| Commercial loans | Land - acquisition & development |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
$ 185,232
|
$ 139,922
|
| Delinquency percent, past due |
0.00%
|
0.00%
|
| Commercial loans | Land - acquisition & development | Current |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
$ 185,232
|
$ 139,922
|
| Commercial loans | Land - acquisition & development | Total Delinquent |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
0
|
0
|
| Commercial loans | Land - acquisition & development | 30 days past due |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
0
|
0
|
| Commercial loans | Land - acquisition & development | 60 days past due |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
0
|
0
|
| Commercial loans | Land - acquisition & development | 90 Days Delinquent |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
0
|
0
|
| Consumer loans |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
$ 7,658,430
|
$ 8,436,681
|
| Delinquency percent, past due |
0.55%
|
0.59%
|
| Consumer loans | Current |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
$ 7,616,377
|
$ 8,386,966
|
| Consumer loans | Total Delinquent |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
42,053
|
49,715
|
| Consumer loans | 30 days past due |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
11,828
|
18,419
|
| Consumer loans | 60 days past due |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
7,018
|
6,722
|
| Consumer loans | 90 Days Delinquent |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
23,207
|
24,574
|
| Consumer loans | Construction |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
$ 16,417
|
$ 78,243
|
| Delinquency percent, past due |
5.43%
|
0.97%
|
| Consumer loans | Construction | Current |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
$ 15,525
|
$ 77,483
|
| Consumer loans | Construction | Total Delinquent |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
892
|
760
|
| Consumer loans | Construction | 30 days past due |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
0
|
0
|
| Consumer loans | Construction | 60 days past due |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
0
|
0
|
| Consumer loans | Construction | 90 Days Delinquent |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
892
|
760
|
| Consumer loans | Single-family residential |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
$ 7,268,163
|
$ 7,936,931
|
| Delinquency percent, past due |
0.51%
|
0.58%
|
| Consumer loans | Single-family residential | Current |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
$ 7,230,764
|
$ 7,890,843
|
| Consumer loans | Single-family residential | Total Delinquent |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
37,399
|
46,088
|
| Consumer loans | Single-family residential | 30 days past due |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
9,865
|
16,639
|
| Consumer loans | Single-family residential | 60 days past due |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
6,307
|
6,176
|
| Consumer loans | Single-family residential | 90 Days Delinquent |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
21,227
|
23,273
|
| Consumer loans | Land - consumer lot loans |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
$ 71,982
|
$ 88,696
|
| Delinquency percent, past due |
0.83%
|
0.37%
|
| Consumer loans | Land - consumer lot loans | Current |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
$ 71,386
|
$ 88,364
|
| Consumer loans | Land - consumer lot loans | Total Delinquent |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
596
|
332
|
| Consumer loans | Land - consumer lot loans | 30 days past due |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
336
|
249
|
| Consumer loans | Land - consumer lot loans | 60 days past due |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
21
|
60
|
| Consumer loans | Land - consumer lot loans | 90 Days Delinquent |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
239
|
23
|
| Consumer loans | HELOC |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
$ 247,584
|
$ 271,286
|
| Delinquency percent, past due |
1.05%
|
0.80%
|
| Consumer loans | HELOC | Current |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
$ 244,991
|
$ 269,104
|
| Consumer loans | HELOC | Total Delinquent |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
2,593
|
2,182
|
| Consumer loans | HELOC | 30 days past due |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
1,406
|
1,432
|
| Consumer loans | HELOC | 60 days past due |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
602
|
384
|
| Consumer loans | HELOC | 90 Days Delinquent |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
585
|
366
|
| Consumer loans | Consumer |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
$ 54,284
|
$ 61,525
|
| Delinquency percent, past due |
1.06%
|
0.57%
|
| Consumer loans | Consumer | Current |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
$ 53,711
|
$ 61,172
|
| Consumer loans | Consumer | Total Delinquent |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
573
|
353
|
| Consumer loans | Consumer | 30 days past due |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
221
|
99
|
| Consumer loans | Consumer | 60 days past due |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
88
|
102
|
| Consumer loans | Consumer | 90 Days Delinquent |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans receivable |
$ 264
|
$ 152
|