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Loans and Leases - Loans Held for Investment by Credit Quality Indicator (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Amortized Cost Basis by Closing Year |  |  |  |  |
Total | $ 71,116 |  | $ 71,116 |  | $ 84,619
Year to date gross charge-offs |  |  |  |  |
Total | (260) | $ (26) | (705) | $ (35) |
Loans and Leases Held for Investment: | Multi-family |  |  |  |  |
Amortized Cost Basis by Closing Year |  |  |  |  |
Originated year one | 19 |  | 19 |  | 840
Originated year two | 838 |  | 838 |  | 8,066
Originated year three | 7,989 |  | 7,989 |  | 8,182
Originated year four | 7,903 |  | 7,903 |  | 7,924
Originated year five | 7,707 |  | 7,707 |  | 4,040
Prior year | 10,666 |  | 10,666 |  | 8,167
Revolving Loans | 18 |  | 18 |  | 46
Revolving Loans Converted to Term Loans | 0 |  | 0 |  | 0
Total | 35,140 |  | 35,140 |  | 37,265
Year to date gross charge-offs |  |  |  |  |
Originated year one |  |  | 0 |  | 0
Originated year two |  |  | 0 |  | (112)
Originated year three |  |  | (18) |  | 0
Originated year four |  |  | (24) |  | 0
Originated year five |  |  | (34) |  | 0
Prior year |  |  | (112) |  | (7)
Revolving Loans |  |  | 0 |  | 0
Revolving Loans Converted to Term Loans |  |  | 0 |  | 0
Total | (101) | (2) | (188) | (2) | (119)
Loans and Leases Held for Investment: | Multi-family | Pass |  |  |  |  |
Amortized Cost Basis by Closing Year |  |  |  |  |
Originated year one | 17 |  | 17 |  | 840
Originated year two | 743 |  | 743 |  | 7,945
Originated year three | 6,631 |  | 6,631 |  | 7,967
Originated year four | 6,870 |  | 6,870 |  | 7,310
Originated year five | 5,719 |  | 5,719 |  | 3,525
Prior year | 4,381 |  | 4,381 |  | 6,537
Revolving Loans | 0 |  | 0 |  | 46
Revolving Loans Converted to Term Loans | 0 |  | 0 |  | 0
Total | 24,361 |  | 24,361 |  | 34,170
Loans and Leases Held for Investment: | Multi-family | Special Mention |  |  |  |  |
Amortized Cost Basis by Closing Year |  |  |  |  |
Originated year one | 0 |  | 0 |  | 0
Originated year two | 11 |  | 11 |  | 95
Originated year three | 817 |  | 817 |  | 33
Originated year four | 294 |  | 294 |  | 377
Originated year five | 466 |  | 466 |  | 36
Prior year | 829 |  | 829 |  | 227
Revolving Loans | 18 |  | 18 |  | 0
Revolving Loans Converted to Term Loans | 0 |  | 0 |  | 0
Total | 2,435 |  | 2,435 |  | 768
Loans and Leases Held for Investment: | Multi-family | Substandard |  |  |  |  |
Amortized Cost Basis by Closing Year |  |  |  |  |
Originated year one | 2 |  | 2 |  | 0
Originated year two | 84 |  | 84 |  | 21
Originated year three | 441 |  | 441 |  | 176
Originated year four | 643 |  | 643 |  | 237
Originated year five | 1,282 |  | 1,282 |  | 451
Prior year | 4,388 |  | 4,388 |  | 1,304
Revolving Loans | 0 |  | 0 |  | 0
Revolving Loans Converted to Term Loans | 0 |  | 0 |  | 0
Total | 6,840 |  | 6,840 |  | 2,189
Loans and Leases Held for Investment: | Multi-family | Non-accrual |  |  |  |  |
Amortized Cost Basis by Closing Year |  |  |  |  |
Originated year one | 0 |  | 0 |  | 0
Originated year two | 0 |  | 0 |  | 5
Originated year three | 100 |  | 100 |  | 6
Originated year four | 96 |  | 96 |  | 0
Originated year five | 240 |  | 240 |  | 28
Prior year | 1,068 |  | 1,068 |  | 99
Revolving Loans | 0 |  | 0 |  | 0
Revolving Loans Converted to Term Loans | 0 |  | 0 |  | 0
Total | 1,504 |  | 1,504 |  | 138
Loans and Leases Held for Investment: | Commercial real estate |  |  |  |  |
Amortized Cost Basis by Closing Year |  |  |  |  |
Originated year one | 131 |  | 131 |  | 924
Originated year two | 788 |  | 788 |  | 2,281
Originated year three | 2,009 |  | 2,009 |  | 1,242
Originated year four | 1,136 |  | 1,136 |  | 1,011
Originated year five | 885 |  | 885 |  | 1,370
Prior year | 3,752 |  | 3,752 |  | 3,458
Revolving Loans | 106 |  | 106 |  | 183
Revolving Loans Converted to Term Loans | 410 |  | 410 |  | 1
Total | 9,217 |  | 9,217 |  | 10,470
Year to date gross charge-offs |  |  |  |  |
Originated year one |  |  | 0 |  | 0
Originated year two |  |  | (8) |  | 0
Originated year three |  |  | (81) |  | 0
Originated year four |  |  | 0 |  | 0
Originated year five |  |  | (19) |  | 0
Prior year |  |  | (303) |  | (56)
Revolving Loans |  |  | 0 |  | 0
Revolving Loans Converted to Term Loans |  |  | 0 |  | 0
Total | (110) | (13) | (411) | (14) | (56)
Loans and Leases Held for Investment: | Commercial real estate | Pass |  |  |  |  |
Amortized Cost Basis by Closing Year |  |  |  |  |
Originated year one | 130 |  | 130 |  | 880
Originated year two | 705 |  | 705 |  | 2,110
Originated year three | 1,667 |  | 1,667 |  | 1,182
Originated year four | 1,061 |  | 1,061 |  | 939
Originated year five | 673 |  | 673 |  | 1,011
Prior year | 2,336 |  | 2,336 |  | 2,439
Revolving Loans | 97 |  | 97 |  | 172
Revolving Loans Converted to Term Loans | 409 |  | 409 |  | 1
Total | 7,078 |  | 7,078 |  | 8,734
Loans and Leases Held for Investment: | Commercial real estate | Special Mention |  |  |  |  |
Amortized Cost Basis by Closing Year |  |  |  |  |
Originated year one | 0 |  | 0 |  | 0
Originated year two | 35 |  | 35 |  | 122
Originated year three | 3 |  | 3 |  | 12
Originated year four | 12 |  | 12 |  | 0
Originated year five | 69 |  | 69 |  | 116
Prior year | 139 |  | 139 |  | 106
Revolving Loans | 9 |  | 9 |  | 11
Revolving Loans Converted to Term Loans | 0 |  | 0 |  | 0
Total | 267 |  | 267 |  | 367
Loans and Leases Held for Investment: | Commercial real estate | Substandard |  |  |  |  |
Amortized Cost Basis by Closing Year |  |  |  |  |
Originated year one | 1 |  | 1 |  | 44
Originated year two | 12 |  | 12 |  | 49
Originated year three | 201 |  | 201 |  | 47
Originated year four | 62 |  | 62 |  | 72
Originated year five | 110 |  | 110 |  | 239
Prior year | 793 |  | 793 |  | 790
Revolving Loans | 0 |  | 0 |  | 0
Revolving Loans Converted to Term Loans | 1 |  | 1 |  | 0
Total | 1,180 |  | 1,180 |  | 1,241
Loans and Leases Held for Investment: | Commercial real estate | Non-accrual |  |  |  |  |
Amortized Cost Basis by Closing Year |  |  |  |  |
Originated year one | 0 |  | 0 |  | 0
Originated year two | 36 |  | 36 |  | 0
Originated year three | 138 |  | 138 |  | 1
Originated year four | 1 |  | 1 |  | 0
Originated year five | 33 |  | 33 |  | 4
Prior year | 484 |  | 484 |  | 123
Revolving Loans | 0 |  | 0 |  | 0
Revolving Loans Converted to Term Loans | 0 |  | 0 |  | 0
Total | 692 |  | 692 |  | 128
Loans and Leases Held for Investment: | One-to-four family first mortgage |  |  |  |  |
Amortized Cost Basis by Closing Year |  |  |  |  |
Originated year one | 123 |  | 123 |  | 527
Originated year two | 553 |  | 553 |  | 2,643
Originated year three | 2,515 |  | 2,515 |  | 939
Originated year four | 882 |  | 882 |  | 238
Originated year five | 207 |  | 207 |  | 326
Prior year | 879 |  | 879 |  | 1,300
Revolving Loans | 87 |  | 87 |  | 78
Revolving Loans Converted to Term Loans | 1 |  | 1 |  | 10
Total | 5,247 |  | 5,247 |  | 6,061
Year to date gross charge-offs |  |  |  |  |
Originated year one |  |  | 0 |  | 0
Originated year two |  |  | 0 |  | 0
Originated year three |  |  | (1) |  | 0
Originated year four |  |  | (1) |  | 0
Originated year five |  |  | 0 |  | (1)
Prior year |  |  | (6) |  | (2)
Revolving Loans |  |  | 0 |  | 0
Revolving Loans Converted to Term Loans |  |  | 0 |  | 0
Total | (7) | (1) | (8) | (3) | (3)
Loans and Leases Held for Investment: | One-to-four family first mortgage | Pass |  |  |  |  |
Amortized Cost Basis by Closing Year |  |  |  |  |
Originated year one | 123 |  | 123 |  | 526
Originated year two | 551 |  | 551 |  | 2,627
Originated year three | 2,503 |  | 2,503 |  | 920
Originated year four | 875 |  | 875 |  | 210
Originated year five | 183 |  | 183 |  | 239
Prior year | 652 |  | 652 |  | 721
Revolving Loans | 84 |  | 84 |  | 78
Revolving Loans Converted to Term Loans | 1 |  | 1 |  | 7
Total | 4,972 |  | 4,972 |  | 5,328
Loans and Leases Held for Investment: | One-to-four family first mortgage | Special Mention |  |  |  |  |
Amortized Cost Basis by Closing Year |  |  |  |  |
Originated year one | 0 |  | 0 |  | 0
Originated year two | 0 |  | 0 |  | 0
Originated year three | 0 |  | 0 |  | 0
Originated year four | 0 |  | 0 |  | 0
Originated year five | 0 |  | 0 |  | 0
Prior year | 2 |  | 2 |  | 0
Revolving Loans | 0 |  | 0 |  | 0
Revolving Loans Converted to Term Loans | 0 |  | 0 |  | 0
Total | 2 |  | 2 |  | 0
Loans and Leases Held for Investment: | One-to-four family first mortgage | Substandard |  |  |  |  |
Amortized Cost Basis by Closing Year |  |  |  |  |
Originated year one | 0 |  | 0 |  | 0
Originated year two | 1 |  | 1 |  | 5
Originated year three | 7 |  | 7 |  | 2
Originated year four | 2 |  | 2 |  | 20
Originated year five | 20 |  | 20 |  | 69
Prior year | 204 |  | 204 |  | 542
Revolving Loans | 0 |  | 0 |  | 0
Revolving Loans Converted to Term Loans | 0 |  | 0 |  | 0
Total | 234 |  | 234 |  | 638
Loans and Leases Held for Investment: | One-to-four family first mortgage | Non-accrual |  |  |  |  |
Amortized Cost Basis by Closing Year |  |  |  |  |
Originated year one | 0 |  | 0 |  | 1
Originated year two | 1 |  | 1 |  | 11
Originated year three | 5 |  | 5 |  | 17
Originated year four | 5 |  | 5 |  | 8
Originated year five | 4 |  | 4 |  | 18
Prior year | 21 |  | 21 |  | 37
Revolving Loans | 3 |  | 3 |  | 0
Revolving Loans Converted to Term Loans | 0 |  | 0 |  | 3
Total | 39 |  | 39 |  | 95
Loans and Leases Held for Investment: | Acquisition, development, and construction |  |  |  |  |
Amortized Cost Basis by Closing Year |  |  |  |  |
Originated year one | 315 |  | 315 |  | 406
Originated year two | 573 |  | 573 |  | 329
Originated year three | 258 |  | 258 |  | 330
Originated year four | 231 |  | 231 |  | 34
Originated year five | 4 |  | 4 |  | 4
Prior year | 12 |  | 12 |  | 21
Revolving Loans | 1,870 |  | 1,870 |  | 1,688
Revolving Loans Converted to Term Loans | 2 |  | 2 |  | 100
Total | 3,265 |  | 3,265 |  | 2,912
Year to date gross charge-offs |  |  |  |  |
Originated year one |  |  | 0 |  | 0
Originated year two |  |  | 0 |  | 0
Originated year three |  |  | 0 |  | 0
Originated year four |  |  | 0 |  | 0
Originated year five |  |  | 0 |  | 0
Prior year |  |  | (4) |  | 0
Revolving Loans |  |  | 0 |  | 0
Revolving Loans Converted to Term Loans |  |  | 0 |  | 0
Total | (4) | 0 | (4) | 0 | 0
Loans and Leases Held for Investment: | Acquisition, development, and construction | Pass |  |  |  |  |
Amortized Cost Basis by Closing Year |  |  |  |  |
Originated year one | 314 |  | 314 |  | 406
Originated year two | 542 |  | 542 |  | 322
Originated year three | 169 |  | 169 |  | 298
Originated year four | 186 |  | 186 |  | 4
Originated year five | 1 |  | 1 |  | 4
Prior year | 10 |  | 10 |  | 6
Revolving Loans | 1,640 |  | 1,640 |  | 1,685
Revolving Loans Converted to Term Loans | 2 |  | 2 |  | 100
Total | 2,864 |  | 2,864 |  | 2,825
Loans and Leases Held for Investment: | Acquisition, development, and construction | Special Mention |  |  |  |  |
Amortized Cost Basis by Closing Year |  |  |  |  |
Originated year one | 0 |  | 0 |  | 0
Originated year two | 20 |  | 20 |  | 0
Originated year three | 61 |  | 61 |  | 24
Originated year four | 42 |  | 42 |  | 30
Originated year five | 3 |  | 3 |  | 0
Prior year | 0 |  | 0 |  | 0
Revolving Loans | 133 |  | 133 |  | 3
Revolving Loans Converted to Term Loans | 0 |  | 0 |  | 0
Total | 259 |  | 259 |  | 57
Loans and Leases Held for Investment: | Acquisition, development, and construction | Substandard |  |  |  |  |
Amortized Cost Basis by Closing Year |  |  |  |  |
Originated year one | 1 |  | 1 |  | 0
Originated year two | 11 |  | 11 |  | 6
Originated year three | 10 |  | 10 |  | 7
Originated year four | 2 |  | 2 |  | 0
Originated year five | 0 |  | 0 |  | 0
Prior year | 0 |  | 0 |  | 15
Revolving Loans | 97 |  | 97 |  | 0
Revolving Loans Converted to Term Loans | 0 |  | 0 |  | 0
Total | 121 |  | 121 |  | 28
Loans and Leases Held for Investment: | Acquisition, development, and construction | Non-accrual |  |  |  |  |
Amortized Cost Basis by Closing Year |  |  |  |  |
Originated year one | 0 |  | 0 |  | 0
Originated year two | 0 |  | 0 |  | 1
Originated year three | 18 |  | 18 |  | 1
Originated year four | 1 |  | 1 |  | 0
Originated year five | 0 |  | 0 |  | 0
Prior year | 2 |  | 2 |  | 0
Revolving Loans | 0 |  | 0 |  | 0
Revolving Loans Converted to Term Loans | 0 |  | 0 |  | 0
Total | 21 |  | 21 |  | 2
Loans and Leases Held for Investment: | Commercial and industrial |  |  |  |  |
Amortized Cost Basis by Closing Year |  |  |  |  |
Total | 14,045 |  | 14,045 |  | 22,065
Other loans held for investment |  |  |  |  |
Year to date gross charge-offs |  |  |  |  |
Total | (38) | $ (10) | (94) | $ (16) |
Other loans held for investment | Commercial and industrial |  |  |  |  |
Amortized Cost Basis by Closing Year |  |  |  |  |
Originated year one | 939 |  | 939 |  | 9,428
Originated year two | 3,170 |  | 3,170 |  | 3,767
Originated year three | 2,590 |  | 2,590 |  | 1,695
Originated year four | 886 |  | 886 |  | 1,019
Originated year five | 565 |  | 565 |  | 764
Prior year | 1,025 |  | 1,025 |  | 846
Revolving Loans | 5,974 |  | 5,974 |  | 7,679
Revolving Loans Converted to Term Loans | 1,325 |  | 1,325 |  | 56
Total | 16,474 |  | 16,474 |  | 25,254
Year to date gross charge-offs |  |  |  |  |
Originated year one |  |  | (3) |  | (2)
Originated year two |  |  | (12) |  | (7)
Originated year three |  |  | (17) |  | (1)
Originated year four |  |  | (5) |  | (7)
Originated year five |  |  | (11) |  | 0
Prior year |  |  | (31) |  | (14)
Revolving Loans |  |  | 0 |  | 0
Revolving Loans Converted to Term Loans |  |  | 0 |  | 0
Total |  |  | (79) |  | (31)
Other loans held for investment | Commercial and industrial | Pass |  |  |  |  |
Amortized Cost Basis by Closing Year |  |  |  |  |
Originated year one | 892 |  | 892 |  | 9,418
Originated year two | 3,099 |  | 3,099 |  | 3,547
Originated year three | 2,269 |  | 2,269 |  | 1,633
Originated year four | 786 |  | 786 |  | 984
Originated year five | 537 |  | 537 |  | 719
Prior year | 966 |  | 966 |  | 791
Revolving Loans | 5,696 |  | 5,696 |  | 7,535
Revolving Loans Converted to Term Loans | 1,319 |  | 1,319 |  | 56
Total | 15,564 |  | 15,564 |  | 24,683
Other loans held for investment | Commercial and industrial | Special Mention |  |  |  |  |
Amortized Cost Basis by Closing Year |  |  |  |  |
Originated year one | 15 |  | 15 |  | 1
Originated year two | 19 |  | 19 |  | 182
Originated year three | 24 |  | 24 |  | 17
Originated year four | 9 |  | 9 |  | 8
Originated year five | 8 |  | 8 |  | 6
Prior year | 4 |  | 4 |  | 20
Revolving Loans | 69 |  | 69 |  | 101
Revolving Loans Converted to Term Loans | 6 |  | 6 |  | 0
Total | 154 |  | 154 |  | 335
Other loans held for investment | Commercial and industrial | Substandard |  |  |  |  |
Amortized Cost Basis by Closing Year |  |  |  |  |
Originated year one | 32 |  | 32 |  | 7
Originated year two | 38 |  | 38 |  | 24
Originated year three | 110 |  | 110 |  | 43
Originated year four | 83 |  | 83 |  | 16
Originated year five | 6 |  | 6 |  | 38
Prior year | 43 |  | 43 |  | 33
Revolving Loans | 209 |  | 209 |  | 32
Revolving Loans Converted to Term Loans | 0 |  | 0 |  | 0
Total | 521 |  | 521 |  | 193
Other loans held for investment | Commercial and industrial | Non-accrual |  |  |  |  |
Amortized Cost Basis by Closing Year |  |  |  |  |
Originated year one | 0 |  | 0 |  | 2
Originated year two | 14 |  | 14 |  | 14
Originated year three | 187 |  | 187 |  | 2
Originated year four | 8 |  | 8 |  | 11
Originated year five | 14 |  | 14 |  | 1
Prior year | 12 |  | 12 |  | 2
Revolving Loans | 0 |  | 0 |  | 11
Revolving Loans Converted to Term Loans | 0 |  | 0 |  | 0
Total | 235 |  | 235 |  | 43
Other loans held for investment | Other |  |  |  |  |
Amortized Cost Basis by Closing Year |  |  |  |  |
Originated year one | 97 |  | 97 |  | 171
Originated year two | 31 |  | 31 |  | 348
Originated year three | 13 |  | 13 |  | 245
Originated year four | 6 |  | 6 |  | 134
Originated year five | 2 |  | 2 |  | 134
Prior year | 42 |  | 42 |  | 119
Revolving Loans | 1,452 |  | 1,452 |  | 1,227
Revolving Loans Converted to Term Loans | 130 |  | 130 |  | 279
Total | 1,773 |  | 1,773 |  | 2,657
Year to date gross charge-offs |  |  |  |  |
Originated year one |  |  | (2) |  | 0
Originated year two |  |  | (3) |  | (3)
Originated year three |  |  | (3) |  | (4)
Originated year four |  |  | (1) |  | (1)
Originated year five |  |  | (1) |  | (2)
Prior year |  |  | (5) |  | (4)
Revolving Loans |  |  | 0 |  | 0
Revolving Loans Converted to Term Loans |  |  | 0 |  | 0
Total |  |  | (15) |  | (14)
Other loans held for investment | Other | Pass |  |  |  |  |
Amortized Cost Basis by Closing Year |  |  |  |  |
Originated year one | 97 |  | 97 |  | 171
Originated year two | 31 |  | 31 |  | 346
Originated year three | 13 |  | 13 |  | 244
Originated year four | 5 |  | 5 |  | 133
Originated year five | 2 |  | 2 |  | 133
Prior year | 37 |  | 37 |  | 117
Revolving Loans | 1,434 |  | 1,434 |  | 1,223
Revolving Loans Converted to Term Loans | 130 |  | 130 |  | 268
Total | 1,749 |  | 1,749 |  | 2,635
Other loans held for investment | Other | Special Mention |  |  |  |  |
Amortized Cost Basis by Closing Year |  |  |  |  |
Originated year one | 0 |  | 0 |  |
Originated year two | 0 |  | 0 |  |
Originated year three | 0 |  | 0 |  |
Originated year four | 1 |  | 1 |  |
Originated year five | 0 |  | 0 |  |
Prior year | 0 |  | 0 |  |
Revolving Loans | 0 |  | 0 |  |
Revolving Loans Converted to Term Loans | 0 |  | 0 |  |
Total | 1 |  | 1 |  |
Other loans held for investment | Other | Substandard |  |  |  |  |
Amortized Cost Basis by Closing Year |  |  |  |  |
Originated year one | 0 |  | 0 |  |
Originated year two | 0 |  | 0 |  |
Originated year three | 0 |  | 0 |  |
Originated year four | 0 |  | 0 |  |
Originated year five | 0 |  | 0 |  |
Prior year | 0 |  | 0 |  |
Revolving Loans | 0 |  | 0 |  |
Revolving Loans Converted to Term Loans | 0 |  | 0 |  |
Total | 0 |  | 0 |  |
Other loans held for investment | Other | Non-accrual |  |  |  |  |
Amortized Cost Basis by Closing Year |  |  |  |  |
Originated year one | 0 |  | 0 |  | 0
Originated year two | 0 |  | 0 |  | 2
Originated year three | 0 |  | 0 |  | 1
Originated year four | 0 |  | 0 |  | 1
Originated year five | 0 |  | 0 |  | 1
Prior year | 5 |  | 5 |  | 2
Revolving Loans | 18 |  | 18 |  | 4
Revolving Loans Converted to Term Loans | 0 |  | 0 |  | 11
Total | $ 23 |  | $ 23 |  | $ 22

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