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Business Segments - Schedule Of Operating Results And Other Key Financial Measures For The Individual Operating Segments (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Segment Reporting Information |  |  |
Net interest income before provision for credit losses | $ 2,278,716 | $ 2,312,254 | $ 2,045,881
Noninterest income | 335,218 | 295,264 | 298,666
Total revenue (loss) before provision for credit losses | 2,613,934 | 2,607,518 | 2,344,547
Provision for (reversal of) credit losses | 174,000 | 125,000 | 73,500
Compensation and employee benefits | 550,734 | 508,538 | 477,635
Other noninterest expense | 407,339 | 514,210 | 381,758
Total noninterest expense | 958,073 | 1,022,748 | 859,393
INCOME BEFORE INCOME TAXES | 1,481,861 | 1,459,770 | 1,411,654
Segment net income | 1,165,586 | 1,161,161 | 1,128,083
Loans | 52,368,780 | 49,545,136 | 45,319,458
Deposits | 59,673,039 | 54,962,731 | 54,299,579
Segment assets | 75,976,475 | 69,612,884 | 64,112,150
Consumer and Business Banking |  |  |
Segment Reporting Information |  |  |
Net interest income before provision for credit losses | 1,152,033 | 1,225,954 | 1,061,238
Noninterest income | 108,773 | 103,890 | 113,722
Total revenue (loss) before provision for credit losses | 1,260,806 | 1,329,844 | 1,174,960
Provision for (reversal of) credit losses | 8,691 | 21,454 | 25,983
Compensation and employee benefits | 217,612 | 203,387 | 195,394
Other noninterest expense | 234,494 | 262,086 | 196,581
Total noninterest expense | 452,106 | 465,473 | 391,975
INCOME BEFORE INCOME TAXES | 800,009 | 842,917 | 757,002
Segment net income | 563,218 | 594,965 | 537,754
Loans | 18,966,662 | 17,739,984 | 15,534,259
Deposits | 30,815,912 | 28,174,781 | 27,276,151
Segment assets | 20,084,814 | 19,165,172 | 17,183,425
Commercial Banking |  |  |
Segment Reporting Information |  |  |
Net interest income before provision for credit losses | 1,125,931 | 1,116,013 | 988,158
Noninterest income | 197,780 | 168,502 | 174,365
Total revenue (loss) before provision for credit losses | 1,323,711 | 1,284,515 | 1,162,523
Provision for (reversal of) credit losses | 166,953 | 100,391 | 48,248
Compensation and employee benefits | 234,240 | 217,663 | 211,355
Other noninterest expense | 161,969 | 158,949 | 102,018
Total noninterest expense | 396,209 | 376,612 | 313,373
INCOME BEFORE INCOME TAXES | 760,549 | 807,512 | 800,902
Segment net income | 535,652 | 570,153 | 569,982
Loans | 32,996,221 | 31,365,547 | 29,321,701
Deposits | 25,820,956 | 23,304,066 | 23,252,073
Segment assets | 35,646,939 | 35,020,106 | 32,770,772
Treasury and Other |  |  |
Segment Reporting Information |  |  |
Net interest income before provision for credit losses | 752 | (29,713) | (3,515)
Noninterest income | 28,665 | 22,872 | 10,579
Total revenue (loss) before provision for credit losses | 29,417 | (6,841) | 7,064
Provision for (reversal of) credit losses | (1,644) | 3,155 | (731)
Compensation and employee benefits | 98,882 | 87,488 | 70,886
Other noninterest expense | 10,876 | 93,175 | 83,159
Total noninterest expense | 109,758 | 180,663 | 154,045
INCOME BEFORE INCOME TAXES | (78,697) | (190,659) | (146,250)
Segment net income | 66,716 | (3,957) | 20,347
Loans | 405,897 | 439,605 | 463,498
Deposits | 3,036,171 | 3,483,884 | 3,771,355
Segment assets | $ 20,244,722 | $ 15,427,606 | $ 14,157,953

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