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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, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Segment Reporting Information |  |  |
Net interest income before provision for (reversal of) credit losses | $ 2,552,629 | $ 2,278,716 | $ 2,312,254
Noninterest income | 379,227 | 335,218 | 293,112
Total revenue before provision for (reversal of) credit losses | 2,931,856 | 2,613,934 | 2,605,366
Provision for (reversal of) credit losses | 160,000 | 174,000 | 125,000
Compensation and employee benefits | 618,753 | 550,734 | 508,538
Other noninterest expense | 427,643 | 407,339 | 512,058
Total noninterest expense | 1,046,396 | 958,073 | 1,020,596
INCOME BEFORE INCOME TAXES | 1,725,460 | 1,481,861 | 1,459,770
Segment net income (loss) | 1,325,188 | 1,165,586 | 1,161,161
Loans | 54,624,959 | 52,368,780 | 49,545,136
Deposits | 64,849,361 | 59,673,039 | 54,962,731
Segment assets | 80,434,997 | 75,976,475 | 69,612,884
Consumer and Business Banking |  |  |
Segment Reporting Information |  |  |
Net interest income before provision for (reversal of) credit losses | 1,079,288 | 1,152,033 | 1,225,954
Noninterest income | 120,779 | 108,773 | 103,210
Total revenue before provision for (reversal of) credit losses | 1,200,067 | 1,260,806 | 1,329,164
Provision for (reversal of) credit losses | 26,044 | 8,691 | 21,454
Compensation and employee benefits | 240,500 | 217,612 | 203,387
Other noninterest expense | 229,833 | 234,494 | 261,406
Total noninterest expense | 470,333 | 452,106 | 464,793
INCOME BEFORE INCOME TAXES | 703,690 | 800,009 | 842,917
Segment net income (loss) | 502,687 | 563,218 | 594,965
Loans | 20,313,671 | 18,966,662 | 17,739,984
Deposits | 33,384,458 | 30,815,912 | 28,174,781
Segment assets | 21,384,121 | 20,084,814 | 19,165,172
Commercial Banking |  |  |
Segment Reporting Information |  |  |
Net interest income before provision for (reversal of) credit losses | 1,028,314 | 1,125,931 | 1,116,013
Noninterest income | 218,177 | 197,780 | 168,502
Total revenue before provision for (reversal of) credit losses | 1,246,491 | 1,323,711 | 1,284,515
Provision for (reversal of) credit losses | 152,085 | 166,953 | 100,391
Compensation and employee benefits | 246,303 | 234,240 | 217,663
Other noninterest expense | 157,616 | 161,969 | 158,949
Total noninterest expense | 403,919 | 396,209 | 376,612
INCOME BEFORE INCOME TAXES | 690,487 | 760,549 | 807,512
Segment net income (loss) | 493,508 | 535,652 | 570,153
Loans | 34,000,936 | 32,996,221 | 31,365,547
Deposits | 27,137,950 | 25,820,956 | 23,304,066
Segment assets | 37,393,886 | 35,646,939 | 35,020,106
Treasury and Other |  |  |
Segment Reporting Information |  |  |
Net interest income before provision for (reversal of) credit losses | 445,027 | 752 | (29,713)
Noninterest income | 40,271 | 28,665 | 21,400
Total revenue before provision for (reversal of) credit losses | 485,298 | 29,417 | (8,313)
Provision for (reversal of) credit losses | (18,129) | (1,644) | 3,155
Compensation and employee benefits | 131,950 | 98,882 | 87,488
Other noninterest expense | 40,194 | 10,876 | 91,703
Total noninterest expense | 172,144 | 109,758 | 179,191
INCOME BEFORE INCOME TAXES | 331,283 | (78,697) | (190,659)
Segment net income (loss) | 328,993 | 66,716 | (3,957)
Loans | 310,352 | 405,897 | 439,605
Deposits | 4,326,953 | 3,036,171 | 3,483,884
Segment assets | $ 21,656,990 | $ 20,244,722 | $ 15,427,606

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