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Loans and Leases - Credit Quality Indicators (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Financing Receivable |  |  |
Total | $ 56,597,110 | $ 52,505,168 |
Current period gross write-offs |  |  |
Total | 189,290 | 176,470 | $ 117,212
Consumer portfolio |  |  |
Financing Receivable |  |  |
Total financing receivable, Current fiscal year | 1,683,622 | 1,298,754 |
Total financing receivable, Fiscal year before current fiscal year | 1,264,220 | 763,519 |
Total financing receivable, Two years before current fiscal year | 651,351 | 1,924,258 |
Total financing receivable, Three years before current fiscal year | 1,822,158 | 2,156,856 |
Total financing receivable, Four years before current fiscal year | 2,018,069 | 811,965 |
Total financing receivable, More than five years before current fiscal year | 2,908,007 | 2,420,593 |
Revolving Loans Amortized Cost Basis | 1,019,487 | 1,061,222 |
Total | 11,366,914 | 10,437,167 |
Current period gross write-offs |  |  |
Current fiscal year | 3,325 | 3,467 |
Fiscal year before current fiscal year | 3,641 | 17 |
Two years before current fiscal year | 19 | 34 |
Three years before current fiscal year | 11 | 20 |
Four years before current fiscal year | 7 | 115 |
More than five years before current fiscal year | 180 | 784 |
Revolving Loans Amortized Cost Basis | 343 | 573 |
Total | 7,526 | 5,010 | $ 12,703
Consumer portfolio | Residential |  |  |
Financing Receivable |  |  |
Total financing receivable, Current fiscal year | 1,407,722 | 1,151,655 |
Total financing receivable, Fiscal year before current fiscal year | 1,110,459 | 697,121 |
Total financing receivable, Two years before current fiscal year | 596,381 | 1,862,151 |
Total financing receivable, Three years before current fiscal year | 1,767,892 | 2,082,332 |
Total financing receivable, Four years before current fiscal year | 1,952,691 | 770,546 |
Total financing receivable, More than five years before current fiscal year | 2,764,432 | 2,289,864 |
Revolving Loans Amortized Cost Basis | 0 | 0 |
Total | 9,599,577 | 8,853,669 |
Current period gross write-offs |  |  |
Current fiscal year | 0 | 0 |
Fiscal year before current fiscal year | 0 | 0 |
Two years before current fiscal year | 0 | 0 |
Three years before current fiscal year | 0 | 0 |
Four years before current fiscal year | 0 | 0 |
More than five years before current fiscal year | 135 | 147 |
Revolving Loans Amortized Cost Basis | 0 | 0 |
Total | 135 | 147 |
Consumer portfolio | Home equity |  |  |
Financing Receivable |  |  |
Total financing receivable, Current fiscal year | 40,349 | 37,780 |
Total financing receivable, Fiscal year before current fiscal year | 32,361 | 64,724 |
Total financing receivable, Two years before current fiscal year | 53,927 | 61,048 |
Total financing receivable, Three years before current fiscal year | 53,703 | 72,184 |
Total financing receivable, Four years before current fiscal year | 63,495 | 40,991 |
Total financing receivable, More than five years before current fiscal year | 143,074 | 129,910 |
Revolving Loans Amortized Cost Basis | 983,604 | 1,021,055 |
Total | 1,370,513 | 1,427,692 |
Current period gross write-offs |  |  |
Current fiscal year | 0 | 0 |
Fiscal year before current fiscal year | 50 | 0 |
Two years before current fiscal year | 0 | 0 |
Three years before current fiscal year | 1 | 0 |
Four years before current fiscal year | 0 | 2 |
More than five years before current fiscal year | 38 | 444 |
Revolving Loans Amortized Cost Basis | 175 | 351 |
Total | 264 | 797 |
Consumer portfolio | Other consumer |  |  |
Financing Receivable |  |  |
Total financing receivable, Current fiscal year | 235,551 | 109,319 |
Total financing receivable, Fiscal year before current fiscal year | 121,400 | 1,674 |
Total financing receivable, Two years before current fiscal year | 1,043 | 1,059 |
Total financing receivable, Three years before current fiscal year | 563 | 2,340 |
Total financing receivable, Four years before current fiscal year | 1,883 | 428 |
Total financing receivable, More than five years before current fiscal year | 501 | 819 |
Revolving Loans Amortized Cost Basis | 35,883 | 40,167 |
Total | 396,824 | 155,806 |
Current period gross write-offs |  |  |
Current fiscal year | 3,325 | 3,467 |
Fiscal year before current fiscal year | 3,591 | 17 |
Two years before current fiscal year | 19 | 34 |
Three years before current fiscal year | 10 | 20 |
Four years before current fiscal year | 7 | 113 |
More than five years before current fiscal year | 7 | 193 |
Revolving Loans Amortized Cost Basis | 168 | 222 |
Total | 7,127 | 4,066 |
800+ | Consumer portfolio | Residential |  |  |
Financing Receivable |  |  |
Total financing receivable, Current fiscal year | 517,482 | 312,771 |
Total financing receivable, Fiscal year before current fiscal year | 551,613 | 299,006 |
Total financing receivable, Two years before current fiscal year | 272,249 | 909,109 |
Total financing receivable, Three years before current fiscal year | 918,256 | 1,097,807 |
Total financing receivable, Four years before current fiscal year | 1,045,573 | 433,950 |
Total financing receivable, More than five years before current fiscal year | 1,258,654 | 956,478 |
Revolving Loans Amortized Cost Basis | 0 | 0 |
Total | 4,563,827 | 4,009,121 |
800+ | Consumer portfolio | Home equity |  |  |
Financing Receivable |  |  |
Total financing receivable, Current fiscal year | 11,847 | 12,313 |
Total financing receivable, Fiscal year before current fiscal year | 8,896 | 25,226 |
Total financing receivable, Two years before current fiscal year | 23,146 | 23,512 |
Total financing receivable, Three years before current fiscal year | 22,811 | 32,695 |
Total financing receivable, Four years before current fiscal year | 29,498 | 22,705 |
Total financing receivable, More than five years before current fiscal year | 65,401 | 53,844 |
Revolving Loans Amortized Cost Basis | 348,961 | 365,741 |
Total | 510,560 | 536,036 |
800+ | Consumer portfolio | Other consumer |  |  |
Financing Receivable |  |  |
Total financing receivable, Current fiscal year | 11,131 | 4,920 |
Total financing receivable, Fiscal year before current fiscal year | 4,799 | 312 |
Total financing receivable, Two years before current fiscal year | 254 | 218 |
Total financing receivable, Three years before current fiscal year | 74 | 1,765 |
Total financing receivable, Four years before current fiscal year | 1,677 | 50 |
Total financing receivable, More than five years before current fiscal year | 171 | 284 |
Revolving Loans Amortized Cost Basis | 16,597 | 31,549 |
Total | 34,703 | 39,098 |
740-799 | Consumer portfolio | Residential |  |  |
Financing Receivable |  |  |
Total financing receivable, Current fiscal year | 687,120 | 649,118 |
Total financing receivable, Fiscal year before current fiscal year | 419,019 | 258,699 |
Total financing receivable, Two years before current fiscal year | 212,246 | 567,545 |
Total financing receivable, Three years before current fiscal year | 480,885 | 656,599 |
Total financing receivable, Four years before current fiscal year | 598,172 | 235,749 |
Total financing receivable, More than five years before current fiscal year | 748,825 | 623,989 |
Revolving Loans Amortized Cost Basis | 0 | 0 |
Total | 3,146,267 | 2,991,699 |
740-799 | Consumer portfolio | Home equity |  |  |
Financing Receivable |  |  |
Total financing receivable, Current fiscal year | 15,932 | 12,238 |
Total financing receivable, Fiscal year before current fiscal year | 11,658 | 21,831 |
Total financing receivable, Two years before current fiscal year | 16,149 | 20,718 |
Total financing receivable, Three years before current fiscal year | 16,523 | 23,517 |
Total financing receivable, Four years before current fiscal year | 19,123 | 10,861 |
Total financing receivable, More than five years before current fiscal year | 35,861 | 33,703 |
Revolving Loans Amortized Cost Basis | 317,846 | 330,691 |
Total | 433,092 | 453,559 |
740-799 | Consumer portfolio | Other consumer |  |  |
Financing Receivable |  |  |
Total financing receivable, Current fiscal year | 88,171 | 45,001 |
Total financing receivable, Fiscal year before current fiscal year | 46,222 | 721 |
Total financing receivable, Two years before current fiscal year | 368 | 301 |
Total financing receivable, Three years before current fiscal year | 145 | 165 |
Total financing receivable, Four years before current fiscal year | 30 | 124 |
Total financing receivable, More than five years before current fiscal year | 136 | 266 |
Revolving Loans Amortized Cost Basis | 3,273 | 3,550 |
Total | 138,345 | 50,128 |
670-739 | Consumer portfolio | Residential |  |  |
Financing Receivable |  |  |
Total financing receivable, Current fiscal year | 185,620 | 172,886 |
Total financing receivable, Fiscal year before current fiscal year | 118,104 | 123,354 |
Total financing receivable, Two years before current fiscal year | 84,332 | 317,373 |
Total financing receivable, Three years before current fiscal year | 294,954 | 271,247 |
Total financing receivable, Four years before current fiscal year | 241,266 | 80,318 |
Total financing receivable, More than five years before current fiscal year | 604,881 | 550,252 |
Revolving Loans Amortized Cost Basis | 0 | 0 |
Total | 1,529,157 | 1,515,430 |
670-739 | Consumer portfolio | Home equity |  |  |
Financing Receivable |  |  |
Total financing receivable, Current fiscal year | 10,811 | 11,416 |
Total financing receivable, Fiscal year before current fiscal year | 9,786 | 14,298 |
Total financing receivable, Two years before current fiscal year | 10,120 | 12,732 |
Total financing receivable, Three years before current fiscal year | 9,351 | 13,074 |
Total financing receivable, Four years before current fiscal year | 11,025 | 6,242 |
Total financing receivable, More than five years before current fiscal year | 27,662 | 28,638 |
Revolving Loans Amortized Cost Basis | 217,924 | 224,449 |
Total | 296,679 | 310,849 |
670-739 | Consumer portfolio | Other consumer |  |  |
Financing Receivable |  |  |
Total financing receivable, Current fiscal year | 133,564 | 57,952 |
Total financing receivable, Fiscal year before current fiscal year | 68,381 | 432 |
Total financing receivable, Two years before current fiscal year | 282 | 372 |
Total financing receivable, Three years before current fiscal year | 231 | 313 |
Total financing receivable, Four years before current fiscal year | 130 | 220 |
Total financing receivable, More than five years before current fiscal year | 133 | 188 |
Revolving Loans Amortized Cost Basis | 14,439 | 3,349 |
Total | 217,160 | 62,826 |
580-669 | Consumer portfolio | Residential |  |  |
Financing Receivable |  |  |
Total financing receivable, Current fiscal year | 16,852 | 16,643 |
Total financing receivable, Fiscal year before current fiscal year | 19,346 | 13,382 |
Total financing receivable, Two years before current fiscal year | 23,602 | 55,507 |
Total financing receivable, Three years before current fiscal year | 51,886 | 35,292 |
Total financing receivable, Four years before current fiscal year | 45,714 | 16,738 |
Total financing receivable, More than five years before current fiscal year | 100,593 | 109,240 |
Revolving Loans Amortized Cost Basis | 0 | 0 |
Total | 257,993 | 246,802 |
580-669 | Consumer portfolio | Home equity |  |  |
Financing Receivable |  |  |
Total financing receivable, Current fiscal year | 1,682 | 1,755 |
Total financing receivable, Fiscal year before current fiscal year | 1,522 | 2,570 |
Total financing receivable, Two years before current fiscal year | 2,850 | 1,685 |
Total financing receivable, Three years before current fiscal year | 2,731 | 2,172 |
Total financing receivable, Four years before current fiscal year | 2,941 | 754 |
Total financing receivable, More than five years before current fiscal year | 9,607 | 9,471 |
Revolving Loans Amortized Cost Basis | 68,953 | 67,745 |
Total | 90,286 | 86,152 |
580-669 | Consumer portfolio | Other consumer |  |  |
Financing Receivable |  |  |
Total financing receivable, Current fiscal year | 2,651 | 1,417 |
Total financing receivable, Fiscal year before current fiscal year | 1,962 | 116 |
Total financing receivable, Two years before current fiscal year | 74 | 105 |
Total financing receivable, Three years before current fiscal year | 60 | 69 |
Total financing receivable, Four years before current fiscal year | 27 | 25 |
Total financing receivable, More than five years before current fiscal year | 59 | 81 |
Revolving Loans Amortized Cost Basis | 1,136 | 1,150 |
Total | 5,969 | 2,963 |
579 and below | Consumer portfolio | Residential |  |  |
Financing Receivable |  |  |
Total financing receivable, Current fiscal year | 648 | 237 |
Total financing receivable, Fiscal year before current fiscal year | 2,377 | 2,680 |
Total financing receivable, Two years before current fiscal year | 3,952 | 12,617 |
Total financing receivable, Three years before current fiscal year | 21,911 | 21,387 |
Total financing receivable, Four years before current fiscal year | 21,966 | 3,791 |
Total financing receivable, More than five years before current fiscal year | 51,479 | 49,905 |
Revolving Loans Amortized Cost Basis | 0 | 0 |
Total | 102,333 | 90,617 |
579 and below | Consumer portfolio | Home equity |  |  |
Financing Receivable |  |  |
Total financing receivable, Current fiscal year | 77 | 58 |
Total financing receivable, Fiscal year before current fiscal year | 499 | 799 |
Total financing receivable, Two years before current fiscal year | 1,662 | 2,401 |
Total financing receivable, Three years before current fiscal year | 2,287 | 726 |
Total financing receivable, Four years before current fiscal year | 908 | 429 |
Total financing receivable, More than five years before current fiscal year | 4,543 | 4,254 |
Revolving Loans Amortized Cost Basis | 29,920 | 32,429 |
Total | 39,896 | 41,096 |
579 and below | Consumer portfolio | Other consumer |  |  |
Financing Receivable |  |  |
Total financing receivable, Current fiscal year | 34 | 29 |
Total financing receivable, Fiscal year before current fiscal year | 36 | 93 |
Total financing receivable, Two years before current fiscal year | 65 | 63 |
Total financing receivable, Three years before current fiscal year | 53 | 28 |
Total financing receivable, Four years before current fiscal year | 19 | 9 |
Total financing receivable, More than five years before current fiscal year | 2 | 0 |
Revolving Loans Amortized Cost Basis | 438 | 569 |
Total | $ 647 | $ 791 |

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