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Loans and Allowance for Credit Losses - Summary of Amortized Cost Balance of Each of Loan Classes Disaggregated by Collateral Type and Origination Year (Detail) - USD ($) $ in Thousands | Mar. 31, 2026 | Dec. 31, 2025
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2026 | $ 2,519,181 | $ 8,655,716
Amortized Cost Basis by Origination Year 2025 | 8,066,709 | 4,969,894
Amortized Cost Basis by Origination Year 2024 | 4,858,893 | 4,262,716
Amortized Cost Basis by Origination Year 2023 | 3,789,730 | 4,744,514
Amortized Cost Basis by Origination Year 2022 | 4,549,517 | 3,367,603
Amortized Cost Basis by Origination Year Prior to 2022 | 5,904,456 | 2,963,655
Amortized Cost - Revolving Loans | 10,393,194 | 9,794,020
Amortized Cost - Revolving Loans Converted to Term Loans | 52,645 | 21,290
Total Loans | 40,134,325 | 38,779,408
Commercial and Industrial Portfolio [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2026 | 990,186 | 3,149,806
Amortized Cost Basis by Origination Year 2025 | 3,011,240 | 2,210,428
Amortized Cost Basis by Origination Year 2024 | 2,114,774 | 1,432,712
Amortized Cost Basis by Origination Year 2023 | 1,291,921 | 1,023,493
Amortized Cost Basis by Origination Year 2023, Current period charge-offs | 82 |
Amortized Cost Basis by Origination Year 2022 | 941,565 | 487,188
Amortized Cost Basis by Origination Year 2022, Current period charge-offs | 117 |
Amortized Cost Basis by Origination Year Prior to 2022 | 795,352 | 354,347
Amortized Cost Basis by Origination Year Prior to 2022, Current period charge-offs | 73 |
Amortized Cost - Revolving Loans | 7,878,286 | 7,597,831
Amortized Cost - Revolving Loans, Current period charge-offs | 3,077 |
Amortized Cost - Revolving Loans Converted to Term Loans | 45,440 | 14,715
Total Loans | 17,068,764 | 16,270,520
Total Loans, Current period charge-offs | 3,349 |
Commercial and Industrial Portfolio [Member] | Equipment/Accounts Receivable/Inventory [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2026 | 944,324 | 2,989,029
Amortized Cost Basis by Origination Year 2025 | 2,793,596 | 1,901,767
Amortized Cost Basis by Origination Year 2024 | 1,811,310 | 1,039,595
Amortized Cost Basis by Origination Year 2023 | 907,969 | 929,230
Amortized Cost Basis by Origination Year 2022 | 874,584 | 471,193
Amortized Cost Basis by Origination Year Prior to 2022 | 762,205 | 321,761
Amortized Cost - Revolving Loans | 5,791,960 | 5,636,442
Amortized Cost - Revolving Loans Converted to Term Loans | 44,961 | 12,186
Total Loans | 13,930,909 | 13,301,203
Commercial and Industrial Portfolio [Member] | Agriculture [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2026 | 6,744 | 30,385
Amortized Cost Basis by Origination Year 2025 | 26,657 | 22,585
Amortized Cost Basis by Origination Year 2024 | 20,970 | 24,980
Amortized Cost Basis by Origination Year 2023 | 23,301 | 7,827
Amortized Cost Basis by Origination Year 2022 | 6,582 | 3,859
Amortized Cost Basis by Origination Year Prior to 2022 | 5,492 | 3,180
Amortized Cost - Revolving Loans | 400,425 | 426,729
Amortized Cost - Revolving Loans Converted to Term Loans | 479 | 2,258
Total Loans | 490,650 | 521,803
Commercial and Industrial Portfolio [Member] | NDFIs [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2026 | 39,118 | 130,392
Amortized Cost Basis by Origination Year 2025 | 190,987 | 286,076
Amortized Cost Basis by Origination Year 2024 | 282,494 | 368,137
Amortized Cost Basis by Origination Year 2023 | 360,651 | 86,436
Amortized Cost Basis by Origination Year 2022 | 60,399 | 12,136
Amortized Cost Basis by Origination Year Prior to 2022 | 27,655 | 29,406
Amortized Cost - Revolving Loans | 1,674,758 | 1,517,283
Amortized Cost - Revolving Loans Converted to Term Loans |  | 271
Total Loans | 2,636,062 | 2,430,137
Commercial and Industrial Portfolio [Member] | Overdrafts [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost - Revolving Loans | 11,143 | 17,377
Total Loans | 11,143 | 17,377
Specialty Lending Portfolio [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2026 | 51,006 | 46,480
Amortized Cost Basis by Origination Year 2025 | 45,458 | 5,639
Amortized Cost Basis by Origination Year 2024 | 5,528 |
Amortized Cost Basis by Origination Year 2023 |  | 5,801
Amortized Cost Basis by Origination Year 2022 | 5,407 | 25,763
Amortized Cost Basis by Origination Year Prior to 2022 | 46,864 | 22,632
Amortized Cost - Revolving Loans | 491,764 | 411,922
Total Loans | 646,027 | 518,237
Specialty Lending Portfolio [Member] | Asset-based Lending [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2026 | 51,006 | 46,480
Amortized Cost Basis by Origination Year 2025 | 45,458 | 5,639
Amortized Cost Basis by Origination Year 2024 | 5,528 |
Amortized Cost Basis by Origination Year 2023 |  | 5,801
Amortized Cost Basis by Origination Year 2022 | 5,407 | 25,763
Amortized Cost Basis by Origination Year Prior to 2022 | 46,864 | 22,632
Amortized Cost - Revolving Loans | 491,764 | 411,922
Total Loans | 646,027 | 518,237
Commercial Real Estate Portfolio [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2026 | 1,280,439 | 4,579,160
Amortized Cost Basis by Origination Year 2025 | 4,202,128 | 2,319,120
Amortized Cost Basis by Origination Year 2024 | 2,334,806 | 2,423,763
Amortized Cost Basis by Origination Year 2024, Current period charge-offs | 403 |
Amortized Cost Basis by Origination Year 2023 | 2,111,109 | 3,033,066
Amortized Cost Basis by Origination Year 2023, Current period charge-offs | 6,145 |
Amortized Cost Basis by Origination Year 2022 | 2,946,474 | 2,091,580
Amortized Cost Basis by Origination Year 2022, Current period charge-offs | 3,221 |
Amortized Cost Basis by Origination Year Prior to 2022 | 3,501,095 | 1,737,343
Amortized Cost Basis by Origination Year Prior to 2022, Current period charge-offs | 995 |
Amortized Cost - Revolving Loans | 250,982 | 191,078
Amortized Cost - Revolving Loans Converted to Term Loans | 37 | 1,129
Total Loans | 16,627,070 | 16,376,239
Total Loans, Current period charge-offs | 10,764 |
Commercial Real Estate Portfolio [Member] | Owner-occupied [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2026 | 272,512 | 1,151,075
Amortized Cost Basis by Origination Year 2025 | 1,130,699 | 529,761
Amortized Cost Basis by Origination Year 2024 | 594,932 | 599,178
Amortized Cost Basis by Origination Year 2023 | 553,366 | 955,385
Amortized Cost Basis by Origination Year 2022 | 938,003 | 775,378
Amortized Cost Basis by Origination Year Prior to 2022 | 1,396,518 | 724,775
Amortized Cost - Revolving Loans | 46,285 | 39,505
Total Loans | 4,932,315 | 4,775,057
Commercial Real Estate Portfolio [Member] | Non-owner-occupied [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2026 | 486,814 | 1,664,285
Amortized Cost Basis by Origination Year 2025 | 1,629,000 | 656,031
Amortized Cost Basis by Origination Year 2024 | 693,463 | 847,458
Amortized Cost Basis by Origination Year 2023 | 682,722 | 1,018,831
Amortized Cost Basis by Origination Year 2022 | 994,330 | 769,616
Amortized Cost Basis by Origination Year Prior to 2022 | 1,310,146 | 736,502
Amortized Cost - Revolving Loans | 41,608 | 41,093
Amortized Cost - Revolving Loans Converted to Term Loans |  | 1,054
Total Loans | 5,838,083 | 5,734,870
Commercial Real Estate Portfolio [Member] | Farmland [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2026 | 27,169 | 258,796
Amortized Cost Basis by Origination Year 2025 | 274,103 | 74,542
Amortized Cost Basis by Origination Year 2024 | 72,016 | 85,814
Amortized Cost Basis by Origination Year 2023 | 81,613 | 131,009
Amortized Cost Basis by Origination Year 2022 | 120,284 | 83,613
Amortized Cost Basis by Origination Year Prior to 2022 | 230,060 | 163,318
Amortized Cost - Revolving Loans | 45,813 | 66,403
Amortized Cost - Revolving Loans Converted to Term Loans |  | 75
Total Loans | 851,058 | 863,570
Commercial Real Estate Portfolio [Member] | 5+ Multi-family [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2026 | 175,875 | 329,902
Amortized Cost Basis by Origination Year 2025 | 205,422 | 179,107
Amortized Cost Basis by Origination Year 2024 | 194,712 | 171,945
Amortized Cost Basis by Origination Year 2023 | 169,618 | 554,125
Amortized Cost Basis by Origination Year 2022 | 509,376 | 434,660
Amortized Cost Basis by Origination Year Prior to 2022 | 523,346 | 96,475
Amortized Cost - Revolving Loans | 10,198 | 10,441
Total Loans | 1,788,547 | 1,776,655
Commercial Real Estate Portfolio [Member] | 1-4 Family Construction [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2026 | 27,446 | 75,849
Amortized Cost Basis by Origination Year 2025 | 53,800 | 11,564
Amortized Cost Basis by Origination Year 2024 | 2,036 | 240
Amortized Cost Basis by Origination Year 2023 | 239 | 520
Amortized Cost Basis by Origination Year 2022 | 518 |
Amortized Cost - Revolving Loans | 3,574 | 1,301
Total Loans | 87,613 | 89,474
Commercial Real Estate Portfolio [Member] | General Construction [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2026 | 290,623 | 1,099,253
Amortized Cost Basis by Origination Year 2025 | 909,104 | 868,115
Amortized Cost Basis by Origination Year 2024 | 777,647 | 719,128
Amortized Cost Basis by Origination Year 2023 | 623,551 | 373,196
Amortized Cost Basis by Origination Year 2022 | 383,963 | 28,313
Amortized Cost Basis by Origination Year Prior to 2022 | 41,025 | 16,273
Amortized Cost - Revolving Loans | 103,504 | 32,335
Amortized Cost - Revolving Loans Converted to Term Loans | 37 |
Total Loans | 3,129,454 | 3,136,613
Consumer Real Estate Portfolio [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2026 | 169,007 | 676,539
Amortized Cost Basis by Origination Year 2025 | 622,055 | 399,776
Amortized Cost Basis by Origination Year 2024 | 370,041 | 384,373
Amortized Cost Basis by Origination Year 2023 | 367,936 | 662,168
Amortized Cost Basis by Origination Year 2023, Current period charge-offs | 367 |
Amortized Cost Basis by Origination Year 2022 | 638,387 | 753,733
Amortized Cost Basis by Origination Year 2022, Current period charge-offs | 64 |
Amortized Cost Basis by Origination Year Prior to 2022 | 1,544,976 | 844,402
Amortized Cost Basis by Origination Year Prior to 2022, Current period charge-offs | 82 |
Amortized Cost - Revolving Loans | 712,907 | 710,133
Amortized Cost - Revolving Loans Converted to Term Loans | 4,419 | 5,344
Total Loans | 4,429,728 | 4,436,468
Total Loans, Current period charge-offs | 513 |
Consumer Real Estate Portfolio [Member] | HELOC [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2026 | 608 | 2,748
Amortized Cost Basis by Origination Year 2025 | 743 | 399
Amortized Cost Basis by Origination Year 2024 | 393 | 756
Amortized Cost Basis by Origination Year 2023 | 1,718 | 2,075
Amortized Cost Basis by Origination Year 2022 | 2,555 | 577
Amortized Cost Basis by Origination Year Prior to 2022 | 8,562 | 7,784
Amortized Cost - Revolving Loans | 700,318 | 698,503
Amortized Cost - Revolving Loans Converted to Term Loans | 4,329 | 5,331
Total Loans | 719,226 | 718,173
Consumer Real Estate Portfolio [Member] | First Lien: 1-4 Family [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2026 | 164,414 | 653,333
Amortized Cost Basis by Origination Year 2025 | 602,689 | 368,156
Amortized Cost Basis by Origination Year 2024 | 341,374 | 364,405
Amortized Cost Basis by Origination Year 2023 | 347,866 | 631,555
Amortized Cost Basis by Origination Year 2022 | 608,389 | 735,751
Amortized Cost Basis by Origination Year Prior to 2022 | 1,513,971 | 830,570
Amortized Cost - Revolving Loans | 6,914 | 6,864
Amortized Cost - Revolving Loans Converted to Term Loans | 90 | 13
Total Loans | 3,585,707 | 3,590,647
Consumer Real Estate Portfolio [Member] | Junior Lien: 1-4 Family [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2026 | 3,985 | 20,458
Amortized Cost Basis by Origination Year 2025 | 18,623 | 31,221
Amortized Cost Basis by Origination Year 2024 | 28,274 | 19,212
Amortized Cost Basis by Origination Year 2023 | 18,352 | 28,538
Amortized Cost Basis by Origination Year 2022 | 27,443 | 17,405
Amortized Cost Basis by Origination Year Prior to 2022 | 22,443 | 6,048
Amortized Cost - Revolving Loans | 5,675 | 4,766
Total Loans | 124,795 | 127,648
Consumer Portfolio [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2026 | 5,577 | 22,571
Amortized Cost Basis by Origination Year 2025 | 19,363 | 18,523
Amortized Cost Basis by Origination Year 2025, Current period charge-offs | 11 |
Amortized Cost Basis by Origination Year 2024 | 16,247 | 13,280
Amortized Cost Basis by Origination Year 2024, Current period charge-offs | 31 |
Amortized Cost Basis by Origination Year 2023 | 11,378 | 11,273
Amortized Cost Basis by Origination Year 2023, Current period charge-offs | 45 |
Amortized Cost Basis by Origination Year 2022 | 9,963 | 1,995
Amortized Cost Basis by Origination Year 2022, Current period charge-offs | 9 |
Amortized Cost Basis by Origination Year Prior to 2022 | 3,267 | 2,046
Amortized Cost Basis by Origination Year Prior to 2022, Current period charge-offs | 8 |
Amortized Cost - Revolving Loans | 167,438 | 169,021
Amortized Cost - Revolving Loans, Current period charge-offs | 981 |
Amortized Cost - Revolving Loans Converted to Term Loans | 2,749 | 102
Total Loans | 235,982 | 238,811
Total Loans, Current period charge-offs | 1,085 |
Consumer Portfolio [Member] | Revolving Line [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2026 |  | 1,485
Amortized Cost Basis by Origination Year 2025 | 1,485 | 34
Amortized Cost Basis by Origination Year 2024 | 34 | 23
Amortized Cost Basis by Origination Year 2023 | 22 | 49
Amortized Cost Basis by Origination Year 2022 | 48 | 24
Amortized Cost Basis by Origination Year Prior to 2022 | 595 | 526
Amortized Cost - Revolving Loans | 147,111 | 160,454
Amortized Cost - Revolving Loans Converted to Term Loans | 2,749 | 102
Total Loans | 152,044 | 162,697
Consumer Portfolio [Member] | Auto [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2026 | 2,427 | 8,179
Amortized Cost Basis by Origination Year 2025 | 7,166 | 7,292
Amortized Cost Basis by Origination Year 2024 | 6,322 | 9,743
Amortized Cost Basis by Origination Year 2023 | 8,319 | 5,307
Amortized Cost Basis by Origination Year 2022 | 4,283 | 1,118
Amortized Cost Basis by Origination Year Prior to 2022 | 876 | 248
Total Loans | 29,393 | 31,887
Consumer Portfolio [Member] | Other [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2026 | 3,150 | 12,907
Amortized Cost Basis by Origination Year 2025 | 10,712 | 11,197
Amortized Cost Basis by Origination Year 2024 | 9,891 | 3,514
Amortized Cost Basis by Origination Year 2023 | 3,037 | 5,917
Amortized Cost Basis by Origination Year 2022 | 5,632 | 853
Amortized Cost Basis by Origination Year Prior to 2022 | 1,796 | 1,272
Amortized Cost - Revolving Loans | 20,327 | 8,567
Total Loans | 54,545 | 44,227
Credit Cards Portfolio [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost - Revolving Loans | 717,831 | 700,733
Amortized Cost - Revolving Loans, Current period charge-offs | 5,876 |
Total Loans | 717,831 | 700,733
Total Loans, Current period charge-offs | 5,876 |
Credit Cards Portfolio [Member] | Consumer [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost - Revolving Loans | 341,393 | 347,749
Total Loans | 341,393 | 347,749
Credit Cards Portfolio [Member] | Commercial [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost - Revolving Loans | 376,438 | 352,984
Total Loans | 376,438 | 352,984
Leases and Other Portfolio [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2026 | 22,966 | 181,160
Amortized Cost Basis by Origination Year 2025 | 166,465 | 16,408
Amortized Cost Basis by Origination Year 2024 | 17,497 | 8,588
Amortized Cost Basis by Origination Year 2023 | 7,386 | 8,713
Amortized Cost Basis by Origination Year 2022 | 7,721 | 7,344
Amortized Cost Basis by Origination Year Prior to 2022 | 12,902 | 2,885
Amortized Cost - Revolving Loans | 173,986 | 13,302
Total Loans | 408,923 | 238,400
Leases and Other Portfolio [Member] | Leases [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year Prior to 2022 | 1,186 | 1,214
Total Loans | 1,186 | 1,214
Leases and Other Portfolio [Member] | Other [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2026 | 22,966 | 181,160
Amortized Cost Basis by Origination Year 2025 | 166,465 | 16,408
Amortized Cost Basis by Origination Year 2024 | 17,497 | 8,588
Amortized Cost Basis by Origination Year 2023 | 7,386 | 8,713
Amortized Cost Basis by Origination Year 2022 | 7,721 | 7,344
Amortized Cost Basis by Origination Year Prior to 2022 | 11,716 | 1,671
Amortized Cost - Revolving Loans | 173,986 | 13,302
Total Loans | $ 407,737 | $ 237,186

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