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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 | Sep. 30, 2025 | Dec. 31, 2024
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2025 | $ 6,075,831 | $ 4,707,447
Amortized Cost Basis by Origination Year 2024 | 5,277,681 | 3,346,757
Amortized Cost Basis by Origination Year 2023 | 4,790,722 | 4,807,943
Amortized Cost Basis by Origination Year 2022 | 5,343,541 | 3,099,880
Amortized Cost Basis by Origination Year 2021 | 3,681,344 | 1,751,555
Amortized Cost Basis by Origination Year Prior to 2021 | 3,329,171 | 1,072,516
Amortized Cost - Revolving Loans | 9,028,419 | 6,808,094
Amortized Cost - Revolving Loans Converted to Term Loans | 179,798 | 48,109
Total Loans | 37,706,507 | 25,642,301
Commercial and Industrial Portfolio [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2025 | 2,221,480 | 2,330,176
Amortized Cost Basis by Origination Year 2024 | 2,454,036 | 1,402,318
Amortized Cost Basis by Origination Year 2024, Current period charge-offs | 7,296 |
Amortized Cost Basis by Origination Year 2023 | 1,556,730 | 1,014,396
Amortized Cost Basis by Origination Year 2023, Current period charge-offs | 7,124 |
Amortized Cost Basis by Origination Year 2022 | 1,135,658 | 693,959
Amortized Cost Basis by Origination Year 2022, Current period charge-offs | 6,687 |
Amortized Cost Basis by Origination Year 2021 | 569,782 | 303,996
Amortized Cost Basis by Origination Year 2021, Current period charge-offs | 1,552 |
Amortized Cost Basis by Origination Year Prior to 2021 | 404,265 | 144,249
Amortized Cost Basis by Origination Year Prior to 2021, Current period charge-offs | 956 |
Amortized Cost - Revolving Loans | 6,836,927 | 5,084,321
Amortized Cost - Revolving Loans, Current period charge-offs | 14,420 |
Amortized Cost - Revolving Loans Converted to Term Loans | 19,204 | 20,356
Total Loans | 15,198,082 | 10,993,771
Total Loans, Current period charge-offs | 38,035 |
Commercial and Industrial Portfolio [Member] | Equipment/Accounts Receivable/Inventory [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2025 | 2,050,313 | 2,054,295
Amortized Cost Basis by Origination Year 2024 | 2,144,396 | 1,045,835
Amortized Cost Basis by Origination Year 2023 | 1,174,588 | 916,112
Amortized Cost Basis by Origination Year 2022 | 1,076,786 | 682,754
Amortized Cost Basis by Origination Year 2021 | 550,762 | 293,173
Amortized Cost Basis by Origination Year Prior to 2021 | 369,057 | 135,072
Amortized Cost - Revolving Loans | 5,275,337 | 3,975,094
Amortized Cost - Revolving Loans Converted to Term Loans | 18,774 | 20,356
Total Loans | 12,660,013 | 9,122,691
Commercial and Industrial Portfolio [Member] | Agriculture [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2025 | 22,456 | 9,857
Amortized Cost Basis by Origination Year 2024 | 43,536 | 5,750
Amortized Cost Basis by Origination Year 2023 | 26,417 | 3,554
Amortized Cost Basis by Origination Year 2022 | 8,527 | 2,208
Amortized Cost Basis by Origination Year 2021 | 5,212 | 356
Amortized Cost Basis by Origination Year Prior to 2021 | 3,616 | 97
Amortized Cost - Revolving Loans | 263,460 | 156,546
Amortized Cost - Revolving Loans Converted to Term Loans | 295 |
Total Loans | 373,519 | 178,368
Commercial and Industrial Portfolio [Member] | NDFIs [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2025 | 148,711 | 266,024
Amortized Cost Basis by Origination Year 2024 | 266,104 | 350,733
Amortized Cost Basis by Origination Year 2023 | 355,725 | 94,730
Amortized Cost Basis by Origination Year 2022 | 50,345 | 8,997
Amortized Cost Basis by Origination Year 2021 | 13,808 | 10,467
Amortized Cost Basis by Origination Year Prior to 2021 | 31,592 | 9,080
Amortized Cost - Revolving Loans | 1,268,919 | 941,454
Amortized Cost - Revolving Loans Converted to Term Loans | 135 |
Total Loans | 2,135,339 | 1,681,485
Commercial and Industrial Portfolio [Member] | Overdrafts [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost - Revolving Loans | 29,211 | 11,227
Total Loans | 29,211 | 11,227
Specialty Lending Portfolio [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2025 | 35,381 | 5,803
Amortized Cost Basis by Origination Year 2024 | 5,927 |
Amortized Cost Basis by Origination Year 2023 |  | 8,026
Amortized Cost Basis by Origination Year 2022 | 6,053 | 30,702
Amortized Cost Basis by Origination Year 2021 | 32,203 | 29,392
Amortized Cost Basis by Origination Year Prior to 2021 | 33,107 |
Amortized Cost - Revolving Loans | 448,723 | 395,271
Total Loans | 561,394 | 469,194
Specialty Lending Portfolio [Member] | Asset-based Lending [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2025 | 35,381 | 5,803
Amortized Cost Basis by Origination Year 2024 | 5,927 |
Amortized Cost Basis by Origination Year 2023 |  | 8,026
Amortized Cost Basis by Origination Year 2022 | 6,053 | 30,702
Amortized Cost Basis by Origination Year 2021 | 32,203 | 29,392
Amortized Cost Basis by Origination Year Prior to 2021 | 33,107 |
Amortized Cost - Revolving Loans | 448,723 | 395,271
Total Loans | 561,394 | 469,194
Commercial Real Estate Portfolio [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2025 | 3,245,953 | 1,893,193
Amortized Cost Basis by Origination Year 2024 | 2,365,346 | 1,545,585
Amortized Cost Basis by Origination Year 2023 | 2,806,541 | 3,183,167
Amortized Cost Basis by Origination Year 2023, Current period charge-offs | 5,295 |
Amortized Cost Basis by Origination Year 2022 | 3,532,332 | 1,698,087
Amortized Cost Basis by Origination Year 2022, Current period charge-offs | 680 |
Amortized Cost Basis by Origination Year 2021 | 2,291,887 | 914,791
Amortized Cost Basis by Origination Year 2021, Current period charge-offs | 849 |
Amortized Cost Basis by Origination Year Prior to 2021 | 2,002,357 | 642,308
Amortized Cost Basis by Origination Year Prior to 2021, Current period charge-offs | 4,250 |
Amortized Cost - Revolving Loans | 181,663 | 228,885
Amortized Cost - Revolving Loans Converted to Term Loans | 157,016 | 25,269
Total Loans | 16,583,095 | 10,131,285
Total Loans, Current period charge-offs | 11,074 |
Commercial Real Estate Portfolio [Member] | Owner-occupied [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2025 | 901,661 | 352,517
Amortized Cost Basis by Origination Year 2024 | 503,574 | 277,049
Amortized Cost Basis by Origination Year 2023 | 635,472 | 593,480
Amortized Cost Basis by Origination Year 2022 | 1,032,953 | 442,805
Amortized Cost Basis by Origination Year 2021 | 830,103 | 293,799
Amortized Cost Basis by Origination Year Prior to 2021 | 799,917 | 275,207
Amortized Cost - Revolving Loans | 40,081 | 4,948
Amortized Cost - Revolving Loans Converted to Term Loans | 2,804 | 25,266
Total Loans | 4,746,565 | 2,265,071
Commercial Real Estate Portfolio [Member] | Non-owner-occupied [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2025 | 1,354,864 | 784,434
Amortized Cost Basis by Origination Year 2024 | 702,128 | 527,773
Amortized Cost Basis by Origination Year 2023 | 1,018,368 | 1,006,769
Amortized Cost Basis by Origination Year 2022 | 1,089,774 | 727,365
Amortized Cost Basis by Origination Year 2021 | 850,794 | 404,362
Amortized Cost Basis by Origination Year Prior to 2021 | 915,711 | 324,839
Amortized Cost - Revolving Loans | 47,617 | 32,312
Total Loans | 5,979,256 | 3,807,854
Commercial Real Estate Portfolio [Member] | Farmland [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2025 | 136,277 | 54,656
Amortized Cost Basis by Origination Year 2024 | 80,576 | 47,357
Amortized Cost Basis by Origination Year 2023 | 93,007 | 58,154
Amortized Cost Basis by Origination Year 2022 | 135,288 | 36,127
Amortized Cost Basis by Origination Year 2021 | 90,647 | 183,762
Amortized Cost Basis by Origination Year Prior to 2021 | 177,577 | 23,016
Amortized Cost - Revolving Loans | 45,669 | 107,468
Amortized Cost - Revolving Loans Converted to Term Loans | 86,787 | 3
Total Loans | 845,828 | 510,543
Commercial Real Estate Portfolio [Member] | 5+ Multi-family [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2025 | 205,011 | 161,767
Amortized Cost Basis by Origination Year 2024 | 229,323 | 47,136
Amortized Cost Basis by Origination Year 2023 | 100,067 | 302,225
Amortized Cost Basis by Origination Year 2022 | 598,814 | 256,032
Amortized Cost Basis by Origination Year 2021 | 368,199 | 28,819
Amortized Cost Basis by Origination Year Prior to 2021 | 101,411 | 18,732
Amortized Cost - Revolving Loans | 8,862 | 9,202
Total Loans | 1,611,687 | 823,913
Commercial Real Estate Portfolio [Member] | 1-4 Family Construction [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2025 | 49,100 | 46,096
Amortized Cost Basis by Origination Year 2024 | 48,149 | 1,385
Amortized Cost Basis by Origination Year 2023 | 890 |
Amortized Cost Basis by Origination Year 2022 | 729 |
Amortized Cost Basis by Origination Year Prior to 2021 | 25 |
Amortized Cost - Revolving Loans | 221 | 5
Total Loans | 99,114 | 47,486
Commercial Real Estate Portfolio [Member] | General Construction [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2025 | 599,040 | 493,723
Amortized Cost Basis by Origination Year 2024 | 801,596 | 644,885
Amortized Cost Basis by Origination Year 2023 | 958,737 | 1,222,539
Amortized Cost Basis by Origination Year 2022 | 674,774 | 235,758
Amortized Cost Basis by Origination Year 2021 | 152,144 | 4,049
Amortized Cost Basis by Origination Year Prior to 2021 | 7,716 | 514
Amortized Cost - Revolving Loans | 39,213 | 74,950
Amortized Cost - Revolving Loans Converted to Term Loans | 67,425 |
Total Loans | 3,300,645 | 2,676,418
Consumer Real Estate Portfolio [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2025 | 512,339 | 426,001
Amortized Cost Basis by Origination Year 2024 | 412,530 | 371,227
Amortized Cost Basis by Origination Year 2023 | 397,190 | 575,471
Amortized Cost Basis by Origination Year 2023, Current period charge-offs | 130 |
Amortized Cost Basis by Origination Year 2022 | 644,869 | 639,650
Amortized Cost Basis by Origination Year 2022, Current period charge-offs | 201 |
Amortized Cost Basis by Origination Year 2021 | 777,208 | 500,026
Amortized Cost Basis by Origination Year 2021, Current period charge-offs | 711 |
Amortized Cost Basis by Origination Year Prior to 2021 | 884,257 | 281,353
Amortized Cost Basis by Origination Year Prior to 2021, Current period charge-offs | 546 |
Amortized Cost - Revolving Loans | 711,645 | 390,918
Amortized Cost - Revolving Loans, Current period charge-offs | 462 |
Amortized Cost - Revolving Loans Converted to Term Loans | 2,521 | 2,484
Total Loans | 4,342,559 | 3,187,130
Total Loans, Current period charge-offs | 2,050 |
Consumer Real Estate Portfolio [Member] | HELOC [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2025 | 2,855 | 90
Amortized Cost Basis by Origination Year 2024 | 198 | 16
Amortized Cost Basis by Origination Year 2023 | 836 | 450
Amortized Cost Basis by Origination Year 2022 | 1,972 | 455
Amortized Cost Basis by Origination Year 2021 | 826 | 334
Amortized Cost Basis by Origination Year Prior to 2021 | 7,449 | 5,049
Amortized Cost - Revolving Loans | 696,114 | 390,843
Amortized Cost - Revolving Loans Converted to Term Loans | 2,178 | 2,484
Total Loans | 712,428 | 399,721
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 2025 | 489,549 | 413,395
Amortized Cost Basis by Origination Year 2024 | 379,598 | 361,242
Amortized Cost Basis by Origination Year 2023 | 376,497 | 565,017
Amortized Cost Basis by Origination Year 2022 | 611,931 | 635,217
Amortized Cost Basis by Origination Year 2021 | 758,036 | 496,758
Amortized Cost Basis by Origination Year Prior to 2021 | 869,513 | 273,628
Amortized Cost - Revolving Loans | 10,364 |
Amortized Cost - Revolving Loans Converted to Term Loans | 343 |
Total Loans | 3,495,831 | 2,745,257
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 2025 | 19,935 | 12,516
Amortized Cost Basis by Origination Year 2024 | 32,734 | 9,969
Amortized Cost Basis by Origination Year 2023 | 19,857 | 10,004
Amortized Cost Basis by Origination Year 2022 | 30,966 | 3,978
Amortized Cost Basis by Origination Year 2021 | 18,346 | 2,934
Amortized Cost Basis by Origination Year Prior to 2021 | 7,295 | 2,676
Amortized Cost - Revolving Loans | 5,167 | 75
Total Loans | 134,300 | 42,152
Consumer Portfolio [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2025 | 14,709 | 21,652
Amortized Cost Basis by Origination Year 2025, Current period charge-offs | 1 |
Amortized Cost Basis by Origination Year 2024 | 20,650 | 10,305
Amortized Cost Basis by Origination Year 2024, Current period charge-offs | 73 |
Amortized Cost Basis by Origination Year 2023 | 15,820 | 13,599
Amortized Cost Basis by Origination Year 2023, Current period charge-offs | 230 |
Amortized Cost Basis by Origination Year 2022 | 14,866 | 27,587
Amortized Cost Basis by Origination Year 2022, Current period charge-offs | 163 |
Amortized Cost Basis by Origination Year 2021 | 2,612 | 1,015
Amortized Cost Basis by Origination Year 2021, Current period charge-offs | 10 |
Amortized Cost Basis by Origination Year Prior to 2021 | 1,820 | 1,079
Amortized Cost Basis by Origination Year Prior to 2021, Current period charge-offs | 110 |
Amortized Cost - Revolving Loans | 151,919 | 118,623
Amortized Cost - Revolving Loans, Current period charge-offs | 1,666 |
Amortized Cost - Revolving Loans Converted to Term Loans | 1,057 |
Total Loans | 223,453 | 193,860
Total Loans, Current period charge-offs | 2,253 |
Consumer Portfolio [Member] | Revolving Line [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2025 | 999 | 35
Amortized Cost Basis by Origination Year 2024 | 34 |
Amortized Cost Basis by Origination Year 2023 | 9 |
Amortized Cost Basis by Origination Year 2022 | 37 |
Amortized Cost Basis by Origination Year 2021 | 25 |
Amortized Cost Basis by Origination Year Prior to 2021 | 542 |
Amortized Cost - Revolving Loans | 151,919 | 101,407
Amortized Cost - Revolving Loans Converted to Term Loans | 1,057 |
Total Loans | 154,622 | 101,442
Consumer Portfolio [Member] | Auto [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2025 | 7,103 | 8,567
Amortized Cost Basis by Origination Year 2024 | 8,452 | 7,429
Amortized Cost Basis by Origination Year 2023 | 11,651 | 3,534
Amortized Cost Basis by Origination Year 2022 | 6,235 | 1,928
Amortized Cost Basis by Origination Year 2021 | 1,623 | 673
Amortized Cost Basis by Origination Year Prior to 2021 | 424 | 283
Total Loans | 35,488 | 22,414
Consumer Portfolio [Member] | Other [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2025 | 6,607 | 13,050
Amortized Cost Basis by Origination Year 2024 | 12,164 | 2,876
Amortized Cost Basis by Origination Year 2023 | 4,160 | 10,065
Amortized Cost Basis by Origination Year 2022 | 8,594 | 25,659
Amortized Cost Basis by Origination Year 2021 | 964 | 342
Amortized Cost Basis by Origination Year Prior to 2021 | 854 | 796
Amortized Cost - Revolving Loans |  | 17,216
Total Loans | 33,343 | 70,004
Credit Cards Portfolio [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost - Revolving Loans | 689,807 | 578,766
Amortized Cost - Revolving Loans, Current period charge-offs | 20,020 |
Total Loans | 689,807 | 578,766
Total Loans, Current period charge-offs | 20,020 |
Credit Cards Portfolio [Member] | Consumer [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost - Revolving Loans | 322,970 | 328,474
Total Loans | 322,970 | 328,474
Credit Cards Portfolio [Member] | Commercial [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost - Revolving Loans | 366,837 | 250,292
Total Loans | 366,837 | 250,292
Leases and Other Portfolio [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2025 | 45,969 | 30,622
Amortized Cost Basis by Origination Year 2024 | 19,192 | 17,322
Amortized Cost Basis by Origination Year 2024, Current period charge-offs | 7 |
Amortized Cost Basis by Origination Year 2023 | 14,441 | 13,284
Amortized Cost Basis by Origination Year 2022 | 9,763 | 9,895
Amortized Cost Basis by Origination Year 2021 | 7,652 | 2,335
Amortized Cost Basis by Origination Year Prior to 2021 | 3,365 | 3,527
Amortized Cost - Revolving Loans | 7,735 | 11,310
Total Loans | 108,117 | 88,295
Total Loans, Current period charge-offs | 7 |
Leases and Other Portfolio [Member] | Leases [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year Prior to 2021 | 1,276 | 1,492
Total Loans | 1,276 | 1,492
Leases and Other Portfolio [Member] | Other [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis by Origination Year 2025 | 45,969 | 30,622
Amortized Cost Basis by Origination Year 2024 | 19,192 | 17,322
Amortized Cost Basis by Origination Year 2023 | 14,441 | 13,284
Amortized Cost Basis by Origination Year 2022 | 9,763 | 9,895
Amortized Cost Basis by Origination Year 2021 | 7,652 | 2,335
Amortized Cost Basis by Origination Year Prior to 2021 | 2,089 | 2,035
Amortized Cost - Revolving Loans | 7,735 | 11,310
Total Loans | $ 106,841 | $ 86,803

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