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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
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