v3.26.3
Credit Quality - Schedule of Risk Category of Loans by Class of Loans and Leases (Detail) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
Total $ 14,985,145 $ 14,274,274
Owner-Occupied [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 266,840  
2025 365,600 353,313
2024 337,375 362,444
2023 168,828 205,602
2022 283,286 304,730
2021   278,290
Prior 689,525 578,800
Revolving loans amortized cost basis 65,839 62,626
Revolving loans converted to term loans 0 116
Total 2,177,293 2,145,921
Owner-Occupied [Member] | Pass [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 266,840  
2025 365,549 353,313
2024 337,375 362,198
2023 168,575 196,733
2022 278,382 301,328
2021   278,290
Prior 662,382 555,204
Revolving loans amortized cost basis 55,265 51,711
Revolving loans converted to term loans 0 0
Total 2,134,368 2,098,777
Owner-Occupied [Member] | Special Mention [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 51 0
2024 0 0
2023 0 4,842
2022 1,277 0
2021   0
Prior 7,744 3,727
Revolving loans amortized cost basis 7,205 2,695
Revolving loans converted to term loans 0 0
Total 16,277 11,264
Owner-Occupied [Member] | Substandard [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 0 0
2024 0 246
2023 253 4,027
2022 3,627 3,402
2021   0
Prior 19,202 19,671
Revolving loans amortized cost basis 3,369 8,220
Revolving loans converted to term loans 0 116
Total 26,451 35,682
Owner-Occupied [Member] | Doubtful [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 0 0
2024 0 0
2023 0 0
2022 0 0
2021   0
Prior 197 198
Revolving loans amortized cost basis 0 0
Revolving loans converted to term loans 0 0
Total 197 198
Owner-Occupied [Member] | Current-period charge-offs [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 0 0
2024 0 0
2023 0 0
2022 0 0
2021   0
Prior 0 (228)
Revolving loans amortized cost basis 0 0
Revolving loans converted to term loans 0 0
Total 0 (228)
Owner-Occupied [Member] | Current-period recoveries [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 0 0
2024 0 0
2023 0 0
2022 9 14
2021   0
Prior 242 304
Revolving loans amortized cost basis 0 0
Revolving loans converted to term loans 0 0
Total 251 318
Owner-Occupied [Member] | Current-period net (charge-offs) recoveries [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 0 0
2024 0 0
2023 0 0
2022 9 14
2021   0
Prior 242 76
Revolving loans amortized cost basis 0 0
Revolving loans converted to term loans 0 0
Total 251 90
Nonowner-Occupied [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 1,929,686  
2025 1,563,266 1,630,768
2024 1,007,357 856,235
2023 736,050 772,532
2022 1,529,654 2,018,312
2021   1,284,331
Prior 2,101,384 1,615,761
Revolving loans amortized cost basis 165,803 165,581
Revolving loans converted to term loans 0 0
Total 9,033,200 8,343,520
Nonowner-Occupied [Member] | Pass [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 1,929,686  
2025 1,561,307 1,628,785
2024 1,005,582 856,235
2023 710,566 760,043
2022 1,416,103 1,917,759
2021   1,165,300
Prior 1,799,165 1,397,941
Revolving loans amortized cost basis 143,266 143,406
Revolving loans converted to term loans 0 0
Total 8,565,675 7,869,469
Nonowner-Occupied [Member] | Special Mention [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 1,959 1,983
2024 0 0
2023 16,608 7,058
2022 72,704 51,603
2021   113,708
Prior 209,219 120,213
Revolving loans amortized cost basis 0 0
Revolving loans converted to term loans 0 0
Total 300,490 294,565
Nonowner-Occupied [Member] | Substandard [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 0 0
2024 1,775 0
2023 8,876 5,431
2022 40,847 48,950
2021   5,323
Prior 93,000 97,607
Revolving loans amortized cost basis 22,537 22,175
Revolving loans converted to term loans 0 0
Total 167,035 179,486
Nonowner-Occupied [Member] | Doubtful [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 0 0
2024 0 0
2023 0 0
2022 0 0
2021   0
Prior 0 0
Revolving loans amortized cost basis 0 0
Revolving loans converted to term loans 0 0
Total 0 0
Nonowner-Occupied [Member] | Current-period charge-offs [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 0 0
2024 0 0
2023 0 0
2022 0 0
2021   0
Prior (15,560) (35,798)
Revolving loans amortized cost basis 0 0
Revolving loans converted to term loans 0 0
Total (15,560) (35,798)
Nonowner-Occupied [Member] | Current-period recoveries [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 0 0
2024 0 0
2023 0 0
2022 0 0
2021   0
Prior 75 160
Revolving loans amortized cost basis 0 0
Revolving loans converted to term loans 0 0
Total 75 160
Nonowner-Occupied [Member] | Current-period net (charge-offs) recoveries [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 0 0
2024 0 0
2023 0 0
2022 0 0
2021   0
Prior (15,485) (35,638)
Revolving loans amortized cost basis 0 0
Revolving loans converted to term loans 0 0
Total (15,485) (35,638)
Other Commercial Loans [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 407,918  
2025 563,632 628,602
2024 296,766 375,820
2023 361,432 475,304
2022 123,108 221,616
2021   332,478
Prior 872,257 627,305
Revolving loans amortized cost basis 1,149,519 1,123,661
Revolving loans converted to term loans 20 47
Total 3,774,652 3,784,833
Other Commercial Loans [Member] | Pass [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 407,844  
2025 563,577 628,597
2024 293,922 373,700
2023 358,820 472,334
2022 122,063 214,442
2021   324,424
Prior 835,809 600,824
Revolving loans amortized cost basis 1,146,704 1,117,879
Revolving loans converted to term loans 20 47
Total 3,728,759 3,732,247
Other Commercial Loans [Member] | Special Mention [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 74  
2025 0 5
2024 398 431
2023 221 117
2022 292 949
2021   1,128
Prior 11,553 9,012
Revolving loans amortized cost basis 261 458
Revolving loans converted to term loans 0 0
Total 12,799 12,100
Other Commercial Loans [Member] | Substandard [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 55 0
2024 2,446 1,689
2023 2,391 2,853
2022 753 6,225
2021   6,926
Prior 24,895 17,469
Revolving loans amortized cost basis 2,554 5,324
Revolving loans converted to term loans 0 0
Total 33,094 40,486
Other Commercial Loans [Member] | Doubtful [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 0 0
2024 0 0
2023 0 0
2022 0 0
2021   0
Prior 0 0
Revolving loans amortized cost basis 0 0
Revolving loans converted to term loans 0 0
Total 0 0
Other Commercial Loans [Member] | Current-period charge-offs [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 (60)  
2025 (13) 0
2024 (170) (48)
2023 (268) (150)
2022 (602) (229)
2021   (1,625)
Prior (4,032) (2,459)
Revolving loans amortized cost basis (1,058) (913)
Revolving loans converted to term loans 0 0
Total (6,203) (5,424)
Other Commercial Loans [Member] | Current-period recoveries [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 5 0
2024 1 0
2023 62 27
2022 0 75
2021   32
Prior 895 2,111
Revolving loans amortized cost basis 30 64
Revolving loans converted to term loans 0 0
Total 993 2,309
Other Commercial Loans [Member] | Current-period net (charge-offs) recoveries [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 (60)  
2025 (8) 0
2024 (169) (48)
2023 (206) (123)
2022 (602) (154)
2021   (1,593)
Prior (3,137) (348)
Revolving loans amortized cost basis (1,028) (849)
Revolving loans converted to term loans 0 0
Total (5,210) (3,115)
Residential Real Estate [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 782,167  
2025 777,444 746,665
2024 400,870 428,121
2023 633,119 785,205
2022 1,402,425 1,608,513
2021   830,732
Prior 1,726,790 1,164,513
Revolving loans amortized cost basis 534,559 534,353
Revolving loans converted to term loans 138 160
Total 6,257,512 6,098,262
Residential Real Estate [Member] | Pass [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 782,157  
2025 777,444 746,665
2024 400,403 427,238
2023 631,637 784,994
2022 1,402,225 1,608,513
2021   822,932
Prior 1,706,843 1,148,481
Revolving loans amortized cost basis 533,853 533,509
Revolving loans converted to term loans 138 160
Total 6,234,700 6,072,492
Residential Real Estate [Member] | Special Mention [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 10  
2025 0 0
2024 161 476
2023 651 104
2022 0 0
2021   0
Prior 1,819 4,048
Revolving loans amortized cost basis 584 637
Revolving loans converted to term loans 0 0
Total 3,225 5,265
Residential Real Estate [Member] | Substandard [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 0 0
2024 306 407
2023 831 107
2022 200 0
2021   7,800
Prior 18,128 11,984
Revolving loans amortized cost basis 122 207
Revolving loans converted to term loans 0 0
Total 19,587 20,505
Residential Real Estate [Member] | Doubtful [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 0 0
2024 0 0
2023 0 0
2022 0 0
2021   0
Prior 0 0
Revolving loans amortized cost basis 0 0
Revolving loans converted to term loans 0 0
Total 0 0
Residential Real Estate [Member] | Current-period charge-offs [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 0 0
2024 0 (67)
2023 (74) (205)
2022 0 (189)
2021   (6)
Prior (277) (532)
Revolving loans amortized cost basis 0 0
Revolving loans converted to term loans 0 0
Total (351) (999)
Residential Real Estate [Member] | Current-period recoveries [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 0 0
2024 0 0
2023 0 0
2022 16 0
2021   2
Prior 72 701
Revolving loans amortized cost basis 12 1
Revolving loans converted to term loans 0 0
Total 100 704
Residential Real Estate [Member] | Current-period net (charge-offs) recoveries [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 0 0
2024 0 (67)
2023 (74) (205)
2022 16 (189)
2021   (4)
Prior (205) 169
Revolving loans amortized cost basis 12 1
Revolving loans converted to term loans 0 0
Total (251) (295)
Construction & Land Development [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 726,331  
2025 955,507 1,031,756
2024 734,551 995,673
2023 399,290 728,729
2022 189,080 401,845
2021   69,668
Prior 121,979 37,481
Revolving loans amortized cost basis 271,688 305,750
Revolving loans converted to term loans 0 0
Total 3,398,426 3,570,902
Construction & Land Development [Member] | Pass [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 726,331  
2025 954,108 1,031,215
2024 727,701 992,846
2023 383,801 693,752
2022 176,688 401,811
2021   65,460
Prior 64,965 27,716
Revolving loans amortized cost basis 271,588 305,750
Revolving loans converted to term loans 0 0
Total 3,305,182 3,518,550
Construction & Land Development [Member] | Special Mention [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 0 0
2024 6,545 2,827
2023 12,160 30,509
2022 12,093 0
2021   4,208
Prior 49,559 8,281
Revolving loans amortized cost basis 0 0
Revolving loans converted to term loans 0 0
Total 80,357 45,825
Construction & Land Development [Member] | Substandard [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 1,399 541
2024 305 0
2023 3,329 4,468
2022 299 34
2021   0
Prior 7,455 1,484
Revolving loans amortized cost basis 100 0
Revolving loans converted to term loans 0 0
Total 12,887 6,527
Construction & Land Development [Member] | Doubtful [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 0 0
2024 0 0
2023 0 0
2022 0 0
2021   0
Prior 0 0
Revolving loans amortized cost basis 0 0
Revolving loans converted to term loans 0 0
Total 0 0
Construction & Land Development [Member] | Current-period charge-offs [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 0 0
2024 0 0
2023 0 (141)
2022 0 0
2021   (103)
Prior 0 (164)
Revolving loans amortized cost basis 0 0
Revolving loans converted to term loans 0 0
Total 0 (408)
Construction & Land Development [Member] | Current-period recoveries [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 0 0
2024 0 0
2023 1 0
2022 0 0
2021   0
Prior 351 225
Revolving loans amortized cost basis 0 0
Revolving loans converted to term loans 0 0
Total 352 225
Construction & Land Development [Member] | Current-period net (charge-offs) recoveries [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 0 0
2024 0 0
2023 1 (141)
2022 0 0
2021   (103)
Prior 351 61
Revolving loans amortized cost basis 0 0
Revolving loans converted to term loans 0 0
Total 352 (183)
Bankcard [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 0 0
2024 0 0
2023 0 0
2022 0 0
2021   0
Prior 0 0
Revolving loans amortized cost basis 9,215 9,686
Revolving loans converted to term loans 0 0
Total 9,215 9,686
Bankcard [Member] | Pass [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 0 0
2024 0 0
2023 0 0
2022 0 0
2021   0
Prior 0 0
Revolving loans amortized cost basis 9,086 9,603
Revolving loans converted to term loans 0 0
Total 9,086 9,603
Bankcard [Member] | Special Mention [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 0 0
2024 0 0
2023 0 0
2022 0 0
2021   0
Prior 0 0
Revolving loans amortized cost basis 82 28
Revolving loans converted to term loans 0 0
Total 82 28
Bankcard [Member] | Substandard [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 0 0
2024 0 0
2023 0 0
2022 0 0
2021   0
Prior 0 0
Revolving loans amortized cost basis 47 55
Revolving loans converted to term loans 0 0
Total 47 55
Bankcard [Member] | Doubtful [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 0 0
2024 0 0
2023 0 0
2022 0 0
2021   0
Prior 0 0
Revolving loans amortized cost basis 0 0
Revolving loans converted to term loans 0 0
Total 0 0
Bankcard [Member] | Current-period charge-offs [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 0 0
2024 0 0
2023 0 0
2022 0 0
2021   0
Prior 0 0
Revolving loans amortized cost basis (174) (320)
Revolving loans converted to term loans 0 0
Total (174) (320)
Bankcard [Member] | Current-period recoveries [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 0 0
2024 0 0
2023 0 0
2022 0 0
2021   0
Prior 0 0
Revolving loans amortized cost basis 27 55
Revolving loans converted to term loans 0 0
Total 27 55
Bankcard [Member] | Current-period net (charge-offs) recoveries [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 0 0
2024 0 0
2023 0 0
2022 0 0
2021   0
Prior 0 0
Revolving loans amortized cost basis (147) (265)
Revolving loans converted to term loans 0 0
Total (147) (265)
Other Consumer [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 320,306  
2025 259,463 346,960
2024 62,647 91,126
2023 50,527 80,262
2022 95,258 164,578
2021   62,245
Prior 33,079 20,201
Revolving loans amortized cost basis 1,904 2,124
Revolving loans converted to term loans 0 0
Total 823,184 767,496
Other Consumer [Member] | Pass [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 319,742  
2025 258,035 346,057
2024 62,202 90,623
2023 49,835 79,353
2022 91,135 157,220
2021   57,987
Prior 30,887 18,929
Revolving loans amortized cost basis 1,890 2,104
Revolving loans converted to term loans 0 0
Total 813,726 752,273
Other Consumer [Member] | Special Mention [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 522  
2025 1,329 682
2024 439 446
2023 658 821
2022 3,751 6,741
2021   3,794
Prior 1,958 1,171
Revolving loans amortized cost basis 14 13
Revolving loans converted to term loans 0 0
Total 8,671 13,668
Other Consumer [Member] | Substandard [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 42  
2025 99 221
2024 6 57
2023 34 88
2022 372 617
2021   464
Prior 234 101
Revolving loans amortized cost basis 0 7
Revolving loans converted to term loans 0 0
Total 787 1,555
Other Consumer [Member] | Doubtful [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 0 0
2024 0 0
2023 0 0
2022 0 0
2021   0
Prior 0 0
Revolving loans amortized cost basis 0 0
Revolving loans converted to term loans 0 0
Total 0 0
Other Consumer [Member] | Current-period charge-offs [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 (18)  
2025 (354) (15)
2024 (25) (185)
2023 (167) (507)
2022 (1,426) (4,547)
2021   (1,698)
Prior (948) (783)
Revolving loans amortized cost basis 0 0
Revolving loans converted to term loans 0 0
Total (2,938) (7,735)
Other Consumer [Member] | Current-period recoveries [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 4  
2025 21 0
2024 14 7
2023 29 78
2022 452 642
2021   273
Prior 555 429
Revolving loans amortized cost basis 0 0
Revolving loans converted to term loans 0 0
Total 1,075 1,429
Other Consumer [Member] | Current-period net (charge-offs) recoveries [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 (14)  
2025 (333) (15)
2024 (11) (178)
2023 (138) (429)
2022 (974) (3,905)
2021   (1,425)
Prior (393) (354)
Revolving loans amortized cost basis 0 0
Revolving loans converted to term loans 0 0
Total $ (1,863) $ (6,306)