v3.26.1
Credit Quality - Schedule of Risk Category of Loans by Class of Loans and Leases (Detail) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
Total $ 14,699,514 $ 14,274,274
Owner-Occupied [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 166,142  
2025 371,402 353,313
2024 344,710 362,444
2023 190,685 205,602
2022 278,983 304,730
2021   278,290
Prior 755,079 578,800
Revolving loans amortized cost basis 63,899 62,626
Revolving loans converted to term loans 0 116
Total 2,170,900 2,145,921
Owner-Occupied [Member] | Pass [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 166,142  
2025 370,636 353,313
2024 344,710 362,198
2023 190,172 196,733
2022 275,178 301,328
2021   278,290
Prior 732,303 555,204
Revolving loans amortized cost basis 52,892 51,711
Revolving loans converted to term loans 0 0
Total 2,132,033 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 271 4,842
2022 144 0
2021   0
Prior 3,204 3,727
Revolving loans amortized cost basis 0 2,695
Revolving loans converted to term loans 0 0
Total 3,670 11,264
Owner-Occupied [Member] | Substandard [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 715 0
2024 0 246
2023 242 4,027
2022 3,661 3,402
2021   0
Prior 19,378 19,671
Revolving loans amortized cost basis 11,007 8,220
Revolving loans converted to term loans 0 116
Total 35,003 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 194 198
Revolving loans amortized cost basis 0 0
Revolving loans converted to term loans 0 0
Total 194 198
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 7 14
2021   0
Prior 228 304
Revolving loans amortized cost basis 0 0
Revolving loans converted to term loans 0 0
Total 235 318
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 7 14
2021   0
Prior 228 76
Revolving loans amortized cost basis 0 0
Revolving loans converted to term loans 0 0
Total 235 90
Nonowner-Occupied [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 1,142,967  
2025 1,708,328 1,630,768
2024 994,132 856,235
2023 689,796 772,532
2022 1,651,605 2,018,312
2021   1,284,331
Prior 2,407,482 1,615,761
Revolving loans amortized cost basis 127,317 165,581
Revolving loans converted to term loans 0 0
Total 8,721,627 8,343,520
Nonowner-Occupied [Member] | Pass [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 1,142,967  
2025 1,706,361 1,628,785
2024 987,376 856,235
2023 667,400 760,043
2022 1,572,441 1,917,759
2021   1,165,300
Prior 2,084,683 1,397,941
Revolving loans amortized cost basis 104,910 143,406
Revolving loans converted to term loans 0 0
Total 8,266,138 7,869,469
Nonowner-Occupied [Member] | Special Mention [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 1,967 1,983
2024 6,748 0
2023 13,508 7,058
2022 38,250 51,603
2021   113,708
Prior 225,904 120,213
Revolving loans amortized cost basis 0 0
Revolving loans converted to term loans 0 0
Total 286,377 294,565
Nonowner-Occupied [Member] | Substandard [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 0 0
2024 8 0
2023 8,888 5,431
2022 40,914 48,950
2021   5,323
Prior 96,895 97,607
Revolving loans amortized cost basis 22,407 22,175
Revolving loans converted to term loans 0 0
Total 169,112 179,486
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 (4,918) (35,798)
Revolving loans amortized cost basis 0 0
Revolving loans converted to term loans 0 0
Total (4,918) (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 74 160
Revolving loans amortized cost basis 0 0
Revolving loans converted to term loans 0 0
Total 74 160
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 (4,844) (35,638)
Revolving loans amortized cost basis 0 0
Revolving loans converted to term loans 0 0
Total (4,844) (35,638)
Other Commercial Loans [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 209,621  
2025 592,891 628,602
2024 345,474 375,820
2023 428,949 475,304
2022 184,368 221,616
2021   332,478
Prior 845,488 627,305
Revolving loans amortized cost basis 1,200,167 1,123,661
Revolving loans converted to term loans 29 47
Total 3,806,987 3,784,833
Other Commercial Loans [Member] | Pass [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 209,541  
2025 592,836 628,597
2024 342,487 373,700
2023 423,328 472,334
2022 178,891 214,442
2021   324,424
Prior 813,484 600,824
Revolving loans amortized cost basis 1,194,096 1,117,879
Revolving loans converted to term loans 29 47
Total 3,754,692 3,732,247
Other Commercial Loans [Member] | Special Mention [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 80  
2025 0 5
2024 1,571 431
2023 3,232 117
2022 344 949
2021   1,128
Prior 408 9,012
Revolving loans amortized cost basis 187 458
Revolving loans converted to term loans 0 0
Total 5,822 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 1,416 1,689
2023 2,389 2,853
2022 5,133 6,225
2021   6,926
Prior 31,596 17,469
Revolving loans amortized cost basis 5,884 5,324
Revolving loans converted to term loans 0 0
Total 46,473 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 (102) (48)
2023 (250) (150)
2022 (600) (229)
2021   (1,625)
Prior (3,978) (2,459)
Revolving loans amortized cost basis (573) (913)
Revolving loans converted to term loans 0 0
Total (5,576) (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 12 27
2022 0 75
2021   32
Prior 653 2,111
Revolving loans amortized cost basis 28 64
Revolving loans converted to term loans 0 0
Total 699 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 (101) (48)
2023 (238) (123)
2022 (600) (154)
2021   (1,593)
Prior (3,325) (348)
Revolving loans amortized cost basis (545) (849)
Revolving loans converted to term loans 0 0
Total (4,877) (3,115)
Residential Real Estate [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 498,665  
2025 798,617 746,665
2024 389,020 428,121
2023 660,873 785,205
2022 1,485,053 1,608,513
2021   830,732
Prior 1,820,458 1,164,513
Revolving loans amortized cost basis 527,179 534,353
Revolving loans converted to term loans 145 160
Total 6,180,010 6,098,262
Residential Real Estate [Member] | Pass [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 498,655  
2025 798,617 746,665
2024 388,548 427,238
2023 659,384 784,994
2022 1,484,851 1,608,513
2021   822,932
Prior 1,799,484 1,148,481
Revolving loans amortized cost basis 526,415 533,509
Revolving loans converted to term loans 145 160
Total 6,156,099 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 162 476
2023 653 104
2022 0 0
2021   0
Prior 1,675 4,048
Revolving loans amortized cost basis 592 637
Revolving loans converted to term loans 0 0
Total 3,092 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 310 407
2023 836 107
2022 202 0
2021   7,800
Prior 19,299 11,984
Revolving loans amortized cost basis 172 207
Revolving loans converted to term loans 0 0
Total 20,819 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 0 (205)
2022 0 (189)
2021   (6)
Prior (275) (532)
Revolving loans amortized cost basis 0 0
Revolving loans converted to term loans 0 0
Total (275) (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 59 701
Revolving loans amortized cost basis 11 1
Revolving loans converted to term loans 0 0
Total 86 704
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 0 (205)
2022 16 (189)
2021   (4)
Prior (216) 169
Revolving loans amortized cost basis 11 1
Revolving loans converted to term loans 0 0
Total (189) (295)
Construction & Land Development [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 406,527  
2025 937,774 1,031,756
2024 778,355 995,673
2023 545,276 728,729
2022 281,164 401,845
2021   69,668
Prior 125,063 37,481
Revolving loans amortized cost basis 261,384 305,750
Revolving loans converted to term loans 0 0
Total 3,335,543 3,570,902
Construction & Land Development [Member] | Pass [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 406,527  
2025 936,375 1,031,215
2024 771,514 992,846
2023 516,967 693,752
2022 268,954 401,811
2021   65,460
Prior 69,742 27,716
Revolving loans amortized cost basis 261,284 305,750
Revolving loans converted to term loans 0 0
Total 3,231,363 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 6,536 2,827
2023 23,837 30,509
2022 11,911 0
2021   4,208
Prior 47,841 8,281
Revolving loans amortized cost basis 0 0
Revolving loans converted to term loans 0 0
Total 90,125 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 4,472 4,468
2022 299 34
2021   0
Prior 7,480 1,484
Revolving loans amortized cost basis 100 0
Revolving loans converted to term loans 0 0
Total 14,055 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 9,363 9,686
Revolving loans converted to term loans 0 0
Total 9,363 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 9,291 9,603
Revolving loans converted to term loans 0 0
Total 9,291 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 27 28
Revolving loans converted to term loans 0 0
Total 27 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 45 55
Revolving loans converted to term loans 0 0
Total 45 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 (115) (320)
Revolving loans converted to term loans 0 0
Total (115) (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 20 55
Revolving loans converted to term loans 0 0
Total 20 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 (95) (265)
Revolving loans converted to term loans 0 0
Total (95) (265)
Other Consumer [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 201,586  
2025 286,000 346,960
2024 71,951 91,126
2023 59,838 80,262
2022 115,253 164,578
2021   62,245
Prior 45,228 20,201
Revolving loans amortized cost basis 1,952 2,124
Revolving loans converted to term loans 0 0
Total 781,808 767,496
Other Consumer [Member] | Pass [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 201,429  
2025 284,851 346,057
2024 71,522 90,623
2023 59,114 79,353
2022 110,234 157,220
2021   57,987
Prior 42,465 18,929
Revolving loans amortized cost basis 1,941 2,104
Revolving loans converted to term loans 0 0
Total 771,556 752,273
Other Consumer [Member] | Special Mention [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 157  
2025 929 682
2024 423 446
2023 703 821
2022 4,678 6,741
2021   3,794
Prior 2,503 1,171
Revolving loans amortized cost basis 6 13
Revolving loans converted to term loans 0 0
Total 9,399 13,668
Other Consumer [Member] | Substandard [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 220 221
2024 6 57
2023 21 88
2022 341 617
2021   464
Prior 260 101
Revolving loans amortized cost basis 5 7
Revolving loans converted to term loans 0 0
Total 853 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 0  
2025 (200) (15)
2024 (17) (185)
2023 (136) (507)
2022 (1,013) (4,547)
2021   (1,698)
Prior (693) (783)
Revolving loans amortized cost basis 0 0
Revolving loans converted to term loans 0 0
Total (2,059) (7,735)
Other Consumer [Member] | Current-period recoveries [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 5 0
2024 7 7
2023 13 78
2022 314 642
2021   273
Prior 385 429
Revolving loans amortized cost basis 0 0
Revolving loans converted to term loans 0 0
Total 724 1,429
Other Consumer [Member] | Current-period net (charge-offs) recoveries [Member]    
Disclosure Details Of Loans And Leases By Risk Category [Line Items]    
2026 0  
2025 (195) (15)
2024 (10) (178)
2023 (123) (429)
2022 (699) (3,905)
2021   (1,425)
Prior (308) (354)
Revolving loans amortized cost basis 0 0
Revolving loans converted to term loans 0 0
Total $ (1,335) $ (6,306)