v3.26.1
Loans and Allowance for Credit Losses - Summary of Amortized Cost Balance of Financial Assets (Detail) - USD ($)
$ in Thousands
Jun. 30, 2026
Mar. 31, 2026
Dec. 31, 2025
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans $ 41,149,726   $ 38,779,408      
Related Allowance for Credit Losses 441,372 $ 429,233 421,162 $ 394,193 $ 373,488 $ 261,734
Collateral Dependent Assets [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 126,619   144,301      
Related Allowance for Credit Losses 17,242   23,127      
Amortized Cost of Collateral Dependent Assets with no related Allowance 83,271   76,424      
Commercial and Industrial Portfolio [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 17,939,762   16,270,520      
Related Allowance for Credit Losses 295,312 252,669 240,324 210,728 192,755 161,553
Commercial and Industrial Portfolio [Member] | Collateral Dependent Assets [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 33,917   26,633      
Related Allowance for Credit Losses 13,039   11,428      
Amortized Cost of Collateral Dependent Assets with no related Allowance 14,228   10,870      
Commercial and Industrial Portfolio [Member] | Equipment/Accounts Receivable/Inventory [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 14,634,919   13,301,203      
Commercial and Industrial Portfolio [Member] | Equipment/Accounts Receivable/Inventory [Member] | Collateral Dependent Assets [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 28,942   23,594      
Related Allowance for Credit Losses 9,214   10,741      
Amortized Cost of Collateral Dependent Assets with no related Allowance 13,077   9,274      
Commercial and Industrial Portfolio [Member] | Agriculture [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 441,438   521,803      
Commercial and Industrial Portfolio [Member] | Agriculture [Member] | Collateral Dependent Assets [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 759   2,186      
Related Allowance for Credit Losses     687      
Amortized Cost of Collateral Dependent Assets with no related Allowance 759   743      
Commercial and Industrial Portfolio [Member] | NDFIs [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 2,844,233   2,430,137      
Commercial and Industrial Portfolio [Member] | NDFIs [Member] | Collateral Dependent Assets [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 4,216   853      
Related Allowance for Credit Losses 3,825          
Amortized Cost of Collateral Dependent Assets with no related Allowance 392   853      
Specialty Lending Portfolio [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 657,710   518,237      
Specialty Lending Portfolio [Member] | Asset-based Lending [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 657,710   518,237      
Commercial Real Estate Portfolio [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 16,567,363   16,376,239      
Related Allowance for Credit Losses 111,996 146,435 151,060 153,489 149,345 77,340
Commercial Real Estate Portfolio [Member] | Collateral Dependent Assets [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 61,964   86,981      
Related Allowance for Credit Losses 4,151   11,494      
Amortized Cost of Collateral Dependent Assets with no related Allowance 39,315   36,116      
Commercial Real Estate Portfolio [Member] | Owner-occupied [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 4,977,539   4,775,057      
Commercial Real Estate Portfolio [Member] | Owner-occupied [Member] | Collateral Dependent Assets [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 19,930   10,905      
Related Allowance for Credit Losses 895   2,240      
Amortized Cost of Collateral Dependent Assets with no related Allowance 17,601   3,746      
Commercial Real Estate Portfolio [Member] | Non-owner-occupied [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 6,056,599   5,734,870      
Commercial Real Estate Portfolio [Member] | Non-owner-occupied [Member] | Collateral Dependent Assets [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 24,009   50,955      
Related Allowance for Credit Losses 3,256   9,093      
Amortized Cost of Collateral Dependent Assets with no related Allowance 3,689   8,957      
Commercial Real Estate Portfolio [Member] | Farmland [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 881,163   863,570      
Commercial Real Estate Portfolio [Member] | Farmland [Member] | Collateral Dependent Assets [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 3,274   3,389      
Amortized Cost of Collateral Dependent Assets with no related Allowance 3,274   3,389      
Commercial Real Estate Portfolio [Member] | 5+ Multi-family [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 1,724,668   1,776,655      
Commercial Real Estate Portfolio [Member] | 5+ Multi-family [Member] | Collateral Dependent Assets [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 14,568   14,324      
Amortized Cost of Collateral Dependent Assets with no related Allowance 14,568   14,324      
Commercial Real Estate Portfolio [Member] | 1-4 Family Construction [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 116,870   89,474      
Commercial Real Estate Portfolio [Member] | General Construction [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 2,810,524   3,136,613      
Commercial Real Estate Portfolio [Member] | General Construction [Member] | Collateral Dependent Assets [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 183   7,408      
Related Allowance for Credit Losses     161      
Amortized Cost of Collateral Dependent Assets with no related Allowance 183   5,700      
Consumer Real Estate Portfolio [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 4,514,217   4,436,468      
Related Allowance for Credit Losses 5,710 5,134 6,938 5,521 4,798 4,327
Consumer Real Estate Portfolio [Member] | Collateral Dependent Assets [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 30,561   29,910      
Related Allowance for Credit Losses 52   205      
Amortized Cost of Collateral Dependent Assets with no related Allowance 29,551   28,661      
Consumer Real Estate Portfolio [Member] | HELOC [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 768,158   718,173      
Consumer Real Estate Portfolio [Member] | HELOC [Member] | Collateral Dependent Assets [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 5,523   5,319      
Amortized Cost of Collateral Dependent Assets with no related Allowance 5,523   5,319      
Consumer Real Estate Portfolio [Member] | First Lien: 1-4 Family [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 3,631,307   3,590,647      
Consumer Real Estate Portfolio [Member] | First Lien: 1-4 Family [Member] | Collateral Dependent Assets [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 24,482   23,969      
Related Allowance for Credit Losses 52   205      
Amortized Cost of Collateral Dependent Assets with no related Allowance 23,472   22,720      
Consumer Real Estate Portfolio [Member] | Junior Lien: 1-4 Family [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 114,752   127,648      
Consumer Real Estate Portfolio [Member] | Junior Lien: 1-4 Family [Member] | Collateral Dependent Assets [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 556   622      
Amortized Cost of Collateral Dependent Assets with no related Allowance 556   622      
Consumer Portfolio [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 269,197   238,811      
Related Allowance for Credit Losses 1,971 1,319 1,387 1,567 1,488 966
Consumer Portfolio [Member] | Collateral Dependent Assets [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 177   777      
Amortized Cost of Collateral Dependent Assets with no related Allowance 177   777      
Consumer Portfolio [Member] | Revolving Line [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 169,502   162,697      
Consumer Portfolio [Member] | Revolving Line [Member] | Collateral Dependent Assets [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 61   633      
Amortized Cost of Collateral Dependent Assets with no related Allowance 61   633      
Consumer Portfolio [Member] | Auto [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 29,237   31,887      
Consumer Portfolio [Member] | Auto [Member] | Collateral Dependent Assets [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 39   47      
Amortized Cost of Collateral Dependent Assets with no related Allowance 39   47      
Consumer Portfolio [Member] | Other [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 70,458   44,227      
Consumer Portfolio [Member] | Other [Member] | Collateral Dependent Assets [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 77   97      
Amortized Cost of Collateral Dependent Assets with no related Allowance 77   97      
Leases and Other Portfolio [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 500,245   238,400      
Related Allowance for Credit Losses 4,297 $ 1,788 1,727 $ 700 $ 541 $ 631
Leases and Other Portfolio [Member] | Leases [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans 933   1,214      
Leases and Other Portfolio [Member] | Other [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Total Loans $ 499,312   $ 237,186