v3.26.1
Loans and the Allowance for Credit Losses - Summary of Nonperforming Loans (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Financing Receivable, Impaired [Line Items]          
Total impaired loans, Recorded investment $ 146,058   $ 146,058   $ 91,584
Nonperforming Loans [Member]          
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance, With no specific allowance recorded 155,571   155,571   93,598
Recorded Investment, With no specific allowance recorded 109,946   109,946   73,136
Unpaid Principal Balance, With a specific allowance recorded 44,323   44,323   18,586
Recorded Investment, With a specific allowance recorded 36,112   36,112   18,448
Related Allowance, With a specific allowance recorded 17,900   17,900   13,295
Total impaired loans, Unpaid principal balance 199,894   199,894   112,184
Total impaired loans, Recorded investment 146,058   146,058   91,584
Total impaired loans, Related Allowance 17,900   17,900   13,295
Average recorded investment, With no related specific allowance 115,431 $ 66,950 101,333 $ 56,843  
Average recorded investment, With a specific allowance recorded 44,111 15,967 28,852 11,684  
Total impaired loans, Average recorded investment 159,542 82,917 130,185 68,527  
Commercial Real Estate [Member]          
Financing Receivable, Impaired [Line Items]          
Total impaired loans, Recorded investment 78,546   78,546   30,586
Residential Real Estate [Member]          
Financing Receivable, Impaired [Line Items]          
Total impaired loans, Recorded investment 36,920   36,920   34,332
Residential Real Estate [Member] | Nonperforming Loans [Member]          
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance, With no specific allowance recorded 48,535   48,535   44,292
Recorded Investment, With no specific allowance recorded 36,920   36,920   34,332
Average recorded investment, With no related specific allowance 35,868 26,059 35,356 21,547  
Consumer [Member]          
Financing Receivable, Impaired [Line Items]          
Total impaired loans, Recorded investment 310   310   1,326
Consumer [Member] | Nonperforming Loans [Member]          
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance, With no specific allowance recorded 1,334   1,334   2,875
Recorded Investment, With no specific allowance recorded 310   310   1,326
Average recorded investment, With no related specific allowance 670 2,962 889 2,004  
Home Equity [Member]          
Financing Receivable, Impaired [Line Items]          
Total impaired loans, Recorded investment 10,163   10,163   9,248
Home Equity [Member] | Nonperforming Loans [Member]          
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance, With no specific allowance recorded 13,693   13,693   12,673
Recorded Investment, With no specific allowance recorded 10,163   10,163   9,248
Average recorded investment, With no related specific allowance 9,998 8,108 9,748 7,474  
Commercial Real Estate - Land and Construction [Member] | Commercial Real Estate [Member]          
Financing Receivable, Impaired [Line Items]          
Total impaired loans, Recorded investment 28,264   28,264   832
Commercial Real Estate - Land and Construction [Member] | Commercial Real Estate [Member] | Nonperforming Loans [Member]          
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance, With no specific allowance recorded 36,308   36,308   832
Recorded Investment, With no specific allowance recorded 16,054   16,054   832
Unpaid Principal Balance, With a specific allowance recorded 20,112   20,112    
Recorded Investment, With a specific allowance recorded 12,210   12,210    
Related Allowance, With a specific allowance recorded 702   702    
Average recorded investment, With no related specific allowance 22,130 682 15,031 454  
Average recorded investment, With a specific allowance recorded 20,112   6,704    
Commercial Real Estate - Improved Property [Member] | Commercial Real Estate [Member]          
Financing Receivable, Impaired [Line Items]          
Total impaired loans, Recorded investment 50,282   50,282   29,754
Commercial Real Estate - Improved Property [Member] | Commercial Real Estate [Member] | Nonperforming Loans [Member]          
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance, With no specific allowance recorded 35,917   35,917   20,883
Recorded Investment, With no specific allowance recorded 33,345   33,345   18,265
Unpaid Principal Balance, With a specific allowance recorded 17,246   17,246   11,627
Recorded Investment, With a specific allowance recorded 16,937   16,937   11,489
Related Allowance, With a specific allowance recorded 10,233   10,233   6,377
Average recorded investment, With no related specific allowance 33,316 19,689 28,299 18,432  
Average recorded investment, With a specific allowance recorded 17,037 9,008 15,187 7,045  
Commercial and Industrial [Member]          
Financing Receivable, Impaired [Line Items]          
Total impaired loans, Recorded investment 20,119   20,119   16,092
Commercial and Industrial [Member] | Nonperforming Loans [Member]          
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance, With no specific allowance recorded 19,784   19,784   12,043
Recorded Investment, With no specific allowance recorded 13,154   13,154   9,133
Unpaid Principal Balance, With a specific allowance recorded 6,965   6,965   6,959
Recorded Investment, With a specific allowance recorded 6,965   6,965   6,959
Related Allowance, With a specific allowance recorded 6,965   6,965   $ 6,918
Average recorded investment, With no related specific allowance 13,449 9,450 12,010 6,932  
Average recorded investment, With a specific allowance recorded $ 6,962 $ 6,959 $ 6,961 $ 4,639