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Loans and ACL - Summary of Change in the ACL by Major Loan Segment (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Financing Receivable Impaired [Line Items]        
Balance, beginning of period $ 35,025 $ 35,961 $ 35,893 [1] $ 30,740
Charge-offs (12,610) (9,020) (15,312) (10,329)
Recoveries 2,021 1,013 3,855 1,235
Net charge-offs (10,589) (8,007) (11,457) (9,094)
Provision for credit losses - loans 3,600 10,613 3,600 9,503
Balance, end of period 28,036 38,567 28,036 38,567
Commercial and Industrial [Member]        
Financing Receivable Impaired [Line Items]        
Balance, beginning of period 27,065 27,266 27,491 27,070
Charge-offs (11,982) (7,326) (13,939) (8,125)
Recoveries 1,829 887 3,360 1,005
Net charge-offs (10,153) (6,439) (10,579) (7,120)
Provision for credit losses - loans 3,472 9,037 3,472 6,988
Balance, end of period 20,384 29,864 20,384 29,864
Consumer [Member]        
Financing Receivable Impaired [Line Items]        
Balance, beginning of period 7,960 8,695 8,402 3,670
Charge-offs (628) (1,694) (1,373) (2,204)
Recoveries 192 126 495 230
Net charge-offs (436) (1,568) (878) (1,974)
Provision for credit losses - loans 128 1,576 128 2,515
Balance, end of period $ 7,652 8,703 $ 7,652 8,703
Impact of ASC 326 Adoption [Member]        
Financing Receivable Impaired [Line Items]        
Balance, end of period   7,418   7,418
Impact of ASC 326 Adoption [Member] | Commercial and Industrial [Member]        
Financing Receivable Impaired [Line Items]        
Balance, end of period   2,926   2,926
Impact of ASC 326 Adoption [Member] | Consumer [Member]        
Financing Receivable Impaired [Line Items]        
Balance, end of period   $ 4,492   $ 4,492
[1] Derived from audited December 31, 2023 Consolidated Financial Statements.