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Loans and Allowance for Credit Losses - Summary of Impaired Financing Receivables (Detail)
$ in Thousands
Dec. 31, 2022
USD ($)
Financing Receivable Impaired [Line Items]  
Impaired financing receivable, with no specific allowance recorded, unpaid principal balance $ 73,660
Impaired financing receivable, related allowance 11,606
Impaired financing receivable, with an allowance recorded, recorded investment 73,643
Commercial and Industrial [Member]  
Financing Receivable Impaired [Line Items]  
Impaired financing receivable, with no specific allowance recorded, recorded investment 1,268
Impaired financing receivable, with no specific allowance recorded, unpaid principal balance 1,289
Impaired financing receivable, related allowance 11,605
Impaired financing receivable, with an allowance recorded, recorded investment 66,386
Impaired financing receivable, with an allowance recorded, unpaid principal balance 66,386
Real Estate [Member] | Mortgage, Residential [Member]  
Financing Receivable Impaired [Line Items]  
Impaired financing receivable, with no specific allowance recorded, recorded investment 834
Impaired financing receivable, with no specific allowance recorded, unpaid principal balance 834
Real Estate [Member] | Commercial Construction [Member]  
Financing Receivable Impaired [Line Items]  
Impaired financing receivable, with no specific allowance recorded, recorded investment 521
Impaired financing receivable, with no specific allowance recorded, unpaid principal balance 521
Real Estate [Member] | Mortgage, Commercial [Member]  
Financing Receivable Impaired [Line Items]  
Impaired financing receivable, with no specific allowance recorded, recorded investment 4,508
Impaired financing receivable, with no specific allowance recorded, unpaid principal balance 4,504
Impaired financing receivable, related allowance 1
Impaired financing receivable, with an allowance recorded, recorded investment 126
Impaired financing receivable, with an allowance recorded, unpaid principal balance $ 126