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Loans and Allowance for Credit Losses - Summary of Impaired Financing Receivables (Detail) $ in Thousands | Dec. 31, 2022 USD ($)
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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

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