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Loans and ACL - Summary of Impaired Financing Receivables (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2022
Dec. 31, 2022
Financing Receivable Impaired [Line Items]      
Impaired financing receivable, with no specific allowance recorded, recorded investment     $ 73,643
Impaired financing receivable, with no specific allowance recorded, unpaid principal balance     73,660
Impaired financing receivable, related allowance     11,606
Impaired financing receivable, average recorded investment $ 24,666 $ 23,579  
Impaired financing receivable, interest income recognized 163 287  
Commercial and Industrial [Member]      
Financing Receivable Impaired [Line Items]      
Impaired financing receivable, with no specific allowance recorded, recorded investment     1,269
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
Impaired financing receivable, with no specific allowance recorded, average recorded investment 6,203 5,754  
Impaired financing receivable, with no specific allowance recorded, interest income recognized 12 74  
Impaired financing receivable, with an allowance recorded, interest income recognized 33 33  
Impaired financing receivable, with an allowance recorded, average recorded investment 6,619 4,955  
Real Estate [Member] | Mortgage, Commercial [Member]      
Financing Receivable Impaired [Line Items]      
Impaired financing receivable, with no specific allowance recorded, recorded investment     4,507
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
Impaired financing receivable, with no specific allowance recorded, average recorded investment 6,254 9,067  
Impaired financing receivable, with no specific allowance recorded, interest income recognized 100 148  
Impaired financing receivable, with an allowance recorded, interest income recognized 2 2  
Impaired financing receivable, with an allowance recorded, average recorded investment 3,570 1,829  
Real Estate [Member] | Construction, commercial [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
Impaired financing receivable, with no specific allowance recorded, average recorded investment 521 523  
Impaired financing receivable, with no specific allowance recorded, interest income recognized 8 8  
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
Impaired financing receivable, with no specific allowance recorded, average recorded investment 1,441 1,392  
Impaired financing receivable, with no specific allowance recorded, interest income recognized 3 17  
Impaired financing receivable, with an allowance recorded, interest income recognized 5 5  
Impaired financing receivable, with an allowance recorded, average recorded investment $ 58 $ 59