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Loans and ACL - Additional Information (Detail) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2023 USD ($) | Jun. 30, 2022 USD ($) | Jun. 30, 2023 USD ($) Loan | Jun. 30, 2022 USD ($) | Dec. 31, 2022 USD ($) Loan | Mar. 31, 2023 USD ($) | Jan. 01, 2023 USD ($) | Mar. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Loans and lease reserve | $ 43,067 | $ 17,242 | $ 43,067 | $ 17,242 | $ 22,939 | [1] | $ 29,974 |  | $ 12,013 | $ 12,121
Charge-offs | 9,000 |  | 10,300 |  |  |  |  |  |  |
Gross loans | 2,458,604 |  | 2,458,604 |  | $ 2,412,699 |  |  |  |  |
Interest income from nonaccrual loans | 0 |  | 89 |  |  |  |  |  |  |
Number of doubtful loans | Loan |  |  |  |  | 0 |  |  |  |  |
Loans pledged | 2,458,604 |  | 2,458,604 |  |  |  |  |  |  |
Nonperforming trouble debt restructuring |  |  |  |  | $ 1,100 |  |  |  |  |
Amortized Cost of PCD Loans |  |  | 57,100 |  |  |  |  |  |  |
Non-Credit Discount on PCD Loans |  |  | 5,000 |  |  |  |  |  |  |
Allowance for Loan and Lease Losses, Write-offs | 9,020 | 2,791 | 10,329 | 5,567 |  |  |  |  |  |
Mortgage loans with amortized cost |  |  | 645 |  | 0 |  |  |  |  |
Amortized cost of ACL related to PCD loans |  |  | 601 |  |  |  |  |  |  |
Cash payments received |  |  | 4,500 |  |  |  |  |  |  |
Nonaccrual | 83,715 |  | 83,715 |  | 10,324 |  |  |  |  |
January 1, 2023 Post-ASC 326 Adoption [Member] |  |  |  |  |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Loans and lease reserve | (4,000) |  | (4,000) |  |  |  |  | $ 26,961 |  |
Nonaccrual [Member] |  |  |  |  |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Amortized Cost Of Loans Modified Nonaccrual Status |  |  | 46,876 |  |  |  |  |  |  |
Risk Grade 8 |  |  |  |  |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Loans pledged | 5,753 |  | 5,753 |  |  |  |  |  |  |
Commercial and industrial loan amount |  |  | 5,300 |  |  |  |  |  |  |
Grade 5 Pass/Watch [Member] |  |  |  |  |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Gross loans |  |  |  |  | 143,207 |  |  |  |  |
Paycheck Protection Plan Liquidity Facility Advances [Member] | Asset Pledged as Collateral without Right [Member] | Federal Home Loan Bank Advances [Member] |  |  |  |  |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Loans pledged | 0 |  | 0 |  | 51,000 |  |  |  |  |
Collateral Pledged [Member] |  |  |  |  |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Loans and lease reserve | 8,000 |  | 8,000 |  |  |  |  |  |  |
Minimum [Member] |  |  |  |  |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Nonaccrual | 73,400 |  | $ 73,400 |  | 10,300 |  |  |  |  |
Minimum [Member] | Grade 5 Pass/Watch [Member] |  |  |  |  |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Loan To Value Ratio |  |  | 90.00% |  |  |  |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Nonaccrual | 83,700 |  | $ 83,700 |  |  |  |  |  |  |
Commercial Loan [Member] |  |  |  |  |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Attributable to specific reserve | 7,000 |  |  |  |  |  |  |  |  |
Commercial and Residential Mortgages [Member] | Asset Pledged as Collateral without Right [Member] | Federal Home Loan Bank Advances [Member] |  |  |  |  |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Loans pledged | 601,900 |  | 601,900 |  | 436,000 |  |  |  |  |
Commercial and Industrial [Member] |  |  |  |  |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Modified term extension and forbearance amortized cost | 37,300 |  | 37,250 |  |  |  |  |  |  |
Attributable to specific reserve |  |  | 14,100 |  |  |  |  |  |  |
Loans and lease reserve | 34,364 |  | 34,364 |  | 19,269 |  | $ 21,279 |  |  |
Gross loans | 545,921 |  | 545,921 |  | 590,049 |  |  |  |  |
Loans pledged | 545,921 |  | 545,921 |  |  |  |  |  |  |
Allowance for Loan and Lease Losses, Write-offs | 7,326 | $ 1,383 | 8,095 | $ 3,746 |  |  |  |  |  |
Nonaccrual | 61,848 |  | 61,848 |  | 2,314 |  |  |  |  |
Commercial and Industrial [Member] | January 1, 2023 Post-ASC 326 Adoption [Member] |  |  |  |  |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Loans and lease reserve | 4,000 |  | $ 4,000 |  |  |  |  |  |  |
Commercial and Industrial [Member] | Nonaccrual [Member] |  |  |  |  |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Number of loans | Loan |  |  | 1 |  |  |  |  |  |  |
Amortized Cost Of Loans Modified Nonaccrual Status |  |  | $ 37,250 |  |  |  |  |  |  |
Nonaccrual | 37,300 |  | 37,300 |  |  |  |  |  |  |
Paycheck Protection Program [Member] |  |  |  |  |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Gross loans | 7,234 |  | 7,234 |  | $ 11,967 |  |  |  |  |
Loans pledged | $ 7,234 |  | $ 7,234 |  |  |  |  |  |  |
[1] | Derived from audited December 31, 2022 Consolidated Financial Statements.

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