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Loans and Allowance for Loan Losses - Additional Information (Detail) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2022 USD ($) Loan | Jun. 30, 2021 USD ($) | Jun. 30, 2022 USD ($) Loan | Jun. 30, 2021 USD ($) | Dec. 31, 2021 USD ($)
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Gross loans | $ 2,065,587 |  | $ 2,065,587 |  | $ 1,808,484
Proceeds from sale of loans held for sale |  |  | 368,217 | $ 679,905 |
Gain on sale of Paycheck Protection Program loans | $ 0 | $ (24,315) | 0 | $ (24,315) |
Nonperforming trouble debt restructuring |  |  | $ 1,500 |  | 688
Number of loans in the process of foreclosure | Loan | 3 |  | 3 |  |
Mortgage loans in process of foreclosure, amount | $ 449 |  | $ 449 |  |
Substandard [Member] |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Gross loans | 28,553 |  | 28,553 |  | 37,315
FHLB [Member] |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Loans pledged | 404,500 |  | 404,500 |  |
Commercial and Residential Mortgages [Member] | FHLB [Member] |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Loans pledged |  |  |  |  | 478,300
Pay Check Protection Loans [Member] | Paycheck Protection Plan Liquidity Facility Advances [Member] |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Loans pledged | 60 |  | 60 |  | 17,900
Paycheck Protection Program [Member] |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Gross loans | $ 15,654 |  | $ 15,654 |  | $ 30,742

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