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Loans - Additional Information (Detail) | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2024 USD ($) | Jun. 30, 2023 USD ($) Loan | Jun. 30, 2024 USD ($) | Jun. 30, 2023 USD ($) Loan | Mar. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Mar. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Accrued interest on loans | $ 23,958,000 |  | $ 23,958,000 |  |  | $ 23,371,000 |  |
Pledged loans receivable, carrying value | 2,410,000,000 |  | 2,410,000,000 |  |  | 2,360,000,000 |  |
Loans receivable | 6,176,359,000 |  | 6,176,359,000 |  |  | 6,182,434,000 |  |
Loans held for sale, at the lower of cost or fair value | 10,467,000 | $ 7,293,000 | 10,467,000 | $ 7,293,000 | $ 3,999,000 | 12,013,000 | $ 3,652,000 | $ 8,043,000
Gains on sale of second draw PPP loans |  |  | 3,126,000 | 3,081,000 |  |  |  |
Proceeds from sale of second draw PPP loans | 23,490,000 | 19,943,000 | 49,076,000 | 49,643,000 |  |  |  |
Interest income on nonaccrual loans | 29,000 | $ 30,000 | 38,000 | $ 134,000 |  |  |  |
Number of loan modified | Loan |  | 0 |  | 0 |  |  |  |
Other real estate owned ("OREO") | 772,000 |  | 772,000 |  |  | 117,000 |  |
Loans Pledged to Secure Advances |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Pledged loans receivable, carrying value | 2,410,000,000 |  | 2,410,000,000 |  |  | 2,360,000,000 |  |
Payment Protection Program |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loans receivable | 100,000 |  | 100,000 |  |  | 200,000 |  |
Prepaid Expenses and Other Assets |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Other real estate owned ("OREO") | 800,000 |  | 800,000 |  |  | 100,000 |  |
Loans | Accrued Interest |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Accrued interest on loans | $ 20,000,000.0 |  | $ 20,000,000.0 |  |  | $ 19,800,000 |  |

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