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Loans Receivable - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Jun. 30, 2024 | Dec. 31, 2023 | Jun. 30, 2023 | Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Allowance for credit loss | $ 312,574 | $ 285,562 | $ 312,574 | $ 285,562 | $ 295,856 | $ 288,234 | $ 285,683 | $ 289,669
Deteriorated Credit Quality | Accounting Standards Update 2016-13 | Cumulative Effect Period of Adoption Adjustment |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Allowance for credit loss | 79,600 |  | 79,600 |  |  | 130,700 |  |
Mortgage Loans |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Mortgage loans held for sale | 92,000 |  | 92,000 |  |  | $ 123,400 |  |
SBA Loans |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Loans sold during period | 1,800 | 1,000 | 5,100 | 3,200 |  |  |  |
Gain on sale of guaranteed portion of loans | $ 145 | $ 97 | $ 399 | $ 236 |  |  |  |

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