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Loans Held for Investment and Allowance for Credit Losses on Loans - Summary of Rental Income and Operating Expenses (Details) - Commercial Real Estate [Member] - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |
Rental income | $ 3,043 | $ 2,911 | $ 9,069 | $ 8,379
Operating expense | $ 2,601 | $ 2,690 | $ 7,524 | $ 8,038

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