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Loans Held for Investment and Allowance for Credit Losses on Loans - Summary of Rental Income and Operating Expenses (Details) - Real Estate Investment [Member] - Commercial Real Estate [Member] - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |
Rental income | $ 2,778 | $ 2,643 | $ 5,468 | $ 5,313
Operating expense | $ 2,967 | $ 2,299 | $ 5,348 | $ 4,738

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