Loans Held-for-Investment and Allowance for Credit Losses - Summary of information on the allowance for credit losses (Parenthetical) (Details) - USD ($) |
3 Months Ended | ||||
|---|---|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Dec. 31, 2025 |
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| Financing Receivable, Allowance for Credit Loss [Line Items] | |||||
| Provision for loan losses | [1] | $ 2,738,000 | $ 2,991,000 | ||
| Provision for Loan, Lease, and Other Losses, Total | 2,291,000 | $ 3,528,000 | |||
| Provision for off-balance sheet credit exposures | 447,000 | ||||
| Off-balance sheet commitments | $ 1,794,686,000 | $ 537,000 | |||
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