Loans Held for Investment and the Allowance for Credit Losses - Schedule of Paid-in-Kind Interest (Details) - USD ($)	3 Months Ended			9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2023
Loans and Leases Receivable, Related Parties [Roll Forward]
Balance	$ 1,172,000	$ 1,172,000	$ 1,714,000	$ 1,714,000
Accrued PIK interest	0	0		0
Repayments of accrued PIK interest	0	0	(542,000)
Write-off of accrued PIK interest	0	0
Balance	$ 1,172,000	$ 1,172,000	$ 1,172,000	$ 1,172,000