Loans Held-for-Investment, Net of Allowance for Credit Losses - Nonaccrual Loans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Financing Receivables, Held for Investment, Nonaccrual [Roll Forward]
Nonaccrual loan carrying value at beginning of period	$ 207,958	$ 145,370
Addition of nonaccrual loan carrying value	23,270	11
Reduction of nonaccrual loan carrying value	(23,994)	(45,854)
Nonaccrual loan carrying value at end of period	$ 207,234	$ 99,527