Revenue - Interest Income and Fair Value Adjustments (Details) - USD ($)		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Interest income		$ 105,580,000	$ 20,634,000	$ 26,408,000
Interest expense		(10,843,000)	(3,274,000)	(8,026,000)
Unrealized gain (loss), charge-offs, and other adjustments, net		(101,422,000)	1,894,000	(11,459,000)
Realized gain (loss) on sale of loans, net		(58,143,000)	28,060,000	(2,107,000)
Total fair value and other adjustments	[1]	(159,565,000)	29,954,000	(13,566,000)
Total interest income and fair value adjustments, net		(64,828,000)	47,314,000	4,816,000
Income from capital market program, net		$ 0	$ 28,100,000	$ (2,100,000)

[1] Includes $1,014 from related parties expense and $4,238 of related parties fair value adjustments for the year ended December 31, 2020. There were no related party balances for the years ended year ended December 31, 2021 and 2022.