Balance Sheet Components - Other Assets (Details) - USD ($)	Jun. 30, 2023	Dec. 31, 2022
Other Assets [Abstract]
Servicing fees and other receivables	$ 46,051,000	$ 46,652,000
Loan servicing assets (at fair value)	33,339,000	36,467,000
Prepaid expenses	17,598,000	16,740,000
Intangible assets, net	13,493,000	15,631,000
Interest rate caps	10,339,000	0
Deposits	10,235,000	10,002,000
Notes receivable and residual certificates (at fair value)	3,907,000	6,181,000
Other assets	16,957,000	22,678,000
Total other assets	$ 151,919,000	$ 154,351,000