Balance Sheet Components - Other Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Other Assets [Abstract]
Servicing fees and other receivables	$ 42,943	$ 46,652
Loan servicing assets (at fair value)	34,650	36,467
Prepaid expenses	22,032	16,740
Deposits	9,839	10,002
Notes receivable and residual certificates (at fair value)	5,009	6,181
Other assets	19,926	22,678
Total other assets	$ 134,399	$ 138,720