Fair Value Measurement - Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Assets
Loan servicing assets	$ 37,037	$ 18,388
Liabilities
Loan servicing liabilities	4,810	8,780
Trailing fee liabilities	5,200	4,300
Fair Value, Inputs, Level 3
Assets
Loans	700,455	252,477
Notes receivable and residual certificates	3,459	8,288
Loan servicing assets	37,037	18,388
Total assets	740,951	279,153
Liabilities
Loan servicing liabilities	4,810	8,780
Trailing fee liabilities	5,201	4,315
Total liabilities	$ 10,011	$ 13,095