Fair Value Measurement - Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Assets
Notes receivable and residual certificates	$ 5,000
Loan servicing assets	34,650	$ 36,467
Liabilities
Loan servicing liabilities	3,142	3,968
Trailing fee liabilities	4,400	4,900
Fair Value, Inputs, Level 2
Assets
Interest rate cap	4,437	0
Fair Value, Inputs, Level 3
Assets
Loans	982,229	1,010,421
Notes receivable and residual certificates	5,009	6,181
Loan servicing assets	34,650	36,467
Total assets	1,026,325	1,053,069
Liabilities
Loan servicing liabilities	3,142	3,968
Trailing fee liabilities	4,449	4,852
Total liabilities	$ 7,591	$ 8,820