Asset-Backed Securities Issued - Accrued Interest Payable (Details) - Asset-backed securities issued - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Total Accrued Interest Payable on ABS Issued	$ 27,063	$ 24,808
Legacy Sequoia
Debt Instrument [Line Items]
Total Accrued Interest Payable on ABS Issued	316	282
Sequoia
Debt Instrument [Line Items]
Total Accrued Interest Payable on ABS Issued	11,259	8,880
CAFL
Debt Instrument [Line Items]
Total Accrued Interest Payable on ABS Issued	10,816	10,918
Freddie Mac SLST
Debt Instrument [Line Items]
Total Accrued Interest Payable on ABS Issued	3,510	3,561
Freddie Mac K-Series
Debt Instrument [Line Items]
Total Accrued Interest Payable on ABS Issued	$ 1,162	$ 1,167