Commitments and Contingencies - Schedule of outstanding commitments (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)
Long-term Purchase Commitment [Line Items]
Total Commitment	$ 37,415
Funded Commitment	10,688
Remaining Commitment	26,727
MATH
Long-term Purchase Commitment [Line Items]
Total Commitment	15,607
Funded Commitment	0
Remaining Commitment	15,607
Non-Agency and Agency-Eligible Loans
Long-term Purchase Commitment [Line Items]
Total Commitment	8,062
Funded Commitment	0
Remaining Commitment	8,062
Land Related Financing
Long-term Purchase Commitment [Line Items]
Total Commitment	13,746
Funded Commitment	10,688
Remaining Commitment	$ 3,058