Debt - Outstanding Borrowings (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Warehouse credit facilities	$ 151,964	$ 190,509
2025 notes
Debt Instrument [Line Items]
Net Carrying Amount	192,002	512,683
2025 notes | Senior Notes
Debt Instrument [Line Items]
Net Carrying Amount	192,002	512,683
2027 notes
Debt Instrument [Line Items]
Net Carrying Amount	496,735	565,474
2027 notes | Senior Notes
Debt Instrument [Line Items]
Net Carrying Amount	496,735	565,474
Term Loan | Secured Debt
Debt Instrument [Line Items]
Net Carrying Amount	124,416
Warehouse Agreement Borrowings
Debt Instrument [Line Items]
Warehouse credit facilities	151,964	190,509
Warehouse Agreement Borrowings | City National Bank
Debt Instrument [Line Items]
Warehouse credit facilities	20,046	27,288
Warehouse Agreement Borrowings | Origin Bank
Debt Instrument [Line Items]
Warehouse credit facilities	30,110	23,739
Warehouse Agreement Borrowings | M&T Bank
Debt Instrument [Line Items]
Warehouse credit facilities	18,870	19,126
Warehouse Agreement Borrowings | Prosperity Bank
Debt Instrument [Line Items]
Warehouse credit facilities	29,358	35,856
Warehouse Agreement Borrowings | Republic Bank & Trust Company
Debt Instrument [Line Items]
Warehouse credit facilities	23,415	26,636
Warehouse Agreement Borrowings | Wells Fargo Bank, N.A.
Debt Instrument [Line Items]
Warehouse credit facilities	$ 30,165	$ 31,338