Debt - Outstanding Borrowings (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Warehouse credit facilities	$ 170,212	$ 146,629
Warehouse Agreement Borrowings
Debt Instrument [Line Items]
Warehouse credit facilities	170,212	146,629
Warehouse Agreement Borrowings | City National Bank
Debt Instrument [Line Items]
Warehouse credit facilities	37,007	36,734
Warehouse Agreement Borrowings | Origin Bank
Debt Instrument [Line Items]
Warehouse credit facilities	36,516	28,920
Warehouse Agreement Borrowings | M&T Bank
Debt Instrument [Line Items]
Warehouse credit facilities	30,807	21,969
Warehouse Agreement Borrowings | Prosperity Bank
Debt Instrument [Line Items]
Warehouse credit facilities	65,882	59,006
0% Convertible Senior Notes due 2025 | Warehouse Agreement Borrowings
Debt Instrument [Line Items]
Warehouse credit facilities	243,805
Secured Debt | Term Loan
Debt Instrument [Line Items]
Long-Term Debt	243,003	243,344
Senior Notes | 0% Convertible Senior Notes due 2025
Debt Instrument [Line Items]
Long-Term Debt	73,593	73,516
Senior Notes | 0.5% Convertible Senior Notes Due 2027
Debt Instrument [Line Items]
Long-Term Debt	$ 499,181	$ 498,691