Debt - Outstanding Borrowings (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Warehouse credit facilities	$ 208,817	$ 151,964
Warehouse Agreement Borrowings
Debt Instrument [Line Items]
Warehouse credit facilities	208,817	151,964
Warehouse Agreement Borrowings | City National Bank
Debt Instrument [Line Items]
Warehouse credit facilities	45,374	20,046
Warehouse Agreement Borrowings | Origin Bank
Debt Instrument [Line Items]
Warehouse credit facilities	48,577	30,110
Warehouse Agreement Borrowings | M&T Bank
Debt Instrument [Line Items]
Warehouse credit facilities	42,385	18,870
Warehouse Agreement Borrowings | Prosperity Bank
Debt Instrument [Line Items]
Warehouse credit facilities	72,481	29,358
Warehouse Agreement Borrowings | Republic Bank & Trust Company
Debt Instrument [Line Items]
Warehouse credit facilities		23,415
Warehouse Agreement Borrowings | Wells Fargo Bank, N.A.
Debt Instrument [Line Items]
Warehouse credit facilities		30,165
Secured Debt | Term Loan
Debt Instrument [Line Items]
Long-Term Debt	243,646	124,416
Senior Notes | 0% Convertible Senior Notes due 2025
Debt Instrument [Line Items]
Long-Term Debt	73,439	192,002
Senior Notes | 0.5% Convertible Senior Notes Due 2027
Debt Instrument [Line Items]
Long-Term Debt	$ 498,205	$ 496,735