Debt - Outstanding Borrowings (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Warehouse credit facilities	$ 156,588	$ 151,964
Warehouse Agreement Borrowings
Debt Instrument [Line Items]
Warehouse credit facilities	156,588	151,964
Warehouse Agreement Borrowings | City National Bank
Debt Instrument [Line Items]
Warehouse credit facilities	21,828	20,046
Warehouse Agreement Borrowings | Origin Bank
Debt Instrument [Line Items]
Warehouse credit facilities	22,366	30,110
Warehouse Agreement Borrowings | M&T Bank
Debt Instrument [Line Items]
Warehouse credit facilities	19,951	18,870
Warehouse Agreement Borrowings | Prosperity Bank
Debt Instrument [Line Items]
Warehouse credit facilities	36,294	29,358
Warehouse Agreement Borrowings | Republic Bank & Trust Company
Debt Instrument [Line Items]
Warehouse credit facilities	33,091	23,415
Warehouse Agreement Borrowings | Wells Fargo Bank, N.A.
Debt Instrument [Line Items]
Warehouse credit facilities	23,058	30,165
Secured Debt | Term Loan
Debt Instrument [Line Items]
Long-Term Debt	124,123
Senior Notes | 0% Convertible Senior Notes due 2025
Debt Instrument [Line Items]
Long-Term Debt	143,988	192,002
Senior Notes | 0.5% Convertible Senior Notes Due 2027
Debt Instrument [Line Items]
Long-Term Debt	$ 497,221	$ 496,735