Fair Value Measurements - Financial Instruments Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Fair Value Measurements
Mortgage loans held for sale, at fair value	$ 413,998	$ 399,241
Derivative assets, at fair value	5,290	2,539
Total Assets	419,288	401,780
Derivative liabilities, at fair value — included within other liabilities	93	86
Warrant and equity related liabilities, at fair value	7,329	1,407
Total Liabilities	7,422	1,493
Level 1
Fair Value Measurements
Mortgage loans held for sale, at fair value	0	0
Derivative assets, at fair value	0	0
Total Assets	0	0
Derivative liabilities, at fair value — included within other liabilities	0	0
Warrant and equity related liabilities, at fair value	3,615	729
Total Liabilities	3,615	729
Level 2
Fair Value Measurements
Mortgage loans held for sale, at fair value	413,998	399,241
Derivative assets, at fair value	536	1,231
Total Assets	414,534	400,472
Derivative liabilities, at fair value — included within other liabilities	0	0
Warrant and equity related liabilities, at fair value	3,714	678
Total Liabilities	3,714	678
Level 3
Fair Value Measurements
Mortgage loans held for sale, at fair value	0	0
Derivative assets, at fair value	4,754	1,308
Total Assets	4,754	1,308
Derivative liabilities, at fair value — included within other liabilities	93	86
Warrant and equity related liabilities, at fair value	0	0
Total Liabilities	$ 93	$ 86