v3.25.4
Warehouse and Other Secured Lines of Credit - Summary of Line of Credit (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Line of Credit Facility [Line Items]      
Outstanding amount   $ 1,200,000,000 $ 500,000,000
Warehouse Line of Credit      
Line of Credit Facility [Line Items]      
Outstanding amount   8,912,496,000 8,697,744,000
Current aggregate committed amount   $ 900,000,000.0  
Warehouse Line of Credit | Minimum      
Line of Credit Facility [Line Items]      
Basis spread on variable rate 1.35% 1.15%  
Warehouse Line of Credit | Maximum      
Line of Credit Facility [Line Items]      
Basis spread on variable rate 1.95% 1.75%  
Warehouse Line of Credit | Line Of Credit Due May 15, 2026      
Line of Credit Facility [Line Items]      
Maximum borrowing capacity   $ 500,000,000  
Outstanding amount   396,734,000 490,509,000
Warehouse Line of Credit | Line Of Credit Due June 26, 2026      
Line of Credit Facility [Line Items]      
Maximum borrowing capacity   500,000,000  
Outstanding amount   123,379,000 150,459,000
Warehouse Line of Credit | Line Of Credit Due August 27, 2026      
Line of Credit Facility [Line Items]      
Maximum borrowing capacity   2,000,000,000.0  
Outstanding amount   1,319,244,000 1,113,979,000
Warehouse Line of Credit | Line of Credit Due September 29, 2026      
Line of Credit Facility [Line Items]      
Maximum borrowing capacity   2,000,000,000.0  
Outstanding amount   898,190,000 1,034,474,000
Warehouse Line of Credit | Line Of Credit Due October 8, 2026      
Line of Credit Facility [Line Items]      
Maximum borrowing capacity   750,000,000  
Outstanding amount   167,375,000 347,117,000
Warehouse Line of Credit | Line Of Credit Due December 17, 2026      
Line of Credit Facility [Line Items]      
Maximum borrowing capacity   325,000,000  
Outstanding amount   288,777,000 283,583,000
Warehouse Line of Credit | Line Of Credit Due November 26, 2027      
Line of Credit Facility [Line Items]      
Maximum borrowing capacity   4,500,000,000  
Outstanding amount   2,807,107,000 2,146,009,000
Warehouse Line of Credit | Line Of Credit Due February 5, 2027      
Line of Credit Facility [Line Items]      
Maximum borrowing capacity   1,500,000,000  
Outstanding amount   827,941,000 0
Warehouse Line of Credit | Line Of Credit Due February 17, 2027      
Line of Credit Facility [Line Items]      
Maximum borrowing capacity   3,000,000,000.0  
Outstanding amount   1,353,618,000 2,123,381,000
Warehouse Line of Credit | Line Of Credit Due February 19, 2027      
Line of Credit Facility [Line Items]      
Maximum borrowing capacity   1,000,000,000.0  
Outstanding amount   709,683,000 705,330,000
Warehouse Line of Credit | Line of Credit, ASAP program      
Line of Credit Facility [Line Items]      
Maximum borrowing capacity   600,000,000  
Outstanding amount   0 23,388,000
Warehouse Line of Credit | Line of Credit, EF      
Line of Credit Facility [Line Items]      
Maximum borrowing capacity   750,000,000  
Outstanding amount   $ 20,448,000 $ 279,515,000