v3.26.1
Warehouse and Other Secured Lines of Credit - Summary of Line of Credit (Details) - USD ($)
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Line of Credit Facility [Line Items]    
Outstanding amount $ 2,000,000,000 $ 1,200,000,000
Warehouse Line of Credit    
Line of Credit Facility [Line Items]    
Outstanding amount 9,900,303,000 $ 8,912,496,000
Current aggregate committed amount $ 900,000,000.0  
Warehouse Line of Credit | Minimum    
Line of Credit Facility [Line Items]    
Basis spread on variable rate 1.00% 1.15%
Warehouse Line of Credit | Maximum    
Line of Credit Facility [Line Items]    
Basis spread on variable rate 1.75% 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 211,718,000 $ 396,734,000
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 123,377,000 123,379,000
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 1,233,511,000 1,319,244,000
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 829,323,000 898,190,000
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 185,951,000 167,375,000
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 303,979,000 288,777,000
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 970,121,000 827,941,000
Warehouse Line of Credit | Line Of Credit Due February 9, 2027    
Line of Credit Facility [Line Items]    
Maximum borrowing capacity 1,000,000,000.0  
Outstanding amount 201,155,000 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 1,664,568,000 1,353,618,000
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 608,503,000 709,683,000
Warehouse Line of Credit | Line Of Credit Due November 26, 2027    
Line of Credit Facility [Line Items]    
Maximum borrowing capacity 3,500,000,000  
Outstanding amount 3,402,576,000 2,807,107,000
Warehouse Line of Credit | Line of Credit, ASAP program    
Line of Credit Facility [Line Items]    
Maximum borrowing capacity 600,000,000  
Outstanding amount 46,814,000 0
Warehouse Line of Credit | Line of Credit, EF    
Line of Credit Facility [Line Items]    
Maximum borrowing capacity 750,000,000  
Outstanding amount $ 118,707,000 $ 20,448,000