v3.26.3
WAREHOUSE AND CORPORATE NOTES PAYABLE - Warehouse Facilities (Detail) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
May 29, 2026
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Warehouse and Corporate Notes Payable        
Percentage added to reference rate   2.57%   2.57%
Agency Warehouse Facility        
Warehouse and Corporate Notes Payable        
Committed Amount   $ 1,600,000    
Uncommitted Amount   4,450,000    
Total Facility Capacity   6,050,000    
Outstanding Balance   719,299    
National Banks | Agency Warehouse Facility        
Warehouse and Corporate Notes Payable        
Committed Amount   1,600,000    
Uncommitted Amount   2,950,000    
Total Facility Capacity   4,550,000    
Outstanding Balance   668,484    
National Banks | Agency Warehouse Facility #1 | Agency Warehouse Facility        
Warehouse and Corporate Notes Payable        
Committed Amount   325,000    
Uncommitted Amount   250,000    
Total Facility Capacity   575,000    
Outstanding Balance   $ 52,211    
Percentage added to reference rate   1.20%   1.30%
Debt instrument, Variable interest rate, Type   us-gaap:SecuredOvernightFinancingRateSofrMember   us-gaap:SecuredOvernightFinancingRateSofrMember
Maturity date   Aug. 25, 2027    
National Banks | Agency Warehouse Facility #2 | Agency Warehouse Facility        
Warehouse and Corporate Notes Payable        
Committed Amount   $ 700,000    
Uncommitted Amount   300,000    
Total Facility Capacity   1,000,000    
Outstanding Balance   $ 141,774    
Percentage added to reference rate   1.20%   1.30%
Debt instrument, Variable interest rate, Type   us-gaap:SecuredOvernightFinancingRateSofrMember   us-gaap:SecuredOvernightFinancingRateSofrMember
Maturity date   Mar. 01, 2027    
National Banks | Agency Warehouse Facility #3 | Agency Warehouse Facility        
Warehouse and Corporate Notes Payable        
Committed Amount   $ 425,000    
Uncommitted Amount   425,000    
Total Facility Capacity   850,000    
Outstanding Balance   $ 89,078    
Percentage added to reference rate   1.20%   1.30%
Debt instrument, Variable interest rate, Type   us-gaap:SecuredOvernightFinancingRateSofrMember   us-gaap:SecuredOvernightFinancingRateSofrMember
Maturity date   May 14, 2027    
National Banks | Agency Warehouse Facility #4 | Agency Warehouse Facility        
Warehouse and Corporate Notes Payable        
Committed Amount   $ 150,000    
Uncommitted Amount   225,000    
Total Facility Capacity   375,000    
Outstanding Balance   $ 49,931    
Maturity date   Jun. 22, 2027    
National Banks | Agency Warehouse Facility #4 | Agency Warehouse Facility | Minimum        
Warehouse and Corporate Notes Payable        
Percentage added to reference rate   1.30%    
National Banks | Agency Warehouse Facility #4 | Agency Warehouse Facility | Maximum        
Warehouse and Corporate Notes Payable        
Percentage added to reference rate   1.35%    
National Banks | Agency Warehouse Facility #5 | Agency Warehouse Facility        
Warehouse and Corporate Notes Payable        
Uncommitted Amount   $ 1,000,000    
Total Facility Capacity   1,000,000    
Outstanding Balance   $ 162,828    
Percentage added to reference rate   1.35%   1.45%
Debt instrument, Variable interest rate, Type   us-gaap:SecuredOvernightFinancingRateSofrMember   us-gaap:SecuredOvernightFinancingRateSofrMember
Maturity date   Sep. 09, 2027    
National Banks | Agency Warehouse Facility #6 | Agency Warehouse Facility        
Warehouse and Corporate Notes Payable        
Uncommitted Amount $ 750,000 $ 750,000    
Total Facility Capacity   750,000    
Outstanding Balance   $ 172,662    
Percentage added to reference rate 1.30%      
Debt instrument, Variable interest rate, Type us-gaap:SecuredOvernightFinancingRateSofrMember      
Maturity date May 28, 2027      
Advances made as a percentage of the loan balance 100.00%      
National Banks | Agency Warehouse Facility #6 | Agency Warehouse Facility | Minimum        
Warehouse and Corporate Notes Payable        
Percentage added to reference rate   1.30%    
National Banks | Agency Warehouse Facility #6 | Agency Warehouse Facility | Maximum        
Warehouse and Corporate Notes Payable        
Percentage added to reference rate   1.40%    
National Banks | Agency Warehouse Facility #6 Bridge Loans | Agency Warehouse Facility        
Warehouse and Corporate Notes Payable        
Total Facility Capacity $ 188,000      
National Banks | Agency Warehouse Facility #6 Bridge Loans | Agency Warehouse Facility | First 180 Days of Loan Funding        
Warehouse and Corporate Notes Payable        
Percentage added to reference rate 1.30%      
Debt instrument, Variable interest rate, Type us-gaap:SecuredOvernightFinancingRateSofrMember      
National Banks | Agency Warehouse Facility #6 Bridge Loans | Agency Warehouse Facility | After 180 Days of Loan Funding        
Warehouse and Corporate Notes Payable        
Percentage added to reference rate 1.40%      
Debt instrument, Variable interest rate, Type us-gaap:SecuredOvernightFinancingRateSofrMember      
National Banks | Interim Warehouse Facility #1 | Interim Warehouse Facility        
Warehouse and Corporate Notes Payable        
Total Facility Capacity   $ 100,000    
Outstanding Balance   $ 43,500    
Debt instrument, Variable interest rate, Type     us-gaap:SecuredOvernightFinancingRateSofrMember  
National Banks | Interim Warehouse Facility #1 | Interim Warehouse Facility | Minimum        
Warehouse and Corporate Notes Payable        
Percentage added to reference rate   1.45%    
National Banks | Interim Warehouse Facility #1 | Interim Warehouse Facility | Maximum        
Warehouse and Corporate Notes Payable        
Percentage added to reference rate   1.75%    
Fannie Mae | Fannie Mae Repurchase Agreement, Uncommitted Line and Open Maturity | Agency Warehouse Facility        
Warehouse and Corporate Notes Payable        
Uncommitted Amount   $ 1,500,000    
Total Facility Capacity   1,500,000    
Outstanding Balance   $ 50,815    
Fannie Mae and Freddie Mac | Agency Warehouse Facility #6 Bridge Loans | Agency Warehouse Facility | First 180 Days of Loan Funding        
Warehouse and Corporate Notes Payable        
Advances made as a percentage of the loan balance 95.00%      
Fannie Mae and Freddie Mac | Agency Warehouse Facility #6 Bridge Loans | Agency Warehouse Facility | After 180 Days of Loan Funding        
Warehouse and Corporate Notes Payable        
Advances made as a percentage of the loan balance 90.00%      
HUD And FHA | Agency Warehouse Facility #6 Bridge Loans | Agency Warehouse Facility | First 180 Days of Loan Funding        
Warehouse and Corporate Notes Payable        
Advances made as a percentage of the loan balance 90.00%      
HUD And FHA | Agency Warehouse Facility #6 Bridge Loans | Agency Warehouse Facility | After 180 Days of Loan Funding        
Warehouse and Corporate Notes Payable        
Advances made as a percentage of the loan balance 85.00%