v3.25.2
Mortgage Loans - Financial Effects of Single-Family Loan Restructurings Involving Borrowers Experiencing Financial Difficulty (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
20- and 30-year or more, amortizing fixed-rate        
financing receivable, loan restructuring [Line Items]        
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification 0.60% 0.50% 0.60% 0.70%
Financing Receivable, Modified, Weighted Average Term Increase from Modification 147 months 168 months 154 months 169 months
Weighted average payment deferral or principal forbearance $ 26 $ 17 $ 21 $ 16
15-year or less, amortizing fixed-rate        
financing receivable, loan restructuring [Line Items]        
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification 0.00% 0.00% 0.00% 0.00%
Financing Receivable, Modified, Weighted Average Term Increase from Modification 45 months 23 months 44 months 23 months
Weighted average payment deferral or principal forbearance $ 11 $ 13 $ 10 $ 13
Adjustable-rate and other        
financing receivable, loan restructuring [Line Items]        
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification 1.00% 0.80% 0.90% 0.90%
Financing Receivable, Modified, Weighted Average Term Increase from Modification 142 months 223 months 169 months 217 months
Weighted average payment deferral or principal forbearance $ 16 $ 13 $ 13 $ 14