v3.26.1
Investment in Loans (Schedule of Residential Mortgage Loans: Geographic Distribution) (Details) - Financing Receivables, Unpaid Principal Balance [Member] - Residential mortgage loans - Geographic Concentration Risk [Member]
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Percentage of Total Outstanding Unpaid Principal Balance 100.00% 100.00%
CALIFORNIA    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Percentage of Total Outstanding Unpaid Principal Balance 25.70% 25.50%
FLORIDA    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Percentage of Total Outstanding Unpaid Principal Balance 17.60% 17.10%
TEXAS    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Percentage of Total Outstanding Unpaid Principal Balance 9.90% 9.10%
UTAH    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Percentage of Total Outstanding Unpaid Principal Balance 2.90% 3.20%
ARIZONA    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Percentage of Total Outstanding Unpaid Principal Balance 3.70% 3.40%
COLORADO    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Percentage of Total Outstanding Unpaid Principal Balance 1.70% 1.80%
MASSACHUSETTS    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Percentage of Total Outstanding Unpaid Principal Balance 1.40% 1.60%
WASHINGTON    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Percentage of Total Outstanding Unpaid Principal Balance 2.70% 2.50%
NEVADA    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Percentage of Total Outstanding Unpaid Principal Balance 1.50% 1.60%
OREGON    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Percentage of Total Outstanding Unpaid Principal Balance 1.60% 1.80%
NEW YORK    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Percentage of Total Outstanding Unpaid Principal Balance 2.30% 2.40%
CONNECTICUT    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Percentage of Total Outstanding Unpaid Principal Balance 1.00% 1.10%
NORTH CAROLINA    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Percentage of Total Outstanding Unpaid Principal Balance 2.40% 2.20%
NEW JERSEY    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Percentage of Total Outstanding Unpaid Principal Balance 3.60% 3.90%
ILLINOIS    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Percentage of Total Outstanding Unpaid Principal Balance 1.90% 2.10%
Other [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Percentage of Total Outstanding Unpaid Principal Balance 8.40% 8.90%
GEORGIA    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Percentage of Total Outstanding Unpaid Principal Balance 2.40% 2.60%
TENNESSEE    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Percentage of Total Outstanding Unpaid Principal Balance 2.50% 1.60%
NEW JERSEY    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Percentage of Total Outstanding Unpaid Principal Balance 2.00% 2.80%
OHIO    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Percentage of Total Outstanding Unpaid Principal Balance 1.10% 1.10%
UNITED STATES    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Percentage of Total Outstanding Unpaid Principal Balance 99.00% 99.00%
UNITED KINGDOM    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Percentage of Total Outstanding Unpaid Principal Balance 1.00% 1.00%
VIRGINIA    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Percentage of Total Outstanding Unpaid Principal Balance 0.90% 1.00%
SOUTH CAROLINA    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Percentage of Total Outstanding Unpaid Principal Balance 1.80% 1.70%