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Fair Value Measurements - Narrative (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Significance of current credit spreads to level 3 input considerations (as percent) 10.00%   10.00%    
Amortized cost $ 17,279,000   $ 17,279,000   $ 42,279,000
Unrealized gain (loss) recognized as change in other comprehensive income (loss) 143,000 $ (786,000) 742,000 $ (786,000)  
CMBS Tranche          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Unrealized holding gain (loss) 0 $ 0   $ 0  
Debt Securities, sold at par value     25,000,000    
Debt securities, realized loss     1,300,000    
Reclassification of unrealized gain to realized loss     68,000    
CMBS Tranche | Mortgages          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Amortized cost $ 17,300,000   $ 17,300,000   $ 42,300,000
Maximum          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
SOFR interest rate forward curve (as percent) 4.129%   4.129%    
Minimum          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
SOFR interest rate forward curve (as percent) 3.087%   3.087%