v3.26.1
Fair Value of Financial Instruments - Carrying Values and Estimated Fair Values of Financial Instruments (Parenthetical) (Details) - USD ($)
$ in Millions
Jan. 01, 2026
Jun. 30, 2026
Mar. 31, 2026
Dec. 31, 2025
Jun. 30, 2025
Mar. 31, 2025
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]            
Percentage of coinsurance costs   10.00% 10.00%   10.00% 10.00%
Percentage of risks and rewards of term life insurance policies in force 10.00%          
Deposit asset underlying 10% coinsurance agreement       $ 131.4    
Initial Public Offering [Member]            
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]            
Percentage of coinsurance costs 10.00%          
Level 3 [Member]            
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]            
Percentage of coinsurance costs   10.00%   10.00%