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% |