Fixed Maturity Securities in an Unrealized Loss Position (Non-Investment Grade Fixed Maturity Securities) (Details) - External Credit Rating, Noninvestment Grade $ in Thousands	Dec. 31, 2024 USD ($)
Foreign government
Debt Securities, Available-for-sale [Line Items]
Number of Securities	50
Aggregate Fair Value	$ 138,388
Gross Unrealized Loss	$ 157,424
Corporate
Debt Securities, Available-for-sale [Line Items]
Number of Securities	19
Aggregate Fair Value	$ 50,525
Gross Unrealized Loss	$ 2,922
State and municipal
Debt Securities, Available-for-sale [Line Items]
Number of Securities	6
Aggregate Fair Value	$ 28,150
Gross Unrealized Loss	$ 1,921
Mortgage- Backed
Debt Securities, Available-for-sale [Line Items]
Number of Securities	17
Aggregate Fair Value	$ 3,684
Gross Unrealized Loss	$ 206
Asset-backed
Debt Securities, Available-for-sale [Line Items]
Number of Securities	1
Aggregate Fair Value	$ 9
Gross Unrealized Loss	$ 1
Debt Securities
Debt Securities, Available-for-sale [Line Items]
Number of Securities	93
Aggregate Fair Value	$ 220,756
Gross Unrealized Loss	$ 162,474