Fixed Maturity Securities In An Unrealized Loss Position (Non-Investment Grade Fixed Maturity Securities) (Details) - External Credit Rating, Noninvestment Grade $ in Thousands	Jun. 30, 2025 USD ($)
Debt Securities, Available-for-sale [Line Items]
Number of Securities	80
Aggregate Fair Value	$ 204,934
Gross Unrealized Loss	$ 157,596
Foreign government
Debt Securities, Available-for-sale [Line Items]
Number of Securities	50
Aggregate Fair Value	$ 144,584
Gross Unrealized Loss	$ 155,344
State and municipal
Debt Securities, Available-for-sale [Line Items]
Number of Securities	6
Aggregate Fair Value	$ 28,621
Gross Unrealized Loss	$ 1,436
Corporate
Debt Securities, Available-for-sale [Line Items]
Number of Securities	8
Aggregate Fair Value	$ 29,131
Gross Unrealized Loss	$ 622
Mortgage-backed
Debt Securities, Available-for-sale [Line Items]
Number of Securities	15
Aggregate Fair Value	$ 2,589
Gross Unrealized Loss	$ 193
Asset-backed
Debt Securities, Available-for-sale [Line Items]
Number of Securities	1
Aggregate Fair Value	$ 9
Gross Unrealized Loss	$ 1