Financial Derivatives (Narrative) (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2025	Dec. 31, 2024
Derivative [Line Items]
Spread on written credit derivatives	0.79%
Credit Default Swap, Selling Protection [Member]
Derivative [Line Items]
Total net up-front payments received	$ 3.1	$ 0.3
Minimum
Derivative [Line Items]
Spread on written credit derivatives	1.57%
Maximum
Derivative [Line Items]
Spread on written credit derivatives	3.18%