Investments (Roll Forward of Cumulative Credit Losses Recorded in Earnings) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Balance beginning of period	$ 57	$ 1,267	$ 1,267	$ 57
Additional credit losses recognized during the period, related to securities for which:
No impairment has been previously recognized	1,263	0	1,263	740
Impairment has been previously recognized	0	0	0	470
Reductions due to:
Securities sold during the period	(1)	0	(1,211)	0
Balance ending of period	$ 1,319	$ 1,267	$ 1,319	$ 1,267