Reserves For Losses, LAE And Future Policy Benefit Reserve (Narrative) (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Reserves For Losses And LAE [Line Items]
Current year incurred losses	$ 2,520,596	$ 2,450,567
Catastrophe Losses [Member]
Reserves For Losses And LAE [Line Items]
Current year incurred losses	(150,000)
Catastrophe Losses [Member] | Ukraine/Russia War [Member]
Reserves For Losses And LAE [Line Items]
Current year incurred losses	$ 24,600
Development [Member]
Reserves For Losses And LAE [Line Items]
Current year incurred losses			$ 9,000