Statutory Balances and Accounting Practices (Schedule Of Statutory Net Income And Capital And Surplus) (Details) $ in Thousands		12 Months Ended
		Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Statutory Balances And Accounting Practices [Abstract]
Statutory net income	[1]	$ (184,292)	$ 200,488	$ 283,928
Statutory capital and surplus		$ 1,502,424	$ 1,827,210	$ 1,768,103
RBC authorized control level		3.30	4	3.50
RBC threshold for regulatory or company action		200.00%

[1] Statutory net income reflects differences from GAAP net income, including changes in the fair value of the investment portfolio as a result of the application of the fair value option.