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Statutory Balances and Accounting Practices (Schedule Of Statutory Net Income And Capital And Surplus) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Statutory Balances And Accounting Practices [Abstract]      
Statutory net income [1] $ 81,935 $ 117,376 $ 82,359
Statutory capital and surplus $ 1,471,547 $ 1,589,226 $ 1,441,571
RBC authorized control level 300.00% 400.00% 400.00%
Minimum RBC authorized control level 200.00% 200.00% 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.