Income Taxes (Reconciliation Of Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Computed tax (benefit) expense at 21%	$ (140,850)	$ 62,854	$ 96,285
Tax-exempt interest income	(11,864)	(11,577)	(12,270)
Dividends received deduction	(1,364)	(1,311)	(1,335)
State tax (benefit) expense	(1,597)	2,134	1,678
Nondeductible expenses	279	843	983
Other, net	(2,647)	(1,573)	(1,447)
Income tax (benefit) expense	$ (158,043)	$ 51,370	$ 83,894