Income Taxes (Reconciliation Of Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Computed tax expense at 35%	$ 24,699	$ 86,598	$ 46,234
Tax-exempt interest income	(26,993)	(27,839)	(26,381)
Dividends received deduction	(1,613)	(2,027)	(2,239)
State tax expense	(287)	3,872	4,944
Nondeductible expenses	575	9,900	190
Other, net	(293)	(1,028)	(2,795)
Income tax (benefit) expense	$ (3,912)	$ 69,476	$ 19,953