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Income Taxes (Reconciliation Of Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Computed tax expense at 35%	$ 24,753	$ 24,699	$ 86,598
Tax-exempt interest income	(26,197)	(26,993)	(27,839)
Dividends received deduction	(2,303)	(1,613)	(2,027)
State tax expense	1,907	(287)	3,872
Nondeductible expenses	303	575	9,900
Other, net	(783)	(293)	(1,028)
Income tax (benefit) expense	$ (2,320)	$ (3,912)	$ 69,476

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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