Investments (Summary Of Changes In Net Unrealized Appreciation (Depreciation) For The Company's Investments) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Change in unrealized appreciation (depreciation), pre-tax	$ 20,312	$ (467,159)
Deferred tax benefit (expense)	(1,623)us-gaap_DeferredIncomeTaxExpenseBenefit	64,245us-gaap_DeferredIncomeTaxExpenseBenefit
Deferred tax benefit (expense), other-than-temporary impairment	3,407	140
Change in unrealized appreciation (depreciation), net of deferred taxes, included in shareholders' equity	22,096	(402,774)
Fixed Maturity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Change in unrealized appreciation (depreciation), pre-tax	34,245	(449,456)
Fixed Maturity Securities, Other-Than-Temporary Impairment [Member]
Schedule of Available-for-sale Securities [Line Items]
Change in unrealized appreciation (depreciation), pre-tax	(10,078)	(1,579)
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Change in unrealized appreciation (depreciation), pre-tax	$ (3,855)	$ (16,124)

Cumulative Other Than Temporary Impairment Adjustment Deferred Tax Benefit Expense.

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- Definition

This item represents the pretax change in net unrealized holding gain (loss) on available-for-sale securities that has been included in accumulated other comprehensive income, a separate component of shareholders' equity, during the period.

+ References

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The change in unrealized holding gain (loss), net of tax, on available-for-sale securities included in a separate component of shareholders' equity during the period.

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Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

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-Glossary Deferred Tax Expense (or Benefit)

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