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Investments (Investment Related Gains (Losses) Net) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Investment Gains And Losses [Abstract]
Other-than-temporary impairments on fixed maturity securities	$ (391)	$ (1,996)	$ (10,396)	$ (11,562)
Portion of loss recognized in accumulated other comprehensive income (before taxes)	59	(559)	(247)	(7,618)
Net other-than-temporary impairment losses on fixed maturities recognized in earnings	(332)	(2,555)	(10,643)	(19,180)
Impairment losses on equity securities	0	0	0	(3,025)
Gain on investment activity	21,560	53,173	70,085	102,078
Loss on investment activity	(30,434)	(6,668)	(48,406)	(23,090)
Other impairment losses and change in mortgage loan provision	233	(10,301)	(1,268)	(14,382)
Derivatives and other, net	(67,492)	42,404	56,381	100,973
Total investment related gains (losses), net	$ (76,465)	$ 76,053	$ 66,149	$ 143,374

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Net realized gains or losses on investments during the period related to the change in value of embedded derivatives and other realized gains and losses not otherwise categorized.

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Impairment losses on equity securities

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Other impairment losses and change in mortgage loan provision.

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Other Than Temporary Impairments On Fixed Maturity Securities Transferred To Other Comprehensive Loss

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- Definition

This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 9

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This item represents the gross loss realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.

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This element represents the amount of loss recognized for other than temporary impairments (OTTI) of investments in debt and equity securities.

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The amount of other than temporary impairment (OTTI) losses on equity securities, OTTI related to credit losses on debt securities, and OTTI losses on debt securities when the entity intends to sell the securities or it is more likely than not that the entity will be required to sell the securities before recovery of its amortized cost basis. Additionally, this item includes OTTI losses recognized during the period on investments accounted for under the cost method of accounting.

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The net realized gains or losses on investments during the period, not including gains or losses on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity.

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