Investments and Derivative Instruments (Sales of Available-for-Sale Securities) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Fixed maturities, AFS [Member]
Available for-sale-securities, Gross Realized Gain (Loss)
Sale proceeds	$ 19,190,000	$ 23,555	$ 19,861
Gross gains	1,867,000	521	354
Gross losses	(421,000)	(270)	(205)
Equity Securities, AFS [Member]
Available for-sale-securities, Gross Realized Gain (Loss)
Sale proceeds	81,000	133	147
Gross gains	254,000	15	50
Gross losses	$ (263,000)	$ (5)	$ 0

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

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 9

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563

+ Details

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- Definition

The total amount of proceeds received for the sale of securities, categorized neither as held-to-maturity nor trading securities, during the reporting period.

+ References

+ Details

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- Definition

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

+ References

+ Details

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