Derivative Instruments (Details 3) (USD $) In Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Changes In Estimated Fair Value Related To Embedded Derivatives
Total investment related gains (losses), net	$ 27,388	$ 22,992	$ 151,008	$ 154,177
Total benefits and expenses	2,003,571	1,733,805	4,044,157	3,640,675
Net income	132,888	127,019	293,704	249,458
Embedded Derivatives In Modified Coinsurance Or Funds Withheld Arrangements And Variable Annuity Contracts Member
Changes In Estimated Fair Value Related To Embedded Derivatives
Total investment related gains (losses), net	(15,335)	(108,422)	107,854	21,383
Net income	(3,626)	(7,172)	24,358	13,407
Embedded Derivatives In Equity Indexed Annuities Member
Changes In Estimated Fair Value Related To Embedded Derivatives
Total benefits and expenses	(32,077)	(14,950)	(73,348)	(3,222)
Net income	$ (13,192)	$ (3,952)	$ (49,842)	$ (5,184)

This item represents the net total realized and unrealized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain or loss of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain or loss which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any gains or losses realized during the period from the sale of investments accounted for under the cost method of accounting and losses recognized for other than temporary impairments of the subject investments.

+ References+ Details

The portion of consolidated profit or loss for the period, net of income taxes, which is attributable to the parent. If the entity does not present consolidated financial statements, the amount of profit or loss for the period, net of income taxes.

+ References+ Details