Deferred Policy Acquisition Costs (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
DeferredPolicyAcquisitionCostsDisclosuresAbstract
Balance, beginning of year	$ 666,764	[1]	$ 1,357,156		$ 1,242,791
DeferredPolicyAcquisitionCostsAdditions	25,081		41,994		275,316
Amortization Impact Of Assumption And Experience Unlocking And True Ups	274,503		(113,539)		59,874
Amortization - All Other	(86,461)		(602,550)		(238,543)
DeferredPolicyAcquisitionCostAmortizationExpenseUnrealizedInvestmentGainsLosses	26,927		(62)		17,718
Balance, end of year	906,814		666,764	[1]	1,357,156
Other(1)	$ 0	[2]	$ (16,235)	[2]	$ 0	[2]

[1] “As previously reported” column represents balances reported in the Annual Report on Form 10-K for the year ended December 31, 2011, originally filed with the U.S. Securities and Exchange commission (“SEC”) on March 9, 2012. “As currently reported” column was included in the 8-K filed with the SEC on November 28, 2012.

[2] (1) Balance sheet reclassification between DAC and DSI relating to refinement in methodology for allocating DAC/DSI balances for cohorts with both DAC and DSI persistency credits. Refer to Note 7 for impact to DSI.