Reinsurance (Reinsurance Info) (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	Dec. 31, 2012
EffectsOfReinsurance1[Abstract]
Reinsurance Recoverable, Guarantee Benefits	$ 1,253,474		$ 1,253,474		$ 1,732,969
Statement [Line Items]
Total realized investment gains (losses), net	(68,980)	(60,640)	(150,491)	(61,563)
Policyholders' benefits	(23,602)	78,152	22,701	110,354
Operating Expenses Other Than Amortization Of Deferred Policy Acquisition Costs	$ 97,420	$ 93,052	$ 297,864	$ 309,829