Reinsurance (Reinsurance Info) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
EffectsOfReinsurance1[Abstract]
Reinsurance Recoverable, Guarantee Benefits	$ 2,996,845,000		$ 748,690,000
LifeInsuranceInforce	121,000,000		128,000,000		132,000,000
Statement [Line Items]
Policy Charges Fee Income - Life	2,666,000	[1]	2,241,000	[1]	2,423,000	[1]
Total realized investment gains (losses), net	7,368,000		(184,351,000)		(83,230,000)
Policyholders' benefits	137,135,000		29,727,000		124,316,000
Operating Expenses Other Than Amortization Of Deferred Policy Acquisition Costs	394,248,000		402,679,000		424,764,000
Policy Charges and Fee Income Annuity	803,661,000		807,001,000		794,572,000
Gross
Statement [Line Items]
Policy Charges Fee Income - Life	3,522,000	[1]	3,472,000	[1]	3,522,000	[1]
Total realized investment gains (losses), net	(1,967,588,000)		1,076,184,000		202,568,000
Policyholders' benefits	137,502,000		29,874,000		124,517,000
Operating Expenses Other Than Amortization Of Deferred Policy Acquisition Costs	398,960,000		407,365,000		429,383,000
Policy Charges and Fee Income Annuity	805,550,000		809,549,000		796,711,000
Unaffiliated Ceded
Statement [Line Items]
Policy Charges Fee Income - Life	(856,000)	[1]	(1,231,000)	[1]	(1,099,000)	[1]
Total realized investment gains (losses), net	0		0		0
Policyholders' benefits	(367,000)		(147,000)		(201,000)
Operating Expenses Other Than Amortization Of Deferred Policy Acquisition Costs	(838,000)		(776,000)		(784,000)
Policy Charges and Fee Income Annuity	(1,889,000)		(2,548,000)		(2,139,000)
Affiliated Ceded
Statement [Line Items]
Policy Charges Fee Income - Life	0	[1]	0	[1]	0	[1]
Total realized investment gains (losses), net	1,974,956,000		(1,260,535,000)		(285,798,000)
Policyholders' benefits	0		0		0
Operating Expenses Other Than Amortization Of Deferred Policy Acquisition Costs	(3,874,000)		(3,910,000)		(3,835,000)
Policy Charges and Fee Income Annuity	$ 0		$ 0		$ 0

[1] Life insurance inforce face amounts at December 31, 2014, 2013 and 2012 was $ 121 million, $ 128 million and $ 132 million, respectively.