Reinsurance (Reinsurance Info) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011		Dec. 31, 2010
effectsofreinsurance
Reinsurance Recoverable, Guarantee Benefits	$ 1,732,969,000	$ 1,748,177,000
LifeInsuranceInforce	132,000,000	141,000,000		153,000,000
Statement [Line Items]
Policy Charges Fee Income - Life	2,423,000	3,272,000		662,000
Total realized investment gains (losses), net	(83,230,000)	71,783,000		136,039,000
Policyholders' benefits	124,316,000	128,149,000		40,911,000
Operating Expenses Other Than Amortization Of Deferred Policy Acquisition Costs	424,764,000	442,062,000	[1]	449,351,000	[1]
Policy Charges and Fee Income Annuity	794,572,000	821,536,000		740,528,000
Gross
Statement [Line Items]
Policy Charges Fee Income - Life	3,522,000	3,711,000		3,895,000
Total realized investment gains (losses), net	202,568,000	(1,224,770,000)		216,875,000
Policyholders' benefits	124,517,000	128,873,000		41,908,000
Operating Expenses Other Than Amortization Of Deferred Policy Acquisition Costs	429,383,000	446,790,000		454,015,000
Policy Charges and Fee Income Annuity	796,711,000	825,000,000		715,368,000
Unaffiliated Ceded
Statement [Line Items]
Policy Charges Fee Income - Life	(1,099,000)	(439,000)		(3,233,000)
Total realized investment gains (losses), net	0	0		0
Policyholders' benefits	(201,000)	(724,000)		(997,000)
Operating Expenses Other Than Amortization Of Deferred Policy Acquisition Costs	(784,000)	(924,000)		(1,232,000)
Policy Charges and Fee Income Annuity	(2,139,000)	(3,464,000)		25,160,000
Affiliated Ceded
Statement [Line Items]
Policy Charges Fee Income - Life	0	0		0
Total realized investment gains (losses), net	(285,798,000)	1,296,553,000		(80,836,000)
Policyholders' benefits	0	0		0
Operating Expenses Other Than Amortization Of Deferred Policy Acquisition Costs	(3,835,000)	(3,804,000)		(3,432,000)
Policy Charges and Fee Income Annuity	$ 0	$ 0		$ 0

[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 SEC on March 9, 2012. “As currently reported” column was included in the 8-K filed with the SEC on November 28, 2012.