Fair Value of Assets and Liabilities (Quantiative Info for Level 3 Inputs) (Details) (USD $) In Thousands, unless otherwise specified				6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2012 Fair Value, Inputs, Level 3 [Member]	Jun. 30, 2012 Maximum [Member]		Jun. 30, 2012 Minimum [Member]		Jun. 30, 2012 Weighted Average[ Member]	Jun. 30, 2012 Corporate Securities [Member] Fair Value, Inputs, Level 3 [Member]	Jun. 30, 2012 Future Policy Benefits [Member] Fair Value, Inputs, Level 3 [Member]
Fair Value Quantiative Information [Line Items]
Discount Rate				17.50%		3.76%		4.26%
Volatility Curve				32.00%		22.00%
Call Price				100.00%		100.00%		100.00%
Lapse Rate				15.00%		0.00%
NPR Spread				2.00%		0.40%
Utilization Rate				90.00%		60.00%
Withdrawal Rate				100.00%		90.00%
Mortality Rate				10.00%	[1]	0.00%	[1]
Fixed maturities, available for sale, at fair value	$ 4,778,391	$ 5,273,767							$ 89,172
Reinsurance Recoverables			1,761,274
Future policy benefits			$ 1,795,715							$ 1,795,715

[1] Range reflects the mortality rate for the vast majority of business with living benefits, with policyholders ranging from 35 to 90 years old. While the majority of living benefits have a minimum age requirement, certain benefits do not have an age restriction. This results in contractholders for certain benefits with mortality rates approaching 0%.