Accumulated Other Comprehensive Income (Loss) - Details About AOCI Components (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016		Mar. 31, 2015
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	$ (114,842)		$ (64,750)
Tax benefit (expense)	(22,295)		(24,218)
Unrealized gains (losses) on investments
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	(117,114)	[1]	(74,781)
OTTI losses recognized in AOCI
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	2,311		9,936
Accumulated Translation Adjustment [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	0		0
Underfunded pension liability
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	0		0
Cash flow hedge
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	(39)		95
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	(114,842)		(64,750)
Tax benefit (expense)	1,533		84
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(113,309)		(64,666)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized gains (losses) on investments
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Net realized gains (losses) on investments sold	(116,988)		(78,551)
OTTI on investments	21,928		15,724
Total before tax	(117,114)		(74,781)
Tax benefit (expense)	1,577		87
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(115,537)		(74,694)
Reclassification out of Accumulated Other Comprehensive Income [Member] | OTTI losses recognized in AOCI
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Net realized gains (losses) on investments sold	2,313		9,875
OTTI on investments	(2)		61
Total before tax	2,311		9,936
Tax benefit (expense)	(44)		(3)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	2,267		9,933
Reclassification out of Accumulated Other Comprehensive Income [Member] | Cash flow hedge
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	(39)		95
Tax benefit (expense)	0		0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(39)		95
Life Funds Withheld Assets
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Net realized gains (losses) on investments sold	34,416		52,738
OTTI on investments	(2,346)		(5,209)
Change in adjustments related to future policy benefit reserves, net of tax	(22,053)		(11,954)
Life Funds Withheld Assets | Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized gains (losses) on investments
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Change in adjustments related to future policy benefit reserves, net of tax	$ (22,054)		$ (11,954)

[1] . As of December 31, 2015, the cumulative impact of the Shadow Adjustments was $274.4 million. During the three months ended March 31, 2016, net movements of $(17.0) million were recorded, resulting in a total cumulative net impact of Shadow Adjustments on future policy benefit reserves of $257.4 million as of March 31, 2016.