CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Statement of Income and Comprehensive Income [Abstract]
Net income (loss)	$ 189,066	$ 110,287	$ 324,905	$ (264,254)
Other comprehensive income (loss), net of tax:
Unrealized gains (losses) arising during the period	(17,774)	103,923	146,639	116,705
Adjustment for re-classification of realized investment gains and OTTI losses recognized in net income	(16,594)	(43,371)	(31,788)	(79,320)
Unrealized gains (losses) arising during the period, net of reclassification adjustment	(34,368)	60,552	114,851	37,385
Non-credit portion of OTTI losses	0	0	0	(215)
Foreign currency translation adjustment	(2,867)	2,389	(2,074)	4,142
Total other comprehensive income (loss), net of tax	(37,235)	62,941	112,777	41,312
Comprehensive income (loss)	$ 151,831	$ 173,228	$ 437,682	$ (222,942)