CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net income	$ 46,305	$ 856,723	$ 497,886
Other comprehensive income (loss), net of tax:
Unrealized gains arising during the period	74,297	266,294	522,562
Adjustment for re-classification of realized investment gains and OTTI losses recognized in net income	(119,548)	(190,646)	307,330
Unrealized gains (losses) arising during the period, net of reclassification adjustment	(45,251)	75,648	829,892
Non-credit portion of OTTI losses	(455)	(1,284)	(1,572)
Foreign currency translation adjustment	(3,045)	16,026	803
Net change in benefit plan assets and obligations recognized in equity	92	798	1,343
Total other comprehensive income (loss), net of tax	(48,659)	91,188	830,466
Comprehensive income (loss)	$ (2,354)	$ 947,911	$ 1,328,352