CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Comprehensive income (loss)
Net income	$ 130,391	$ 198,296	$ 255,505	$ 334,960
Other comprehensive income (loss), net of tax:
Change in foreign currency translation adjustments	21,935	42,643	(95,836)	(40)
Change in net unrealized gains and losses on investments	(757,641)	304,997	(413,717)	620,381
Change in other-than-temporary impairment losses on fixed maturity securities	0	1,248	0	1,698
Changes in pension and other postretirement plan adjustments	834	273	1,788	1,014
Total other comprehensive income (loss), net of tax	(734,872)	349,161	(507,765)	623,053
Total comprehensive income (loss)	$ (604,481)	$ 547,457	$ (252,260)	$ 958,013