CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Comprehensive income
Net income	$ 136,664	$ 185,535
Other comprehensive income (loss), net of tax:
Change in foreign currency translation adjustments	(42,683)	(14,105)
Change in net unrealized gains and losses on investments	315,384	(119,333)
Change in other-than-temporary impairment losses on fixed maturity securities	450	451
Changes in pension and other postretirement plan adjustments	741	825
Total other comprehensive income (loss), net of tax	273,892	(132,162)
Total comprehensive income	$ 410,556	$ 53,373