CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Comprehensive income (loss)
Net income	$ 137,955	$ 144,475	$ 273,878	$ 408,904
Other comprehensive income (loss), net of tax:
Change in foreign currency translation adjustments	27,139	36,248	(75,798)	43,463
Change in net unrealized gains and losses on investments	(112,035)	315,501	(938,216)	483,242
Change in other-than-temporary impairment losses on fixed maturity securities	2,246	364	2,896	4,952
Changes in pension and other postretirement plan adjustments	517	336	2,217	1,837
Total other comprehensive income (loss), net of tax	(82,133)	352,449	(1,008,901)	533,494
Total comprehensive income (loss)	$ 55,822	$ 496,924	$ (735,023)	$ 942,398