Unaudited Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Comprehensive Income (Loss)
Net income	$ 176,940	$ 220,268	$ 433,416	$ 384,524
Unrealized appreciation (decline) in value of investments:
Unrealized holding gains (losses) arising during period	(259,562)	18,060	(250,091)	112,923
Portion of other-than-temporary impairment losses recognized in other comprehensive income, net of deferred income tax	0	(503)	(2)	(511)
Reclassification of net realized gains, net of income taxes, included in net income	(13,916)	(43,792)	(52,617)	(71,303)
Foreign currency translation adjustments, net of deferred income tax	(5,407)	(15,136)	(33,629)	(1,935)
Other comprehensive income (loss)	(278,885)	(41,371)	(336,339)	39,174
Comprehensive Income (Loss)	$ (101,945)	$ 178,897	$ 97,077	$ 423,698