Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income before noncontrolling interests	$ 267,318	$ 152,366	$ 736,712	$ 220,495
Other comprehensive (loss) income:
Change in unrealized currency translation adjustments	(32,822)	40,194	(26,235)	(36,553)
Change in unrealized investment (losses) gains, net of taxes	(35,596)	38,273	(102,454)	98,016
Other comprehensive (loss) income	(68,418)	78,467	(128,689)	61,463
Comprehensive income	198,900	230,833	608,023	281,958
Noncontrolling interests	(6,021)	(685)	(8,651)	(1,973)
Comprehensive income to common stockholders	$ 192,879	$ 230,148	$ 599,372	$ 279,985