Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss) before noncontrolling interests	$ 231,716	$ (3,526)
Other comprehensive loss:
Change in unrealized currency translation adjustments	4,050	(98,194)
Change in unrealized investment gains, net of taxes	(90,130)	(258,981)
Other comprehensive loss	(86,080)	(357,175)
Comprehensive income (loss)	145,636	(360,701)
Noncontrolling interests	(2,191)	(893)
Comprehensive income (loss) to common stockholders	$ 143,445	$ (361,594)