Income Taxes - Domestic and Foreign Components of Income (loss) Before Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Domestic	$ 184,956	$ 171,658	$ 123,696
Foreign	377,695	294,993	241,103
Net income before provision for income taxes and equity in losses of investee	$ 562,651	$ 466,651	$ 364,799