Income Taxes - Components of Income Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Domestic	$ 465,382	$ 448,271	$ 455,478
Foreign	28,543	74,312	31,607
Income before income tax provision	$ 493,925	$ 522,583	$ 487,085