SEGMENT AND GEOGRAPHICAL INFORMATION - Revenue by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 5,057,270	$ 1,381,109
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	4,963,335	1,313,586
International
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 93,935	$ 67,523