Debt - Schedule of Convertible Notes (Details) - Convertible notes	6 Months Ended
	Jun. 30, 2020 USD ($)
Debt Instrument [Line Items]
Principal	$ 1,150,000,000
Less: Unamortized debt discount and transaction costs	242,051,000
Carrying value	907,949,000
Contractual interest expense	2,987,000
Amortization of debt discount and transaction costs	4,910,000
Interest expense	$ 7,897,000