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Convertible Senior Notes - Long-term Debt Instruments (Details) - Senior Notes - USD ($) $ in Thousands	1 Months Ended
	Aug. 31, 2020	Apr. 30, 2019
Senior Notes due 2026
Debt Instrument [Line Items]
Principal amount	$ 1,000,000
Less initial purchasers’ discount	(15,000)
Less other issuance costs	(904)
Net proceeds	$ 984,096
Senior Notes due 2025
Debt Instrument [Line Items]
Principal amount		$ 800,000
Less initial purchasers’ discount		(18,998)
Less other issuance costs		(822)
Net proceeds		$ 780,180

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