Convertible Senior Notes - Summary of the Gross Carrying Amount, Unamortized Debt Discount Including Debt Issuance Costs, and Net Carrying Value of the Liability Component (Details) - USD ($) $ in Thousands	Aug. 01, 2020	Apr. 17, 2020	Feb. 01, 2020	Aug. 03, 2019
Convertible Senior Notes [Abstract]
Par value	$ 575,000	$ 575,000
Debt discount	(170,400)
Convertible senior notes	404,573		$ 0	$ 0
Equity component	$ 160,700