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	May 02, 2020	Apr. 17, 2020	Feb. 01, 2020	May 04, 2019
Convertible Senior Notes [Abstract]
Par value	$ 575,000	$ 575,000		$ 0
Debt discount	(176,900)			0
Carrying amount	398,121		$ 0	0
Equity component	$ 160,700			$ 0