Debt - Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Nov. 01, 2020	Oct. 31, 2021	Nov. 01, 2020
Debt Instrument [Line Items]
Total amortization of debt discount and debt issuance costs			$ 23,011	$ 21,525
Convertible Senior Notes
Debt Instrument [Line Items]
Amortization of debt discount	$ 7,184	$ 6,799	21,029	19,970
Amortization of debt issuance costs	520	491	1,523	1,445
Total amortization of debt discount and debt issuance costs	7,704	7,290	22,552	21,415
Contractual interest expense	181	181	537	539
Total interest expense related to the Notes	$ 7,885	$ 7,471	$ 23,089	$ 21,954
Effective interest rate of the liability component	5.60%	5.60%	5.60%	5.60%