Debt - Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	May 02, 2021	May 03, 2020
Debt Instrument [Line Items]
Total amortization of debt discount and debt issuance costs	$ 7,403	$ 6,936
Convertible Senior Notes
Debt Instrument [Line Items]
Amortization of debt discount	6,760	6,468
Amortization of debt issuance costs	490	468
Total amortization of debt discount and debt issuance costs	7,250	6,936
Contractual interest expense	175	177
Total interest expense related to the Notes	$ 7,425	$ 7,113
Effective interest rate of the liability component	5.60%	5.60%