Convertible Senior Notes (Tables)

12 Months Ended

Feb. 02, 2020

Debt Disclosure [Abstract]

Convertible Debt

The Notes consisted of the following (in thousands):

	At the End of Fiscal
	2019		2020
Liability:
Principal	$	575,000	$	575,000
Less: debt discount, net of amortization	(116,722)		(91,378)
Less: debt issuance costs, net of amortization	(8,450)		(6,615)
Net carrying amount of the Notes	$	449,828	$	477,007
Stockholders' equity recorded at issuance:
Allocated value of the conversion feature			$	136,333
Less: debt issuance costs			(3,068)
Additional paid-in capital			$	133,265

Interest Expense

The following table sets forth total interest expense recognized related to the Notes (in thousands):

	Fiscal Year Ended
	2019			2020
Amortization of debt discount	$	19,611		$	25,344
Amortization of debt issuance costs	1,420			1,835
Total amortization of debt discount and debt issuance costs	21,031			27,179
Contractual interest expense	584			718
Total interest expense related to the Notes	$	21,615		$	27,897
Effective interest rate of the liability component	5.6		%	5.6		%