Debt (Tables)

6 Months Ended

Jun. 29, 2019

Summary of information about the equity and liability components of convertible debt

The carrying amount of the Notes consisted of the following (in thousands):

	June 29,		December 29,
	2019		2018
Liability component
Principal	$	400,000	$	400,000
Unamortized debt discount		(33,512)		(39,298)
Unamortized debt issuance costs		(5,058)		(5,931)
Net carrying amount	$	361,430	$	354,771
Equity component
Net carrying amount	$	57,735	$	57,735

Schedule of components of interest expense

Interest expense related to the Notes was comprised of the following (in thousands):

	Three Months Ended				Six Months Ended
	June 29,		June 30,		June 29,		June 30,
	2019		2018		2019		2018
Contractual interest expense	$	1,360	$	1,375	$	2,750	$	2,765
Amortization of debt discount		2,900		2,767		5,786		5,520
Amortization of debt issuance costs		437		418		873		834
	$	4,697	$	4,560	$	9,409	$	9,119