Debt (Tables)

3 Months Ended

Mar. 30, 2019

Debt

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

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

	March 30, 2019			December 29, 2018
Liability component
Principal	$	400,000		$	400,000
Unamortized debt discount	(36,412		)	(39,298		)
Unamortized debt issuance costs	(5,495		)	(5,931		)
Net carrying amount	$	358,093		$	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
	March 30, 2019		March 31, 2018
Contractual interest expense	$	1,390	$	1,390
Amortization of debt discount	2,886		2,753
Amortization of debt issuance costs	435		416
	$	4,711	$	4,559