Debt (Tables)

12 Months Ended

Dec. 28, 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):

	December 28,		December 29,
	2019		2018
Liability component
Principal	$	400,000	$	400,000
Unamortized debt discount		(27,580)		(39,298)
Unamortized debt issuance costs		(4,163)		(5,931)
Net carrying amount	$	368,257	$	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):

	Year Ended
	December 28,		December 29,		December 30,
	2019		2018		2017
Contractual interest expense	$	5,485	$	5,500	$	4,492
Amortization of debt discount		11,717		11,202		8,816
Amortization of debt issuance costs		1,768		1,690		1,330
	$	18,970	$	18,392	$	14,638