Convertible Senior Notes, Warrants, and Hedges (Tables)

9 Months Ended

Dec. 31, 2017

As of the debt issuance date, the Convertible Notes, net of issuance costs, consist of the following (in thousands):



	November 3, 2015
Liability component
Principal	$	274,435
Less: Issuance cost	(7,568		)
Net carrying amount	266,867
Equity component *
Allocated amount	99,316
Less: Issuance cost	(2,738		)
Net carrying amount	96,578
Convertible Notes, net	$	363,445

* Recorded in the consolidated balance sheet within additional paid-in capital.

The following table includes total interest expense recognized related to the Convertible Notes during the three and nine months ended December 31, 2017 and January 1, 2017 (in thousands):



	Three Months Ended				Nine Months Ended
	December 31, 2017		January 1, 2017		December 31, 2017		January 1, 2017
Contractual interest expense	$	827	$	836	$	2,480	$	2,480
Amortization of debt discount	3,254		3,080		9,631		9,118
Amortization of debt issuance costs	270		270		811		810
	$	4,351	$	4,186	$	12,922	$	12,408

The net liability component of Convertible Notes is comprised of the following as of December 31, 2017 (in thousands):



Net carrying amount as of April 2, 2017	$	285,541
Amortization of debt issuance costs during the period	811
Amortization of debt discount during the period	9,631
Net carrying amount as of December 31, 2017	$	295,983