0.5% Convertible Senior Notes and Capped Call (Tables)

6 Months Ended

Sep. 30, 2020

Debt Disclosure [Abstract]

Summary of Convertible Debt

The net carrying amount of the liability component of the Notes was as follows (in thousands):

	September 30, 2020		March 31, 2020
Principal	$	500,250	$	500,250
Unamortized debt discount	(56,769)		(66,894)
Unamortized issuance costs	(5,427)		(6,312)
Net carrying amount	$	438,054	$	427,044

Summary of Interest Expense

Interest expense related to the Notes was as follows (in thousands):

	Three Months Ended September 30,				Six Months Ended September 30,
	2020		2019		2020		2019
Amortization of debt discount	$	5,095	$	4,838	$	10,125	$	9,614
Amortization of issuance costs	449		401		885		790
Contractual interest expense	626		626		1,251		1,251
Total interest expense	$	6,170	$	5,865	$	12,261	$	11,655