0.5% Convertible Senior Notes and Capped Call (Tables)

12 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Summary of Convertible Debt

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

	March 31, 2019			March 31, 2018
Principal	$	500,250		$	—
Unamortized debt discount	(86,374		)	—
Unamortized issuance costs	(7,939		)	—
Net carrying amount	$	405,937		$	—

Summary of Interest Expense

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

	March 31, 2019		March 31, 2018
Amortization of debt discount	$	16,135	$	—
Amortization of issuance costs	1,269		—
Contractual interest expense	2,175		—
Total interest expense	$	19,579	$	—