Debt (Tables)

9 Months Ended

Sep. 30, 2020

Debt Disclosure [Abstract]

Schedule of Net Carrying Amount of Liability and Equity Components of Notes

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

	September 30,			December 31,
	2020			2019
Liability component:
Principal	$	690,000		$	690,000
Unamortized debt discount		(89,500	)		(106,224	)
Unamortized transaction costs		(11,223	)		(13,320	)
Net carrying amount	$	589,277		$	570,456
Equity component, net of transaction costs	$	114,938		$	114,938

Schedule of Interest Expense Recognized Related to Notes

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Contractual interest expense	$	431	$	431	$	1,294	$	504
Amortization of debt discount		5,631		5,408		16,724		6,304
Amortization of transaction costs		706		678		2,097		790
Total	$	6,768	$	6,517	$	20,115	$	7,598