Convertible Notes (Tables)

9 Months Ended

Sep. 30, 2020

Debt Disclosure [Abstract]

Schedule of Components of Net Carrying Amount of Convertible Notes

The following table sets forth the net carrying amount of the convertible notes:

	September 30, 2020			December 31, 2019
5.00% Convertible Notes	$	475,000		$	475,000
Unamortized discount		(28,133	)		(34,219	)
Unamortized transaction costs		(8,713	)		(10,571	)
Net carrying amount	$	438,154		$	430,210

Schedule of Interest Expenses

The following table sets forth total interest expense recognized related to the convertible notes:

	Three months ended September 30,				Nine months ended September 30,
	2020		2019		2020		2019
Contractual coupon interest	$	5,938	$	5,938	$	17,813	$	17,813
Amortization of discount		2,059		1,969		6,087		5,790
Amortization of transaction costs		641		614		1,857		1,826
Total	$	8,638	$	8,521	$	25,757	$	25,429