Convertible Senior Notes (Tables)

6 Months Ended

Jun. 30, 2024

Debt Instrument [Line Items]

Carrying Value of Convertible Senior Notes

The carrying value of the Company's convertible senior notes is as follows:

	June 30, 2024			December 31, 2023
	(Amounts in thousands)
1.00% Convertible Senior Notes due 2028:
Principal amount	$	600,000		$	600,000
Unamortized debt discount		(74,733	)		(81,457	)
Unamortized debt issuance costs		(7,542	)		(8,400	)
Carrying amount - Convertible Senior Notes due 2028, net	$	517,725		$	510,143
0.375% Convertible Senior Notes due 2024:
Principal amount	$	69,504		$	69,700
Unamortized debt issuance costs		(23	)		(248	)
Carrying amount - Convertible Senior Notes due 2024, net	$	69,481		$	69,452

2023 Notes

Debt Instrument [Line Items]

Schedule of convertible note interest expense

The following table sets forth total interest expense recognized related to the 2023 Notes for the three and six months ended June 30, 2024 for which there were no comparable amounts for the same periods of 2023:

	Three Months Ended June 30,			Six Months Ended June 30,
	2024			2024
	(Amounts in thousands, except percentage data)
Contractual interest expense – 2023 Notes	$	1,500		$	3,000
Amortization of debt discount – 2023 Notes		3,398			6,724
Amortization of debt issuance costs – 2023 Notes		408			815
Total	$	5,306		$	10,539
Effective interest rate of the liability component		4.39	%		4.39	%

2019 Notes

Debt Instrument [Line Items]

Schedule of convertible note interest expense

The following table sets forth total interest expense recognized related to the 2019 Notes:

	Three Months Ended June 30,						Six Months Ended June 30,
	2024			2023			2024			2023
	(Amounts in thousands, except percentage data)
Contractual interest expense – 2019 Notes	$	65		$	269		$	130		$	539
Amortization of debt issuance costs – 2019 Notes		112			457			224			914
Total	$	177		$	726		$	354		$	1,453
Effective interest rate of the liability component		1.00	%		1.00	%		1.00	%		1.00	%