Convertible Senior Notes (Tables)

6 Months Ended

Jun. 30, 2023

Debt Disclosure [Abstract]

Carrying Value of Convertible Senior Notes

The net carrying value of the liability component of the 2019 Notes is as follows:

	June 30, 2023			December 31, 2022
	(Amounts in thousands)
0.375% Convertible Senior Notes due 2024:
Principal amount	$	287,461		$	287,470
Unamortized debt issuance costs		(1,940	)		(2,855	)
Net carrying amount	$	285,521		$	284,615

Schedule of convertiable 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,
	2023			2022			2023			2022
	(Amounts in thousands)
Contractual interest expense	$	269		$	269		$	539		$	539
Amortization of debt issuance costs		457			453			914			905
Total	$	726		$	722		$	1,453		$	1,444
Effective interest rate of the liability component		1	%		1	%		1	%		1	%