Convertible Senior Notes (Tables)

9 Months Ended

Sep. 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:

	September 30, 2023			December 31, 2022
	(Amounts in thousands)
0.375% Convertible Senior Notes due 2024:
Principal amount	$	287,437		$	287,470
Unamortized debt issuance costs		(1,481	)		(2,855	)
Net carrying amount	$	285,956		$	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 September 30,						Nine Months Ended September 30,
	2023			2022			2023			2022
	(Amounts in thousands)
Contractual interest expense	$	269		$	270		$	808		$	809
Amortization of debt issuance costs		459			455			1,373			1,360
Total	$	728		$	725		$	2,181		$	2,169
Effective interest rate of the liability component		1.0	%		1.0	%		1.0	%		1.0	%