Convertible Senior Notes (Tables) - 3.75% Convertible Senior Notes

12 Months Ended

Dec. 31, 2021

Debt Instrument [Line Items]

Schedule of net proceeds from the Convertible Senior Notes

	Amount
	(in thousands)
Principal amount	$	212,463
Less initial purchasers' discount		(6,374)
Less cost of related capped calls		(16,253)
Less other issuance costs		(617)
Net proceeds	$	189,219

Schedule of Convertible Senior Notes

The 3.75% Convertible Senior Notes consisted of the following (in thousands):

	December 31,
	2021
Principal amounts:
Principal	$	197,278
Unamortized debt issuance costs (1)		(4,645)
Net carrying amount	$	192,633

1) Included in the consolidated balance sheets within the 3.75% Convertible Senior Notes, net and amortized over the remaining life of the notes using the effective interest rate method.

Schedule of debt

The following table summarizes the total interest expense and effective interest rate related to the 3.75% Convertible Senior Notes (in thousands, except for effective interest rate):

	December 31,
	2021
Interest expense	$	7,446
Amortization of debt issuance costs		1,670
Total		9,116
Effective interest rate		4.50%