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

6 Months Ended

Jun. 30, 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):

	June 30,
	2021
Principal amounts:
Principal	$	197,278
Unamortized debt issuance costs (1)		(5,267)
Net carrying amount	$	192,011

1) Included in the unaudited interim condensed 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

	June 30,
	2021
Interest expense	$	1,850
Amortization of debt issuance costs		306
Total		2,156
Effective interest rate		4.50%