DEBT (Tables)

6 Months Ended

Jun. 30, 2022

Debt Disclosure [Abstract]

Contractual obligation, fiscal year maturity schedule

Carrying value of the Notes:

(in thousands)	June 30, 2022		December 31, 2021
Principal	$	600,000	$	600,000
Unamortized issuance costs	(7,839)		(9,278)
Convertible senior notes, net	$	592,161	$	590,722

Interest expense related to the Notes:

	Three Months Ended June 30,				Six Months Ended June 30,
(in thousands)	2022		2021		2022		2021
Contractual interest expense (0.75% coupon)	$	1,125	$	1,125	$	2,250	$	2,250
Amortization of issuance costs	720		675		1,439		1,348
	$	1,845	$	1,800	$	3,689	$	3,598

The effective interest rate for the Notes:

	Six Months Ended June 30,
	2022		2021
Weighted-average effective interest rate	1.2	%	1.2	%

Future payments of principal and contractual interest:

	June 30, 2022
(in thousands)	Principal		Interest		Total
Remainder of 2022	$	—	$	2,250	$	2,250
2023	—		4,500		4,500
2024	—		4,500		4,500
2025	600,000		2,250		602,250
	$	600,000	$	13,500	$	613,500

Schedule of derivative instruments

Change in capped call transactions:

	Six Months Ended June 30,
(in thousands)	2022		2021
January 1,	$	59,964	$	83,597
Fair value adjustment	(49,505)		7,192
June 30,	$	10,459	$	90,789