FINANCING ARRANGEMENTS (Tables)

12 Months Ended

Dec. 31, 2019

Debt Disclosure [Abstract]

Schedule of Notes

The carrying amount of the Notes consisted of the following as of December 31, 2019 and 2018 (in thousands):

	December 31,
	2019			2018
Liability component:
Principal amount	$	250,000		$	250,000
Less: debt discount	(35,131		)	(48,331		)
Net carrying amount of liability component	$	214,869		$	201,669
Net carrying amount of equity component	$	67,014		$	67,014

Schedule of Convertible Debt Interest Expense

As of December 31, 2019, the remaining term of the Notes is approximately 2 years and 3 months. During the years ended December 31, 2019, 2018 and 2017, we recognized interest costs on the Notes as follows (in thousands):

	Year Ended December 31,
	2019		2018		2017
Contractual interest (3.25% of the principal amount per annum)	$	8,128	$	8,128	$	8,128
Amortization of debt discount	13,200		11,916		10,758
Total	$	21,328	$	20,044	$	18,886