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FINANCING ARRANGEMENTS - Schedule of Convertible Debt Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Apr. 30, 2016
Debt Instrument [Line Items]
Amortization of debt discount	$ 303	$ 3,516
Senior Notes | 3.25% Convertible Senior Notes due 2022
Debt Instrument [Line Items]
Stated interest rate			3.25%
Contractual interest (3.25% of the principal amount per annum)	2,032	2,032
Amortization of debt discount	303	3,516
Total	$ 2,335	$ 5,548

X

- Definition

Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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Represents the portion of interest incurred in the period on debt arrangements that was charged against earnings, excluding amortization of debt discount (premium) and financing costs.

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