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NET INCOME PER SHARE - Schedule of Computation of Basic and Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Numerator:
Net income	$ 145,449	$ 133,995	$ 161,148
Notes due 2023 interest and financing costs, net	177	177	1,088
Adjusted net income	$ 145,626	$ 134,172	$ 162,236
Weighted average common shares outstanding (in shares)	134,025	125,561	116,713
Denominator:
Weighted average common shares outstanding (in shares)	134,025	125,561	116,713
Employee stock-based awards (in shares)	4,918	6,997	8,964
Weighted average common shares outstanding for diluted calculation (in shares)	142,878	141,918	131,644
Net income per share, basic (in USD per share)	$ 1.09	$ 1.07	$ 1.38
Net income per share, diluted (in USD per share)	$ 1.02	$ 0.95	$ 1.23
Convertible Senior Notes Due 2024
Denominator:
Warrants (in shares)	647	4,011	0
Convertible Senior Notes Due 2025
Denominator:
Warrants (in shares)	691	0	0
Convertible Notes | Convertible Senior Notes Due 2023
Denominator:
Notes due (in shares)	900	900	5,516
Convertible Notes | Convertible Senior Notes Due 2024
Denominator:
Notes due (in shares)	768	4,449	451
Convertible Notes | Convertible Senior Notes Due 2025
Denominator:
Notes due (in shares)	929	0	0

X

- Definition

The amount of net income (loss) from continuing operations per each share of common stock or unit outstanding during the reporting period.

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