NET INCOME (LOSS) PER SHARE (Tables)

9 Months Ended

Sep. 30, 2019

Earnings Per Share [Abstract]

Schedule of calculation of basic and diluted earnings per common share

Basic and diluted earnings per common share are calculated as follows (in thousands, except for per share amounts): 

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019			2018
Basic net income (loss) per share
Net income (loss)	$	3,331	$	48,270	$	(24,575	)	$	61,046
Denominator	72,747		63,917		67,332			63,714
Basic net income (loss) per share	$	0.05	$	0.76	$	(0.36	)	$	0.96
Diluted net income (loss) per share
Numerator:
Net income (loss)	$	3,331	$	48,270	$	(24,575	)	$	61,046
Add: Interest expense on convertible debt, net of tax	—		5,340		—			15,815
Denominator:
Denominator for basic net income (loss) per share	72,747		63,917		67,332			63,714
Add effect of diluted securities:
Stock options and equivalents and convertible debt	—		18,773		—			18,568
Denominator for diluted net income (loss) per share	72,747		82,690		67,332			82,282
Diluted net income (loss) per share	$	0.05	$	0.65	$	(0.36	)	$	0.93

Schedule of anti-dilutive securities excluded from computation of diluted net (loss) income per share

The following table sets forth outstanding potentially dilutive common shares that are not included in the computation of diluted net income (loss) per share because to do so would be anti-dilutive (in thousands):

	Three Months Ended September 30,		Nine Months Ended September 30,
	2019	2018	2019	2018
2.50% Convertible Notes due 2021	12,313	—	16,038	—
5.00% Convertible Notes due 2024	20,262	—	6,828	—
Stock options and equivalents	6,718	2,741	6,618	3,359
Total potentially dilutive common shares	39,293	2,741	29,484	3,359