NET INCOME PER SHARE (Tables)

12 Months Ended

Dec. 31, 2015

NET INCOME PER SHARE

Schedule of calculation of basic and diluted earnings per common share

(in thousands, except for per share amounts)	2015			2014		2013
Basic income (loss) per share
Net income (loss)	$	(75,738	)	$	131,762	$	43,313
Denominator		60,117			58,293		56,736
Basic net income (loss) per share	$	(1.26	)	$	2.26	$	0.76
Diluted net income (loss) per share
Numerator:
Net income (loss)	$	(75,738	)	$	131,762	$	43,313
Add interest expense on convertible debt, net of tax		—			4,256		—
	$	(75,738	)	$	136,018	$	43,313
Denominator:
Denominator for basic income (loss) per share		60,117			58,293		56,736
Add effect of dilutive securities:
Stock options and equivalents		—			2,463		808
Convertible debt		—			5,551		—
Denominator for diluted net income (loss) per share:		60,117			66,307		57,544
Diluted net income (loss) per share	$	(1.26	)	$	2.05	$	0.75

Schedule of antidilutive securities excluded from computation of diluted net income per share

(in thousands)	2015		2014		2013
Convertible debt		17,931		—		—
Stock options and equivalents		1,490		1,578		4,824
Total potentially dilutive shares		19,421		1,578		4,824