NET INCOME (LOSS) PER SHARE (Tables)

12 Months Ended

Dec. 31, 2016

Earnings Per Share [Abstract]

Calculation of basic and diluted net income (loss) per share

The following table sets forth the calculation of basic and diluted net income (loss) per share (in thousands except per share data):

	Year Ended December 31,
	2014		2015			2016
Numerator:
Net income (loss)	$	44,869	$	(3,465	)	$	85,071
Denominator:
Denominator for basic net income (loss) per share — weighted-average outstanding shares	30,215		31,950			32,167
Effect of dilutive securities:
Stock options and restricted stock	426		—			269
Denominator for diluted net income (loss) per share — weighted-average outstanding shares	30,641		31,950			32,436
Net income (loss) per share — basic	$	1.48	$	(0.11	)	$	2.64
Net income (loss) per share — diluted	$	1.46	$	(0.11	)	$	2.62

Schedule of anti-dilutive securities excluded from computation of earnings per share

The following table summarizes the shares underlying the performance-based restricted stock awards and service-based restricted stock units excluded from the basic and diluted calculation (in thousands):

	Year Ended December 31,
	2014	2015	2016
Performance-based restricted stock awards	23	55	59
Service-based restricted stock units	1	1	1
Total shares excluded from computation	24	56	60