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NET INCOME (LOSS) PER SHARE (Tables)

12 Months Ended

Dec. 31, 2019

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 per share (in thousands except per share data):

	Year Ended December 31,
	2019				2018				2017
Numerator:
Net income	$	314,963			$	238,334			$	122,695
Denominator:
Denominator for basic net income per share — weighted-average outstanding shares	36,310				36,058				33,200
Effect of dilutive securities:
Stock options, restricted stock awards and restricted stock units	320				390				359
Denominator for diluted net income per share — weighted-average outstanding shares	36,630				36,448				33,559
Net income per share — basic	$	8.67			$	6.61			$	3.70
Net income per share — diluted	$	8.60			$	6.54			$	3.66

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

The following table summarizes the shares underlying the unvested performance-based restricted stock and anti-dilutive securities excluded from the basic and diluted earnings per share calculations (in thousands):

	Year Ended December 31,
	2019			2018			2017
Performance-based restricted stock awards	60			53			58
Anti-dilutive securities	42			100			126

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- References

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- Definition

Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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- Definition

Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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