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NET INCOME (LOSS) PER SHARE (Details 2) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
EARNINGS PER SHARE
Total	4,290	5,512	5,610	6,320
Employee Stock Option
EARNINGS PER SHARE
Total	3,918	5,092	5,094	5,102
Restricted Stock Units (RSUs)
EARNINGS PER SHARE
Total	367	375	483	364
Conversion premium on the Notes
EARNINGS PER SHARE
Total	0	9	0	817
Employee Stock
EARNINGS PER SHARE
Total	5	36	33	37

X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-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

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+ References

No definition available.

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