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COMMITMENTS AND CONTINGENCIES - Additional Information (Details) $ in Millions	Aug. 04, 2017 USD ($)	Sep. 07, 2012 lawsuit	Jun. 30, 2017 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Purchase obligation			$ 32.9
Shareholder Class Action
Loss Contingencies [Line Items]
Number of lawsuits | lawsuit		2
Subsequent event | Shareholder Class Action
Loss Contingencies [Line Items]
Litigation settlement, amount awarded to other party	$ (6.8)

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- References

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Amount of judgment or settlement awarded to (against) the entity in respect of litigation.

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The total number of new claims filed pertaining to a loss contingency during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349

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Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier.

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