SHARE-BASED COMPENSATION - Grants (Details) - Restricted Stock Units (RSUs) $ in Millions	6 Months Ended
Jun. 30, 2018 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Canceled (Units) \| shares	(553,268)
Compensation expense at time of cancellation \| $	$ 1.7

Amount of capitalized and expensed compensation cost from equity-based compensation arrangements.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration