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INCOME TAXES - Valuation Allowances (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation allowance, additions	$ 4,259	$ 11,166
Valuation allowance, deductions	(37,830)	(1,151)
Valuation Allowance of Deferred Tax Assets
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation allowances, beginning balance	163,666	153,651
Valuation Allowances, ending balance	$ 130,095	$ 163,666

X

- Definition

Valuation Allowance, Deferred Tax Asset, Additions, Amount

+ References

No definition available.

+ Details

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X

- Definition

Valuation Allowance, Deferred Tax Asset, Deductions, Amount

+ References

No definition available.

+ Details

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X

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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X

- Definition

Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SX 210.12-09)
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

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