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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Segment Reporting (Details) - segment	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Accounting Policies [Abstract]
Number of reportable segments	1	3

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- References

No definition available.

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- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

+ Details

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