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FAIR VALUE MEASUREMENTS (Schedule of Quantitative Information about Level 3 Fair Value Measurements of Property and Equipment, Other Non-current Assets and Intangible Assets) (Details) - CNY (¥) ¥ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Measurement Input, Long-term Revenue Growth Rate [Member]
Unobservable inputs
Terminal growth rate (as a percent)	3.00%
Nonrecurring [Member] | Relief-from-royalty method [Member] | Measurement Input, Long-term Revenue Growth Rate [Member]
Unobservable inputs
Terminal growth rate (as a percent)	3.00%	3.00%
Nonrecurring [Member] | Relief-from-royalty method [Member] | Minimum [Member]
Unobservable inputs
Royalty rate (as a percent)	1.00%	1.00%
Nonrecurring [Member] | Relief-from-royalty method [Member] | Minimum [Member] | Measurement Input, Discount Rate [Member]
Unobservable inputs
Discount rate (as a percent)	14.80%	14.80%
Nonrecurring [Member] | Relief-from-royalty method [Member] | Maximum [Member]
Unobservable inputs
Royalty rate (as a percent)	6.00%	6.00%
Nonrecurring [Member] | Relief-from-royalty method [Member] | Maximum [Member] | Measurement Input, Discount Rate [Member]
Unobservable inputs
Discount rate (as a percent)	17.00%	17.00%
Nonrecurring [Member] | Level 3 [Member] | Relief-from-royalty method [Member]
FAIR VALUE MEASUREMENTS [Line Items]
Intangible assets	¥ 141,758	¥ 91,249

X

- Definition

Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

+ References

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- Definition

Percentage of assumed long-term growth in revenues, used as an input to measure fair value.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Fair value portion of assets, excluding financial assets, that lack physical substance, having a limited useful life.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19190-110258

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