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PROPERTY AND EQUIPMENT, NET (Schedule of Depreciation Expense) (Details) - CNY (¥) ¥ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Depreciation	¥ 72,757	¥ 54,981	¥ 43,478
Cost of revenues [Member]
Property, Plant and Equipment [Line Items]
Depreciation	61,967	48,553	38,088
Selling and marketing expenses [Member]
Property, Plant and Equipment [Line Items]
Depreciation	3,226	2,694	2,253
General and administrative expenses [Member]
Property, Plant and Equipment [Line Items]
Depreciation	6,455	3,031	2,649
Research and development expenses [Member]
Property, Plant and Equipment [Line Items]
Depreciation	¥ 1,109	¥ 703	¥ 488

X

- Definition

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

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X

- 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.

+ References

No definition available.

+ Details

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