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OTHER NON-CURRENT ASSETS, NET (Narrative) (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 CNY (¥) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 CNY (¥) | Dec. 31, 2016 CNY (¥)
Other non-current assets [Line Items] |  |  |  |
Payments to Acquire Other Investments | ¥ 0 | $ 0 | ¥ 798 | ¥ 0
Shenyang K12 [Member] |  |  |  |
Other non-current assets [Line Items] |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  | 10.00% |
Payments to Acquire Other Investments |  |  | ¥ 4,504 |

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- Definition Amount of cash outflow to acquire investments classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585 + Details
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