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GOODWILL (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2018 CNY (¥) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 CNY (¥)
Changes in the carrying amount of goodwill by segment |  |  |
Balance at the beginning of the period | ¥ 73,166 |  |
Balance at the end of the period | ¥ 73,166 | $ 10,642 | ¥ 73,166
Measurement Input, Long-term Revenue Growth Rate [Member] |  |  |
Changes in the carrying amount of goodwill by segment |  |  |
Terminal growth rate (as a percent) | 3.00% | 3.00% |
Minimum [Member] | Measurement Input, Default Rate [Member] |  |  |
Changes in the carrying amount of goodwill by segment |  |  |
Discount rate (as a percent) | 14.80% | 14.80% |
Maximum [Member] | Measurement Input, Default Rate [Member] |  |  |
Changes in the carrying amount of goodwill by segment |  |  |
Discount rate (as a percent) | 17.00% | 17.00% |
Better Schools [Member] |  |  |
Changes in the carrying amount of goodwill by segment |  |  |
Balance at the beginning of the period |  |  | 33,482
Balance at the end of the period | ¥ 33,482 |  |
Better Schools [Member] | Tutoring [Member] |  |  |
Changes in the carrying amount of goodwill by segment |  |  |
Balance at the beginning of the period |  |  | 7,772
Balance at the end of the period | 7,772 |  |
Better Schools [Member] | K-12 Schools [Member] |  |  |
Changes in the carrying amount of goodwill by segment |  |  |
Balance at the beginning of the period |  |  | 25,710
Balance at the end of the period | 25,710 |  |
Better Jobs [Member] |  |  |
Changes in the carrying amount of goodwill by segment |  |  |
Balance at the beginning of the period |  |  | 73,166
Balance at the end of the period | 73,166 |  |
Better Jobs [Member] | Career Enhancement [Member] |  |  |
Changes in the carrying amount of goodwill by segment |  |  |
Balance at the beginning of the period |  |  | ¥ 39,684
Balance at the end of the period | ¥ 39,684 |  |

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- 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 No definition available. + Details
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- Definition Percentage of assumed long-term growth in revenues, used as an input to measure fair value. + References No definition available. + Details
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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