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TAXATION (Narrative) (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 CNY (¥) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 CNY (¥) | Dec. 31, 2014 CNY (¥) | Dec. 31, 2016 USD ($)
Income Tax Contingency [Line Items] |  |  |  |  |  |
Applicable tax rates |  | 25.00% | 25.00% | 25.00% | 25.00% |
Income tax profits |  |  |  |  | ¥ 1,246 |
Withholding tax |  | 10.00% | 10.00% |  |  |
Unrecognized tax positions, which would impact the effective tax rate if recognized |  | ¥ 21,300 |  | ¥ 18,874 |  | $ 3,068
Income tax liabilities, interest rate |  | 0.05% | 0.05% |  |  |
Income tax liabilities, penalty rate |  | 50.00% | 50.00% |  |  |
Uncertain tax position, impact on taxes |  | ¥ 1,467 | $ 211 | 9,041 | ¥ 2,044 |
Accrued interest and penalties |  | 26,864 |  | 25,397 |  | 3,870
Undistributed earnings, which are not subject to withholding tax under prevailing tax law |  | ¥ 63,208 |  |  |  | 9,104
Business tax |  | 5.00% | 5.00% |  |  |
Operating Loss Carryforwards |  | ¥ 238,670 |  |  |  | 34,376
Retained Earnings, Appropriated |  | 1,621,233 |  |  |  | 233,506
Accrual for Taxes Other than Income Taxes |  | 42,970 |  |  |  | 6,189
Deferred Tax Assets, Net | [1] | 0 |  | 31,516 |  | 0
Accrued Expenses And Other Liabilities [Member] |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |
Accrual For Unrecognized Tax Benefit And Related Interest And Penalties |  | 65,284 |  | ¥ 61,487 |  | 9,403
Domestic Tax Authority [Member] |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |
Operating Loss Carryforwards |  | ¥ 238,670 |  |  |  | $ 34,376
Leasing [Member] |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |
Value added tax |  | 17.00% | 17.00% |  |  |
Technical Services [Member] |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |
Business tax after value added tax |  | 6.00% | 6.00% |  |  |
United States of America [Member] |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |
Applicable tax rates |  | 35.00% | 35.00% |  |  |
[1] | As at December 31, 2015 and 2016, deferred tax assets of approximately RMB16,867 and RMB12,234 (US$1,763) have been offset against deferred tax liabilities, current portion relating to a particular tax-paying component of an enterprise and within a particular tax jurisdiction, respectively.

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