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ORGANIZATION AND BASIS OF PRESENTATION (Narrative) (Details) ¥ in Thousands |  | 1 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 09, 2015 USD ($) shares | Dec. 20, 2017 CNY (¥) | Dec. 20, 2017 USD ($) | Apr. 30, 2017 USD ($) | Nov. 30, 2016 CNY (¥) shares | Sep. 29, 2016 CNY (¥) shares | Sep. 29, 2016 USD ($) shares | Dec. 31, 2017 CNY (¥) shares | Dec. 31, 2017 USD ($) shares | Dec. 31, 2016 CNY (¥) shares | Dec. 31, 2016 USD ($) shares | Dec. 31, 2015 CNY (¥) shares | Dec. 31, 2017 USD ($) | Sep. 26, 2016 | Jan. 27, 2016
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consideration |  |  |  |  |  |  | ¥ 41,670 | $ 6,002,000 |  |  | ¥ 100,000 | $ 14,403,000 |  |  |  |
Capital injected amount |  |  |  |  |  |  |  |  |  |  | ¥ 174,000 |  |  |  |  |
Stock Repurchased During Period, Shares | shares |  |  |  |  |  |  |  |  |  |  | 967,408 | 967,408 | 614,033 |  |  |
Interest Expense and Consultation Expense,Percentage |  |  | 15.00% | 15.00% |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Equity Method Investments |  |  |  |  |  |  |  |  | ¥ 97,799 | $ 15,031,000 | ¥ 0 |  | ¥ 30,063 |  |  |
Percentage of Ownership in Equity Interest To Be Repurchased |  |  |  |  | 75.00% |  |  |  |  |  |  |  |  |  |  |
Consideration To Be Made on Acquisition of Equity Interest | $ |  |  |  |  | $ 521,396,000 |  |  |  |  |  |  |  |  |  |  |
Annual Premium Percentage to be Paid |  |  |  |  | 15.00% |  |  |  |  |  |  |  |  |  |  |
Framework Agreement Term |  |  |  |  | 4 years |  |  |  |  |  |  |  |  |  |  |
Equity Method Investments |  |  |  |  |  |  |  |  | 732,167 |  | 210,088 |  |  | $ 112,532,000 |  |
Due to Related Parties, Noncurrent |  |  |  |  |  |  |  |  | 350,969 |  | 0 |  |  | 53,943,000 |  |
Due from Affiliate, Current | [1] |  |  |  |  |  |  |  | 0 |  | 53,141 |  |  | $ 0 |  |
Business Combination, Consideration Transferred |  |  |  |  |  |  | ¥ 41,670 | $ 6,002,000 |  |  | 100,000 | $ 14,403,000 |  |  |  |
Common Unit Value Authorized |  |  |  |  |  |  |  |  | ¥ 1,009,000 |  |  |  |  |  |  |
prepayment for investments [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investments |  |  |  |  |  |  |  |  |  |  | 181,500 |  |  |  |  |
advances from long-term investment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Due to Related Parties, Noncurrent |  |  |  |  |  |  |  |  |  |  | 528,896 |  |  |  |  |
prepayments and other curent assets [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Due from Affiliate, Current |  |  |  |  |  |  |  |  |  |  | 53,141 |  |  |  |  |
CMSHK [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Equity Method Investments | $ |  |  |  | $ 1,000 |  |  |  |  |  |  |  |  |  |  |  |
Guofu Huimei Investment Management Limited Partnership [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Partners' Capital Account, Contributions | $ |  |  |  |  |  |  |  |  |  | 262,999 |  |  |  |  |  |
Percentage Of Interest In Partnership |  |  |  |  |  |  |  |  | 26.07% |  |  |  |  | 26.07% |  |
Proceeds from Loan Originations |  |  |  |  |  |  |  |  | ¥ 17,900 | 2,751,000 |  |  |  |  |  |
ZR Group [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consideration |  |  |  |  |  |  |  |  |  |  | 7,500 |  |  |  |  |
Repayments of Debt |  |  | ¥ 97,106 | $ 14,925,000 |  |  |  |  |  |  |  |  |  |  |  |
Consideration To Be Made on Acquisition of Equity Interest |  |  |  |  |  |  |  |  |  |  | 521,396 |  |  |  |  |
Business Combination, Consideration Transferred |  |  |  |  |  |  |  |  |  |  | ¥ 7,500 |  |  |  |  |
ZR Guofu [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Redeemable Noncontrolling Interest, Equity, Common, Carrying Amount |  |  |  |  |  |  |  |  | ¥ 396,281 |  |  |  |  | $ 60,907,000 |  |
ZR Guofu [Member] | Guofu Huimei Investment Management Limited Partnership [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Partners' Capital Account, Contributions | $ |  |  |  |  |  |  |  |  |  | 746,001 |  |  |  |  |  |
Percentage Of Interest In Partnership |  |  |  |  |  |  |  |  | 73.93% |  |  |  |  | 73.93% |  |
Shanghai Rongchi Medical Management Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Unit Value Authorized |  |  |  |  |  |  |  |  | ¥ 695,305 |  |  |  |  | $ 106,866,000 |  |
Beijing Century Friendship Science and Technology Development Co., Ltd. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Voting interest acquired |  |  |  |  |  |  |  |  | 78.31% |  |  |  |  | 78.31% | 100.00% | 100.00%
Total consideration |  |  |  |  |  |  |  |  | ¥ 388,500 | 59,711,000 |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  |  |  |  |  | 78.31% |  |  |  |  | 78.31% | 100.00% | 100.00%
Business Combination, Consideration Transferred |  |  |  |  |  |  |  |  | ¥ 388,500 | $ 59,711,000 |  |  |  |  |  |
Beijing Century Friendship Science and Technology Development Co., Ltd. [Member] | Private Placement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of Stock, Number of Shares Issued in Transaction | shares |  |  |  |  |  | 1,483,000 | 926,000 | 926,000 |  |  | 6,666,666 | 6,666,666 |  |  |  |
Stock Repurchased During Period, Shares | shares |  |  |  |  |  |  |  |  | 10,000 | 10,000 |  |  |  |  |  |
Sale of Stock, Percentage of Ownership after Transaction |  |  |  |  |  |  |  |  |  |  | 85.34% | 85.34% |  |  |  |
Beijing Proton Medical Center Co Ltd [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of equity interests acquired |  |  |  |  |  |  |  |  | 55.00% |  |  |  |  | 55.00% |  |
Voting interest acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 55.00%
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 55.00%
Shanghai Meizhongjiahe ProMed Cancer Centers Co., Ltd [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Voting interest acquired |  |  |  |  |  |  |  |  | 54.80% |  |  |  |  | 54.80% |  |
Total consideration |  |  |  |  |  |  |  |  | ¥ 182,000 | $ 27,973,000 |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  |  |  |  |  | 54.80% |  |  |  |  | 54.80% |  |
Business Combination, Consideration Transferred |  |  |  |  |  |  |  |  | ¥ 182,000 | 27,973,000 |  |  |  |  |  |
Tianjin Jiatai Entity Management limited Partnership [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Voting interest acquired |  |  |  |  |  |  |  |  | 28.77% |  |  |  |  | 28.77% |  |
Total consideration |  |  |  |  |  |  |  |  | ¥ 106,500 | 16,369,000 |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  |  |  |  |  | 28.77% |  |  |  |  | 28.77% |  |
Business Combination, Consideration Transferred |  |  |  |  |  |  |  |  | ¥ 106,500 | 16,369,000 |  |  |  |  |  |
CHS [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Voting interest acquired |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |
CCM (HK) [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital injected amount | $ |  | $ 40,728,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
CCM (HK) [Member] | Gopher [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Initial public offering of ordinary shares, shares | shares |  | 61,302,441 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Initial public offering of ordinary shares | $ |  | $ 7,859,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of equity interests acquired |  | 14.29% |  |  |  |  |  |  |  |  |  |  |  |  |  |
CCM (HK) [Member] | Asendium [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Initial public offering of ordinary shares, shares | shares |  | 366,685,949 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Initial public offering of ordinary shares | $ |  | $ 47,011,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of equity interests acquired |  | 85.71% |  |  |  |  |  |  |  |  |  |  |  |  |  |
SHC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of equity interests acquired |  | 70.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
SHC [Member] | Gopher [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of equity interests acquired |  | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shanghai Huifu Technology Development Co., Ltd. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of equity interest sold |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 99.00% |
Guangzhou Concord Medical Cancer Hospital Co Ltd [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Voting interest acquired |  |  |  |  |  | 70.00% |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  |  | 70.00% |  |  |  |  |  |  |  |  |  |
Proceeds from Loan Originations |  |  |  |  |  |  |  |  | ¥ 300,000 | $ 46,109,000 |  |  |  |  |  |
PTC Houston Management [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Voting interest acquired |  |  |  |  |  | 59.51% |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  |  | 59.51% |  |  |  |  |  |  |  |  |  |
CCM Hospital Business [Member] | Cyber [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consideration |  |  |  |  |  | ¥ 7,500 |  |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred |  |  |  |  |  | 7,500 |  |  |  |  |  |  |  |  |  |
CCM Hospital Business [Member] | Cyber [Member] | Common Class B [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock, Value, Subscriptions |  |  |  |  |  | 166,299 |  |  |  |  |  |  |  |  |  |
CCM Hospital Business [Member] | Wealth in International Holdings Limited [Member] | Common Class A [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock, Value, Subscriptions |  |  |  |  |  | ¥ 521,396 |  |  |  |  |  |  |  |  |  |
[1] | Prepayments to ZR Guofu represented the prepayment made for the annual interest expense and consultation expense as of December 31, 2016 (note 1).

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