RELATED PARTY TRANSACTIONS (Schedule of Related Party Transactions) (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
Dec. 31, 2017 CNY (¥)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 CNY (¥)
Related Party Transaction [Line Items]
Loan to:	¥ 0	$ 0	¥ 10,485	¥ 3,173
Loan from:	650,969	100,052	0	161,945
Interest expense to related party	46,355	7,125	15,073	6,705
Management service income from:	10,695	1,644	7,988	0
Finance lease income from:	10,695	1,644	7,988	252
JWYK [Member]
Related Party Transaction [Line Items]
Loan to:
Consultation service income from:	0	0	70	113
Gopher [Member]
Related Party Transaction [Line Items]
Loan from:	0	0	0	161,945
Interest expense to related party	14,639	2,250	15,073	6,705
JYADK [Member]
Related Party Transaction [Line Items]
Loan to:	0	0	1,485	3,173
Interest income from:	221	34	370	148
Tianjin Jiatai [Member]
Related Party Transaction [Line Items]
Interest income from:	91,855	14,118	0	0
Management service income from:	6,577	1,011	7,988	0
Nai'ensi [Member]
Related Party Transaction [Line Items]
Finance lease income from:	0	0	0	252
Beijing Century Friendship [Member]
Related Party Transaction [Line Items]
Interest income from:	218,104	33,522	0	0
Guofuhuimei
Related Party Transaction [Line Items]
Interest income from:	300,000	46,109	0	0
Interest expense to related party	31,716	4,875	0	0
ProMed [Member]
Related Party Transaction [Line Items]
Loan from:	41,010	6,303	0	0
Management service income from:	4,118	633	0	0
Allcure Information [Member]
Related Party Transaction [Line Items]
Loan to:	¥ 0	$ 0	¥ 9,000	¥ 0

Amount of interest expense incurred on a debt or other obligation to related party.

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Amount of interest income earned from interest-bearing assets owed to the entity by related party.

+ References

No definition available.

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The cash outflow for a loan, supported by a promissory note, granted to related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585

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The cash inflow from a long-term borrowing made from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Proceeds from Advances from Affiliates.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585

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Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

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- 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.

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Reflects the sum of all other revenue and income realized from sales and other transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party during the period.

+ References

No definition available.

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- Definition

Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(e))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07.1(c))
-URI http://asc.fasb.org/extlink&oid=6488393&loc=d3e606610-122999

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