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Restricted Net Assets (Narrative) (Details) - Company's subsidiaries, VIEs and subsidiaries of VIEs incorporated in PRC [Member] ¥ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2016 CNY (¥)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 CNY (¥)
Schedule of Restricted Net Assets [Line Items]
Portion of after-tax profit to be allocated to general reserve fund under PRC law (as a percent)	10.00%
Required general reserve/registered capital ratio to de-force compulsory net profit allocation to general reserve (as a percent)	50.00%
Restricted net assets	¥ 551.8	$ 79.5	¥ 549.9

X

- Definition

The maximum percentage of the appropriation to the statutory surplus fund over the after-tax profits calculated in accordance with PRC GAAP.

+ References

No definition available.

+ Details

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X

- Definition

The percentage of the surplus fund over the registered capital of the respective company thus appropriation is not required.

+ References

No definition available.

+ Details

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X

- Definition

Schedule of restricted net assets [Line Items]

+ References

No definition available.

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X

- Definition

Amount of restricted net assets of consolidated and unconsolidated subsidiaries as of the end of the most recently completed fiscal year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e)(3)(ii))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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