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Reserves - Summary of Statutory Reserves (Detail) ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2017 CNY (¥) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 CNY (¥)
Disclosure of reserves within equity [Line Items] |  |  |
Beginning balance | ¥ 299,144 |  |
Ending balance | 301,026 | $ 47,560 | ¥ 299,144
Statutory General Reserve [Member] |  |  |
Disclosure of reserves within equity [Line Items] |  |  |
Beginning balance | 273,438 | 43,202 | 272,515
Transfer from retained earnings | 1,882 | 297 | 923
Ending balance | 275,320 | 43,499 | 273,438
General Surplus Reserve [Member] |  |  |
Disclosure of reserves within equity [Line Items] |  |  |
Beginning balance | 25,706 | 4,061 | 25,706
Ending balance | ¥ 25,706 | $ 4,061 | ¥ 25,706

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The increase (decrease) in equity resulting from transfers to a statutory reserve. [Refer: Statutory reserve] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2016-01-13 -Paragraph 106 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2016-03-30&anchor=para_106_d&doctype=Standard -URIDate 2016-03-31 + Details
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- Definition A component of equity representing reserves created based on legal requirements. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2016-01-13 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2016-03-30&anchor=para_55&doctype=Standard -URIDate 2016-03-31 + Details
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- Details
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- Details
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