Cash and Cash Equivalents - Summary of Cash on Hand and Cash Held at Bank (Detail) ¥ in Thousands, HKD in Thousands, $ in Thousands |
Dec. 31, 2015
CNY (¥)
|
Dec. 31, 2015
USD ($)
|
Dec. 31, 2015
HKD
|
Dec. 31, 2014
CNY (¥)
|
Dec. 31, 2014
USD ($)
|
Dec. 31, 2014
HKD
|
Dec. 31, 2013
USD ($)
|
Dec. 31, 2012
USD ($)
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|---|---|---|---|---|---|---|---|---|
| Cash and Cash Equivalents [Line Items] | ||||||||
| Cash on hand and cash held at bank | $ 361,777 | $ 404,275 | $ 93,906 | $ 81,906 | ||||
| RMB [Member] | ||||||||
| Cash and Cash Equivalents [Line Items] | ||||||||
| Cash on hand and cash held at bank | ¥ 606,845 | 93,454 | ¥ 674,001 | 110,149 | ||||
| USD [Member] | ||||||||
| Cash and Cash Equivalents [Line Items] | ||||||||
| Cash on hand and cash held at bank | 268,198 | 294,036 | ||||||
| HKD [Member] | ||||||||
| Cash and Cash Equivalents [Line Items] | ||||||||
| Cash on hand and cash held at bank | $ 125 | HKD 969 | $ 90 | HKD 697 |