Taxation - Income before Income/(Loss) Tax Expenses (Detail) ¥ in Thousands, $ in Thousands |
12 Months Ended | |||
|---|---|---|---|---|
|
Dec. 31, 2017
CNY (¥)
|
Dec. 31, 2017
USD ($)
|
Dec. 31, 2016
CNY (¥)
|
Dec. 31, 2015
CNY (¥)
|
|
| Income/(Loss) from Domestic and Foreign Components Before Income Tax Expenses [Abstract] | ||||
| PRC | ¥ 2,266,075 | $ 348,289 | ¥ 1,263,223 | ¥ 1,292,104 |
| Non PRC | (4,534) | (697) | (14,371) | (15,913) |
| Income before income taxes | ¥ 2,261,541 | $ 347,592 | ¥ 1,248,852 | ¥ 1,276,191 |