Property and equipment, net (Details) ¥ in Thousands, $ in Thousands |
12 Months Ended | |||
|---|---|---|---|---|
|
Dec. 31, 2017
CNY (¥)
|
Dec. 31, 2016
CNY (¥)
|
Dec. 31, 2015
CNY (¥)
|
Dec. 31, 2017
USD ($)
|
|
| Property, Plant and Equipment [Line Items] | ||||
| Total | ¥ 1,846,506 | ¥ 1,840,250 | ||
| Less: Accumulated depreciation | (494,825) | (359,329) | ||
| Net book value | 1,351,681 | 1,480,921 | $ 206,863 | |
| Depreciation expenses | 211,200 | 175,600 | ¥ 91,500 | |
| Buildings [Member] | ||||
| Property, Plant and Equipment [Line Items] | ||||
| Total | 1,172,239 | 1,172,236 | ||
| Computers and equipment [Member] | ||||
| Property, Plant and Equipment [Line Items] | ||||
| Total | 466,595 | 463,461 | ||
| Motor vehicles [Member] | ||||
| Property, Plant and Equipment [Line Items] | ||||
| Total | 6,356 | 7,173 | ||
| Furniture and fixtures [Member] | ||||
| Property, Plant and Equipment [Line Items] | ||||
| Total | 20,254 | 19,008 | ||
| Leasehold improvements [Member] | ||||
| Property, Plant and Equipment [Line Items] | ||||
| Total | 142,827 | 138,463 | ||
| Software [Member] | ||||
| Property, Plant and Equipment [Line Items] | ||||
| Total | ¥ 38,235 | ¥ 39,909 | ||