| Concept |
As at 2017-12-31 |
As at 2017-12-31 |
As at 2016-12-31 |
As at 2016-12-31 |
As at 2015-12-31 |
As at 2015-12-31 |
As at 2014-12-31 |
As at 2014-12-31 |
As at 2013-12-31 |
As at 2013-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|
| Employees | ||||||||||
| Information about group | ||||||||||
| Number of employees of group | ||||||||||
| Number of employees |
394
xbrli:pure
|
xbrli:pure
|
370
xbrli:pure
|
396
xbrli:pure
|
358
xbrli:pure
|
388
xbrli:pure
|
348
xbrli:pure
|
383
xbrli:pure
|
317
xbrli:pure
|
352
xbrli:pure
|