| 2011 | 2012 | ||
|---|---|---|---|
| CHF thousands | |||
| Depreciation of property, plant and equipment | 49,134 | 48,751 | |
| Impairment of property, plant and equipment | 9,350 | 13,171 | |
| Amortisation of intangible assets | 3,466 | 3,455 | |
| Impairment of intangible assets | 29,758 | - | |
| Total | 91,708 | 65,377 |
Impairment of property, plant and equipment and intangible assets is explained in Note 9 and 10.