| Segment Information Segment Information (Narrative) (Details) | 6 Months Ended | 3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|---|
| Jun. 30, 2014
 EMEA [Member]
 Accounts Receivable [Member] | Jun. 30, 2013
 EMEA [Member]
 Accounts Receivable [Member] | Jun. 30, 2014
 EMEA [Member]
 Sales Revenue, Goods, Net [Member] | Jun. 30, 2013
 EMEA [Member]
 Sales Revenue, Goods, Net [Member] | Jun. 30, 2013
 United States and Canada [Member]
 Accounts Receivable [Member] | |
| Revenue, Major Customer [Line Items] | |||||
| Concentration Risk, Percentage | 16.70% | 12.40% | 12.10% | 10.40% | 11.20% | 
| X | ||||||||||
| 
- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
 | 
| X | ||||||||||
| 
- Details 
 |