| 
           Derivative Instruments and Hedging Activities (Details Textual 1) (USD $) 
        In Millions, unless otherwise specified  | 
        12 Months Ended | ||
|---|---|---|---|
| 
           Dec. 31, 2011 
         | 
        
           Dec. 31, 2011
 
          Foreign exchange currency contracts [Member] 
         | 
        
           Dec. 31, 2010
 
          Foreign exchange currency contracts [Member] 
         | 
      |
| Derivatives, Fair Value [Line Items] | |||
| Derivative liability Fair Value | $ 0 | $ 0.8 | |
| Cash Flow Hedge Loss Reclassified to Earnings | $ 1.3 | ||
| Period over which cash flow hedge loss reclassified to earnings | next 12 Months | 
| X | ||||||||||
| 
             
- Definition 
          Cash flow hedge gain loss to be reclassified into earnings. No definition available. 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Estimated amount of cash flow hedge loss expected to be reclassified to earnings in next twelve months. No definition available. 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Fair value of all liability derivatives designated as cash flow hedging instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Details 
          
  |