Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Other Intangible Assets (Details Textuals)

 v2.3.0.11
Goodwill and Other Intangible Assets (Details Textuals) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Years
acre
Jun. 30, 2010
Other Intangible Assets [Line Items]        
Remaining weighted average amortization periods in years     12.6  
Goodwill and Other Intangible Assets (Textuals) [Abstract]        
Expenses for the amortization of intangible assets $ 6.9 $ 9.1 $ 13.1 $ 14.9
Customer relationships [Member]
       
Other Intangible Assets [Line Items]        
Remaining weighted average amortization periods in years     12.1  
Backlog [Member]
       
Other Intangible Assets [Line Items]        
Remaining weighted average amortization periods in years     1.9  
Trade Names [Member]
       
Other Intangible Assets [Line Items]        
Remaining weighted average amortization periods in years     28.4  
Non-compete agreements [Member]
       
Other Intangible Assets [Line Items]        
Remaining weighted average amortization periods in years     2.8  
Patented rights and developed technology [Member]
       
Other Intangible Assets [Line Items]        
Remaining weighted average amortization periods in years     9.3