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Debt (Details Textual) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 9 Months Ended 9 Months Ended 9 Months Ended 9 Months Ended 9 Months Ended 9 Months Ended 9 Months Ended
Sep. 30, 2012
Mar. 31, 2012
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2011
Sep. 30, 2012
Term Loan [Member]
Feb. 22, 2012
Term Loan [Member]
Sep. 30, 2012
Minimum [Member]
Term Loan [Member]
Sep. 30, 2012
Maximum [Member]
Term Loan [Member]
Sep. 30, 2012
Base rate borrowings [Member]
Minimum [Member]
Term Loan [Member]
Sep. 30, 2012
Base rate borrowings [Member]
Maximum [Member]
Term Loan [Member]
Sep. 30, 2012
LIBOR borrowings [Member]
Minimum [Member]
Term Loan [Member]
Sep. 30, 2012
LIBOR borrowings [Member]
Maximum [Member]
Term Loan [Member]
Sep. 30, 2012
13-24 [Member]
Term Loan [Member]
Sep. 30, 2012
25-36 [Member]
Term Loan [Member]
Sep. 30, 2012
Non-US lines of credit [Member]
Sep. 30, 2012
ABL Facility [Member]
Feb. 22, 2012
ABL Facility [Member]
Sep. 30, 2012
ABL Facility [Member]
Term Loan [Member]
Sep. 30, 2012
ABL Facility [Member]
Letters of credit [Member]
Sep. 30, 2012
ABL Facility [Member]
Base rate borrowings [Member]
Minimum [Member]
Sep. 30, 2012
ABL Facility [Member]
Base rate borrowings [Member]
Maximum [Member]
Sep. 30, 2012
ABL Facility [Member]
LIBOR borrowings [Member]
Minimum [Member]
Sep. 30, 2012
ABL Facility [Member]
LIBOR borrowings [Member]
Maximum [Member]
Sep. 30, 2012
ABL Facility [Member]
Non-US lines of credit [Member]
Term Loan [Member]
Sep. 30, 2012
ABL Facility [Member]
Capital lease obligations [Member]
Term Loan [Member]
Sep. 30, 2012
Secured revolving credit facility [Member]
Sep. 30, 2012
Note purchase agreement [Member]
Sep. 30, 2012
Master Note Purchase Agreement [Member]
Dec. 31, 2011
Prior Credit Agreement [Member]
Dec. 31, 2011
Prior Credit Agreement [Member]
Letters of credit [Member]
Debt (Textual) [Abstract]                                                              
Secured credit facility                               $ 14.1   $ 100.0   $ 50.0                      
Line of credit facility, term     5 years     5 years                                                  
Additional borrowing capacity                                 25                            
Base rate borrowings margin ranges                   9.00% 10.00% 10.00% 11.00%               1.00% 2.75% 1.75% 3.50%              
Commitment fee                                 0.50%                            
Line of credit facility, amount outstanding 6.9   6.9     5.7 215.0                 2.0                     240.0     180.0  
Maturing date of Term loan           Feb. 22, 2017                                         Apr. 25, 2012        
Date of commencement of installation           Mar. 31, 2013                                                  
Prepayment premium, description           first 12 months                                                  
Prepayment premium, interest rate                           2.75% 2.00%                                
Fixed Charge Ratio               1.00 1.50                                            
Leverage Ratio               1.00 2.00                                            
Line of credit facility, initiation date                                                     Apr. 25, 2007 Jun. 01, 2009 Jun. 01, 2003    
Remaining borrowing capacity 31.3   31.3                           24.7                         49.1 32.5
Prepayment of long term debt           65.0                         10.0                        
Prepayment penalty and accrued interest on prepayment of long term debt     0.1                                                        
Current borrowing capacity 62.9   62.9                                                        
Maturities payment, 2012                                     2.5           2.0 0.4          
Maturities payment, 2013                                     8.0                        
Maturities payment, 2014                                     32.6                        
Maturities payment, 2015                                     32.6                        
Maturities payment, 2016                                     32.4                        
Maturities payment, thereafter                                     51.8                        
Maximum amount of outstanding term loan           170.0                                                  
Outstanding long term debt 157.9   157.9   214.1                           156.0                        
Variance between actual and target loan                                     14.0                        
Quarterly payment of loan                                     3.5                        
Prepayment of the outstanding principal for the Term Loan                                     75.0                        
Debt (Additional Textual) [Abstract]                                                              
Breakage fees and premiums     1.0                                                        
Fair value of aggregate borrowings 185.2   185.2   221.4                                                    
Debt agreement termination costs   1.6                                                          
Debt agreement termination costs, whole interest     1.0                                                        
Write-off financing cost     0.6                                                        
Debt issuance costs     8.3                                                        
Deferred debt issuance costs 1.9   3.5                                                        
Payments of debt financing fees     6.9 2.3                                                      
Deferred financing fees total $ 5.1   $ 5.1   $ 1.0