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Debt - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended
Sep. 30, 2012
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2012
Non-US lines of credit
Sep. 30, 2012
Term Loan
Dec. 31, 2012
Term Loan
Feb. 22, 2012
Term Loan
Dec. 31, 2011
Term Loan
Dec. 31, 2012
Term Loan
Base Rate Borrowings
Minimum
Dec. 31, 2012
Term Loan
Base Rate Borrowings
Maximum
Dec. 31, 2012
Term Loan
Libor Borrowings
Minimum
Dec. 31, 2012
Term Loan
Libor Borrowings
Maximum
Dec. 31, 2012
Term Loan
13-24
Dec. 31, 2012
Term Loan
25-36
Sep. 30, 2012
ABL Facility
Dec. 31, 2012
ABL Facility
Feb. 22, 2012
ABL Facility
Dec. 31, 2012
ABL Facility
Letter of Credit
Dec. 31, 2012
ABL Facility
Base Rate Borrowings
Minimum
Dec. 31, 2012
ABL Facility
Base Rate Borrowings
Maximum
Dec. 31, 2012
ABL Facility
Libor Borrowings
Minimum
Dec. 31, 2012
ABL Facility
Libor Borrowings
Maximum
Dec. 31, 2012
ABL Facility
Term Loan
Dec. 31, 2012
ABL Facility
Term Loan
Non-US lines of credit
Dec. 31, 2012
ABL Facility
Term Loan
Capital Lease Obligations
Debt Instrument [Line Items]                                                    
Secured credit facility         $ 14.5                         $ 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   6.7     0.3   4.2 215.0                                    
Maturing date of Term loan             Feb. 22, 2017                                      
Date of commencement of installation             Mar. 31, 2013                                      
Prepayment premium, description             First 12 months                                      
Prepayment premium, interest rate                           2.75% 2.00%                      
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   61.6                                                
Remaining borrowing capacity   29.2                             25.7                  
Maturities payment, 2013                                               5.0    
Maturities payment, 2014                                               7.4    
Maturities payment, 2015                                               7.9    
Maturities payment, 2016                                               9.3    
Maturities payment, 2017                                               128.2    
Maturities payment, thereafter                                               128.2    
Maturities payment, 2012                                                 0.3 0.5
Fair value of aggregate borrowings             208.5   221.4                                  
Interest paid   $ 20.6 $ 16.1 $ 9.7                                            
Weighted average interest rate on short-term borrowings   5.15%