Quarterly report pursuant to Section 13 or 15(d)

Credit facilities (Details)

v2.4.0.6
Credit facilities (Details)
In Millions, unless otherwise specified
Dec. 31, 2012
Credit Facility
USD ($)
Item
Jan. 25, 2008
Credit Facility
USD ($)
Jan. 25, 2008
Swingline loans
USD ($)
Jan. 25, 2008
Letters of credit
USD ($)
Dec. 31, 2012
Letters of credit held by a customer
USD ($)
Item
Dec. 31, 2012
Letters of credit issued in relation to the Company's insurance policies
USD ($)
Item
Dec. 31, 2012
Letter of credit (Other than Revolving Credit Agreement)
USD ($)
Item
Dec. 31, 2012
Atlantic Innovation Fund of Canada
USD ($)
Item
Dec. 31, 2012
Atlantic Innovation Fund of Canada
CAD
Dec. 31, 2012
Performance Bonds
USD ($)
Sep. 30, 2011
Performance Bonds
USD ($)
Credit facilities                      
Maximum borrowing capacity   $ 35.0 $ 5.0 $ 25.0              
Number of letters of credit issued 5       3 2 2        
Amount outstanding 15.5       15.2 0.3 3.0        
Current borrowing capacity 19.5                    
Maximum borrowing capacity under loan                 1.8    
Number of remaining quarterly installments               38 38    
Amount outstanding               1.7 1.7    
Performance bond commitments                   $ 50.4 $ 48.0