Quarterly report pursuant to Section 13 or 15(d)

Credit facilities (Details)

v2.4.0.8
Credit facilities (Details)
In Millions, unless otherwise specified
0 Months Ended 9 Months Ended
Mar. 15, 2013
Credit Facility
USD ($)
Jun. 30, 2013
Credit Facility
Minimum
Jun. 30, 2013
Credit Facility
Maximum
Mar. 15, 2013
Swingline loans
USD ($)
Jun. 30, 2013
Letters of credit
USD ($)
Item
Mar. 15, 2013
Letters of credit
USD ($)
Jun. 30, 2013
Letter of credit (Other than Revolving Credit Agreement)
USD ($)
Item
Jun. 30, 2013
Atlantic Innovation Fund of Canada
USD ($)
Item
Jun. 30, 2013
Atlantic Innovation Fund of Canada
CAD
Jun. 30, 2013
Performance Bonds
USD ($)
Sep. 30, 2012
Performance Bonds
USD ($)
Credit facilities                      
Term of the credit agreement 5 years                    
Maximum borrowing capacity $ 100     $ 5   $ 30          
Number of letters of credit issued         5   2        
Amount outstanding         15.5   3.0        
Leverage ratio   2.5                  
Leverage ratio, actual     0.5                
Maximum borrowing capacity under loan                 1.8    
Interest charges (as a percent)               0.00% 0.00%    
Number of remaining quarterly installments               36 36    
Amount outstanding               1.5 1.6    
Performance bond commitments                   $ 50.9 $ 48.0