|
Credit facilities (Details)
In Millions, unless otherwise specified |
0 Months Ended | 3 Months Ended | 3 Months Ended | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Mar. 15, 2013
Credit Facility
USD ($)
|
Dec. 31, 2013
Credit Facility
Base Rate
|
Dec. 31, 2013
Credit Facility
Euro currency Rate
|
Dec. 31, 2013
Credit Facility
Index Rate
|
Dec. 31, 2013
Credit Facility
Minimum
|
Dec. 31, 2013
Credit Facility
Minimum
Base Rate
|
Dec. 31, 2013
Credit Facility
Minimum
Euro currency Rate
|
Dec. 31, 2013
Credit Facility
Minimum
Index Rate
|
Dec. 31, 2013
Credit Facility
Maximum
|
Dec. 31, 2013
Credit Facility
Maximum
Base Rate
|
Dec. 31, 2013
Credit Facility
Maximum
Euro currency Rate
|
Dec. 31, 2013
Credit Facility
Maximum
Index Rate
|
Mar. 15, 2013
Swingline loans
USD ($)
|
Dec. 31, 2013
Letters of credit
USD ($)
Item
|
Mar. 15, 2013
Letters of credit
USD ($)
|
Dec. 31, 2013
Letters of credit
Minimum
|
Dec. 31, 2013
Letters of credit
Maximum
|
Dec. 31, 2013
Letter of credit (Other than Revolving Credit Agreement)
USD ($)
Item
|
Dec. 31, 2013
Atlantic Innovation Fund of Canada
USD ($)
Item
|
Dec. 31, 2013
Atlantic Innovation Fund of Canada
CAD
|
Dec. 31, 2013
Performance Bonds
USD ($)
|
Sep. 30, 2012
Performance Bonds
USD ($)
|
|
| Credit facilities | ||||||||||||||||||||||
| Term of the credit agreement | 5 years | |||||||||||||||||||||
| Maximum borrowing capacity | $ 100.0 | $ 5.0 | $ 30.0 | 1.8 | ||||||||||||||||||
| Number of letters of credit issued | 4 | 2 | ||||||||||||||||||||
| Amount outstanding | 14.7 | 3.0 | ||||||||||||||||||||
| Leverage ratio | 2.5 | |||||||||||||||||||||
| Leverage ratio, actual | 0.1 | |||||||||||||||||||||
| Leverage ratio to calculate annual commitment fee (as a percent) | 0.15% | 0.30% | ||||||||||||||||||||
| Variable rate basis | Base Rate | Eurocurrency Rate | Index Rate | |||||||||||||||||||
| Margin (as a percent) | 0.00% | 1.00% | 1.00% | 0.75% | 1.75% | 1.75% | ||||||||||||||||
| Interest charges (as a percent) | 0.00% | 0.00% | ||||||||||||||||||||
| Number of remaining quarterly installments | 34 | 34 | ||||||||||||||||||||
| Amount outstanding | 1.4 | 1.5 | ||||||||||||||||||||
| Performance bond commitments | $ 49.0 | $ 50.8 | ||||||||||||||||||||