|
Segment and geographic information (Details 3) (Revenues, net, Consolidated revenue)
|
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
|
Sep. 30, 2013
|
Sep. 30, 2012
|
Sep. 30, 2013
|
Sep. 30, 2012
|
|
|
Ontario Electricity Financial Corp (OEFC)
|
||||
| Consolidated revenue concentration | ||||
| Percentage of consolidated revenue | 20.70% | 18.70% | 26.30% | 22.10% |
|
BC Hydro
|
||||
| Consolidated revenue concentration | ||||
| Percentage of consolidated revenue | 10.20% | 9.20% | 10.80% | 9.70% |
|
San Diego Gas & Electric (SD G&E)
|
||||
| Consolidated revenue concentration | ||||
| Percentage of consolidated revenue | 13.10% | 10.20% | ||