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Basis of presentation and summary of significant accounting policies (Details)
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1 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
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Apr. 30, 2013
item
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Jun. 30, 2013
MW
state
province
project
|
Jun. 30, 2013
Gregory
|
Dec. 31, 2012
Delta-Person
|
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| Basis of presentation and summary of significant accounting policies | ||||
| Percentage of ownership interest | 17.10% | 40.00% | ||
| Gross generating capacity of project (in MW) | 3,018 | |||
| Ownership interest in operational power generation projects (in MW) | 2,098 | |||
| Number of operational power generation projects | 29 | |||
| Number of states in which power generation projects operate | 11 | |||
| Number of provinces in which power generation projects operate | 2 | |||
| Power of project that achieved commercial operations | 53 | |||
| Number of projects Which are wholly owned subsidiaries | 23 |