|
Segment and geographic information (Details 2) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2012
|
Sep. 30, 2012
|
Jun. 30, 2012
|
Mar. 31, 2012
|
Dec. 31, 2011
|
Sep. 30, 2011
|
Jun. 30, 2011
|
Mar. 31, 2011
|
Dec. 31, 2012
|
Dec. 31, 2011
|
Dec. 31, 2010
|
|
| Revenue and Assets | |||||||||||
| Project Revenue | $ 113,952 | $ 106,305 | $ 101,421 | $ 118,699 | $ 79,158 | $ 5,035 | $ 5,107 | $ 4,595 | $ 440,377 | $ 93,895 | $ 1,051 |
| Property, plant, and equipment, net | 2,055,510 | 1,388,254 | 2,055,510 | 1,388,254 | |||||||
|
United States
|
|||||||||||
| Revenue and Assets | |||||||||||
| Project Revenue | 227,212 | 58,109 | 1,051 | ||||||||
| Property, plant, and equipment, net | 1,504,809 | 816,744 | 1,504,809 | 816,744 | |||||||
|
Canada
|
|||||||||||
| Revenue and Assets | |||||||||||
| Project Revenue | 213,165 | 35,786 | |||||||||
| Property, plant, and equipment, net | $ 550,701 | $ 571,510 | $ 550,701 | $ 571,510 | |||||||