|
Assets Held for Development (Summary) (Details) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2012
|
Dec. 31, 2011
|
|---|---|---|
| Assets Held for Development [Line Items] | ||
| Total assets held for development, net of impairment | $ 331,770 | $ 1,089,819 |
|
Land | Echelon Infrastructure
|
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| Assets Held for Development [Line Items] | ||
| Assets held for development | 453,013 | 215,969 |
|
Construction and Development Costs | Echelon Infrastructure
|
||
| Assets Held for Development [Line Items] | ||
| Assets held for development | 499,842 | 500,787 |
|
Construction and Development Costs | Echelon Central Energy Facility
|
||
| Assets Held for Development [Line Items] | ||
| Assets held for development | 163,519 | 163,806 |
|
Project Management and Other Costs | Echelon Infrastructure
|
||
| Assets Held for Development [Line Items] | ||
| Assets held for development | 115,712 | 115,712 |
|
Professional and Design Fees | Echelon Infrastructure
|
||
| Assets Held for Development [Line Items] | ||
| Assets held for development | 93,545 | 93,545 |
|
Echelon Development
|
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| Assets Held for Development [Line Items] | ||
| Assets held for development | 1,325,631 | 1,089,819 |
| Impairment | 993,861 | 0 |
| Total assets held for development, net of impairment | $ 331,770 | $ 1,089,819 |