|
Goodwill And Other Intangible Assets And Liabilities (Estimated Useful Lives Of Intangible Assets Subject To Periodic Amortization On A Straight-Line Basis) (Detail)
|
9 Months Ended |
|---|---|
|
Sep. 30, 2012
|
|
|
Utility Contracts [Member]
|
|
| Finite-Lived Intangible Assets [Line Items] | |
| Intangible Assets Estimated Useful Life (years) | 5 years |
|
Permits [Member] | Minimum [Member]
|
|
| Finite-Lived Intangible Assets [Line Items] | |
| Intangible Assets Estimated Useful Life (years) | 15 years |
|
Permits [Member] | Maximum [Member]
|
|
| Finite-Lived Intangible Assets [Line Items] | |
| Intangible Assets Estimated Useful Life (years) | 28 years |
|
Leases [Member] | Minimum [Member]
|
|
| Finite-Lived Intangible Assets [Line Items] | |
| Intangible Assets Estimated Useful Life (years) | 1 year 6 months |
|
Leases [Member] | Maximum [Member]
|
|
| Finite-Lived Intangible Assets [Line Items] | |
| Intangible Assets Estimated Useful Life (years) | 4 years 6 months |
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
|