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Fair Value Measurements on Non-Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified | 9 Months Ended
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Sep. 30, 2011
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items] |  |
Long-lived Assets Impairment | $ (8,813) |
Long-lived Assets Held and Used | 64,604 | [1]
Long-lived Assets Held and Used Impairment | (3,369) | [1]
Long-lived Assets Held for Sale or Sold | 25,502 | [1]
Long-lived Assets Held for Sale or Sold Impairment | (5,444) | [1]
Fair Value, Measurements, Nonrecurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items] |  |
Long-lived Assets Held and Used |  | [1]
Long-lived Assets Held for Sale or Sold |  | [1]
Fair Value, Measurements, Nonrecurring [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items] |  |
Long-lived Assets Held and Used |  | [1]
Long-lived Assets Held for Sale or Sold |  | [1]
Fair Value, Measurements, Nonrecurring [Member] | Unobservable Inputs (Level 3) [Member] |  |
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items] |  |
Long-lived Assets Held and Used | 64,604 | [1]
Long-lived Assets Held for Sale or Sold | $ 25,502 | [1]
[1] | Excludes industrial properties and land parcels for which an impairment reversal of $11,116 was recorded during the nine months ended September 30, 2011, since the related assets are recorded at carrying value, which is lower than estimated fair value at September 30, 2011.

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- Definition Assets held and used long lived fair value disclosure. + References No definition available. + Details
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- Definition Long lived assets held and used impairment. + References No definition available. + Details
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- Definition Long lived assets held for sale impairment. + References No definition available. + Details
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- Definition Long-lived assets impairment. + References No definition available. + Details
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- Definition Long-lived assets that are held for sale apart from normal operations and anticipated to be sold in less than one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 33 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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