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Basis of Preparation (Details) | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Feb. 29, 2012 | Sep. 30, 2012 | Sep. 30, 2012 item
Joint Venture disclosures |  |  |
Number of joint ventures in which company has controlling interest |  |  | 2
Tenancy in common interest (as a percent) |  | 50.00% |
Ownership percentage in VIE's | 90.00% |  |
Number of other unconsolidated joint ventures |  |  | 5
Unconsolidated JV in Plano, Texas |  |  |
Joint Venture disclosures |  |  |
Ownership percentage in VIE's | 90.00% |  |
Consolidated JV one |  |  |
Joint Venture disclosures |  |  |
Ownership interest in consolidated joint venture (as a percent) |  | 90.00% | 90.00%
Consolidated JV two |  |  |
Joint Venture disclosures |  |  |
Ownership interest in consolidated joint venture (as a percent) |  | 95.00% | 95.00%

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- Definition Represents the number of joint ventures in which entity has controlling interest. + References No definition available. + Details
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- Definition Represents the number of unconsolidated joint ventures of the entity that are not separately disclosed within the note disclosures. + References No definition available. + Details
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- Definition Represents the tenancy in common interest accounted for as an undivided interest in the assets, liabilities, revenues and expenses of the tenancy in common, expressed as a percentage. + References No definition available. + Details
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- Details
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- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
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- Definition Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 5A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=7880789&loc=SL6759159-111685 + Details
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