Real Property Acquisitions and Development (Details 1) (USD $)	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012
Unaudited pro forma consolidated results of operations
Revenues	$ 3,047,072,000	$ 2,487,332,000
Income from continuing operations attributable to common stockholders	$ 17,091,000	$ (50,424,000)
Income from continuing operations attributable to common stockholders per share:
Basic	$ 0.06	$ (0.23)
Diluted	$ 0.06	$ (0.23)

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The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

-URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463

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The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

+ References

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