Organization (Details Textual) (USD $)
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0 Months Ended | ||||||
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Dec. 31, 2012
Property
|
Dec. 31, 2011
Property
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Mar. 31, 2009
Common Stock [Member]
Distribution Reinvestment Plan [Member]
|
Aug. 31, 2005
Common Stock [Member]
IPO [Member]
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Aug. 31, 2005
Common Stock [Member]
IPO [Member]
Distribution Reinvestment Plan [Member]
|
Aug. 01, 2007
Common Stock [Member]
Second Public Offering [Member]
|
Aug. 01, 2007
Common Stock [Member]
Second Public Offering [Member]
Distribution Reinvestment Plan [Member]
|
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Class of Stock [Line Items] | |||||||
Number of shares issued | 50,000,000 | 500,000,000 | 40,000,000 | 500,000,000 | 40,000,000 | ||
Share price | $ 10.00 | $ 9.50 | $ 10.00 | $ 9.50 | |||
Number of company owned commercial real estate properties | 794 | 964 |