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Basis of Presentation (Details)
0 Months Ended
Jul. 02, 2013
Subsequent event
Forecast
Mar. 12, 2012
SIR
Jul. 02, 2013
SIR
Jun. 30, 2013
SIR
property
Organization        
Issuance of shares, net 10,500,000 9,200,000    
Properties owned       43
Wholly owned subsidiary, common shares owned       22,000,000
Ownership percentage after offering 44.20%   44.20% 56.00%