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Summary of Significant Accounting Policies (Tables)
6 Months Ended
Jun. 30, 2013
Accounting Policies [Abstract]  
Investment in and valuation of real estate and related assets
Real estate assets, other than land, are depreciated or amortized on a straight-line basis. The estimated useful lives of the Company’s real estate assets by class are generally as follows:
Buildings
40 years
Tenant improvements
Lesser of useful life or lease term
Intangible lease assets
Lease term