Quarterly report pursuant to sections 13 or 15(d)

Summary of Significant Accounting Policies - Schedule of Future Amortization of Lease Origination Costs, Financing Costs and in Place Leases (Detail)

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Summary of Significant Accounting Policies - Schedule of Future Amortization of Lease Origination Costs, Financing Costs and in Place Leases (Detail) (USD $)
9 Months Ended
Sep. 30, 2012
Lease Origination Costs [Member]
 
Future Amortization Of Deferred Costs And Other Assets [Line Items]  
2013 $ 44,403
2014 35,257
2015 27,153
2016 16,316
2017 9,972
Thereafter 8,969
Total 142,070
Lease Origination Costs [Member] | Subsidiaries [Member]
 
Future Amortization Of Deferred Costs And Other Assets [Line Items]  
2013 71,004
2014 58,090
2015 46,084
2016 35,741
2017 31,586
Thereafter 32,952
Total 275,457
Financing Costs [Member]
 
Future Amortization Of Deferred Costs And Other Assets [Line Items]  
2013 6,964
2014 2,185
Total 9,149
Leases, Acquired-in-Place [Member]
 
Future Amortization Of Deferred Costs And Other Assets [Line Items]  
2013 1,779
2014 1,779
2015 1,779
2016 1,779
2017 2,787
Thereafter 3,467
Total $ 13,370