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Future Minimum Rent
6 Months Ended
Jun. 30, 2011
Future Minimum Rent [Abstract]  
Future Minimum Rent
 
10.   Future Minimum Rent
 
We have operating leases with tenants that expire at various dates through 2027 and are either subject to scheduled fixed increases or adjustments in rent based on the Consumer Price Index. Generally, the leases grant tenants renewal options. Leases also provide for additional rents based on certain operating expenses. Future contractual minimum rent under operating leases as of June 30, 2011 for future periods is summarized as follows:
 
         
Year Ending   (in thousands)  
 
Remaining 2011
  $ 153,705  
2012
    313,019  
2013
    293,621  
2014
    263,342  
2015
    210,150  
Thereafter
    658,754  
         
Total
  $ 1,892,591