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Leases (Tables)
 12 Months Ended
Dec. 31, 2011
Leases [Abstract]  
Tenant Leases
The tenants' rental payments included in the table below are through the current terms with a maximum current term of 20 years and do not assume exercise of tenant renewal options. 
 
Years Ending December 31,
 
2012
 
2013
 
2014
 
2015
 
2016
 
Thereafter
 
Total
Tenant leases
$
1,661,458

 
$
1,666,996

 
$
1,631,813

 
$
1,575,337

 
$
1,468,813

 
$
9,185,611

 
$
17,190,028
Operating Leases
 
Years Ending December 31,
 
2012
 
2013
 
2014
 
2015
 
2016
 
Thereafter
 
Total
Operating leases
$
301,264

 
$
305,278

 
$
307,267

 
$
308,801

 
$
311,242

 
$
3,907,901

 
$
5,441,753