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Leasing Activity
12 Months Ended
Dec. 31, 2011
Leasing Activity [Abstract]  
Operating Leases of Lessor Disclosure [Text Block]
LEASING ACTIVITY
Future minimum rental payments due from tenants under noncancelable operating leases as of December 31, 2011 are as follows (in thousands):
2012
 
$
471,541

2013
 
418,995

2014
 
352,486

2015
 
288,527

2016
 
230,557

Thereafter
 
677,843

 
 
 
TOTAL
 
$
2,439,949


In addition to minimum rental payments, most leases require the tenants to pay for their pro rata share of specified operating expenses. These payments are included as operating expense reimbursement in the accompanying consolidated statements of operations.