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Leasing Activity (Tables)
12 Months Ended
Dec. 31, 2011
Operating Leased Assets [Line Items]  
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
2012
 
$
471,541

2013
 
418,995

2014
 
352,486

2015
 
288,527

2016
 
230,557

Thereafter
 
677,843

 
 
 
TOTAL
 
$
2,439,949