Quarterly report pursuant to Section 13 or 15(d)

Real Estate and Intangible Assets (Details 3)

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Real Estate and Intangible Assets (Details 3) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Schedule of revenue and earnings recognized on property acquired    
Rental Revenue $ 13,666 $ 12,014
Earnings 433 1,301
Egg Harbor Township, NJ [Member]
   
Schedule of revenue and earnings recognized on property acquired    
Acquisition Date Mar. 28, 2013  
Rental Revenue 5  
Earnings 5  
Ashburn, VA [Member]
   
Schedule of revenue and earnings recognized on property acquired    
Acquisition Date   Jan. 25, 2012
Rental Revenue   183
Earnings   $ 116