Annual report pursuant to Section 13 and 15(d)

Rentals Under Operating Leases (Details)

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Rentals Under Operating Leases (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Rentals Under Operating Leases [Abstract]      
2013 $ 177,776    
2014 155,154    
2015 131,374    
2016 111,883    
2017 91,966    
Thereafter 259,546    
Operating Leases, Future Minimum Payments Receivable 927,699    
Percentage Rents 123 150 193
Reimbursement income $ 26,822 $ 25,528 $ 21,877