Annual report pursuant to Section 13 and 15(d)

Properties, net (Details)

v3.6.0.2
Properties, net (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Properties        
Gross $ 3,874,715 $ 4,158,616 $ 4,014,336 $ 3,811,950
Operating properties, net 2,671,831 2,920,529    
Operating properties, net [Member]        
Properties        
Less: accumulated depreciation (706,385) (700,363)    
Operating properties, net 2,671,831 2,920,529    
Operating properties, net [Member] | Land [Member]        
Properties        
Gross 433,311 463,305    
Operating properties, net [Member] | Buildings and improvements [Member]        
Properties        
Gross $ 2,944,905 $ 3,157,587