XML 16 R33.htm IDEA: XBRL DOCUMENT v2.4.0.8
Organization and operations (Details)
 0 Months Ended
Mar. 31, 2014
property
state
Dec. 31, 2013
property
Jun. 10, 2013
Operating Partnership
Series D Convertible Units
Jun. 10, 2013
Operating Partnership
Series E Convertible Units
Organization and operations        
Number of properties 25,505 23,268    
Number of states 22      
Organization and operations        
Issuance of units (in shares)     4,375,000 4,375,000