Business (Narratives) (Details)	Sep. 30, 2012 sqft property quantity
Business and Basis of Presentation
Number Of Real Estate Properties Owned And Managed	995
Number of real estate properties	430
Number of tenants	133
Occupany rate	98.40%
Number of self storage properties	21
Wm. Polk Carey Estate Ownership Percentage in the Reporting Entity	27.92%
Additional disclosures
Square footage of all real estate properties	39,100,000
Self storage and Hotel
Additional disclosures
Square footage of all real estate properties	800,000