Business (Details)	Mar. 31, 2012 SquareFeet outletcenters
Business [Abstract]
Number Of Owned And Operated Outlet Centers	36
Total Gross Leaseable Area of Outlet Centers	10,700,000.0
Number of Operated and Partially Owned Outlet Center	3
Gross Leaseable Area of Operated and Partially Owned Outlet Centers	1,200,000