Lease Agreements (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012 outletcenters
Operating Leases, Future Minimum Payments Receivable [Line Items]
Number Of Owned And Operated Outlet Centers	36
Operating Leases, Future Minimum Payments Receivable, Current	$ 207,650
Operating Leases, Future Minimum Payments Receivable, in Two Years	181,391
Operating Leases, Future Minimum Payments Receivable, in Three Years	159,730
Operating Leases, Future Minimum Payments Receivable, in Four Years	131,306
Operating Leases, Future Minimum Payments Receivable, in Five Years	101,993
Operating Leases, Future Minimum Payments Receivable, Thereafter	231,946
Operating Leases, Future Minimum Payments Receivable	$ 1,014,016
Consolidated Properties [Member]
Operating Leases, Future Minimum Payments Receivable [Line Items]
Number of Stores	2,300