Fee and Other Income (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Other Operating Income
Management, development, financing and other fee income	$ 11,200,000	$ 13,200,000	$ 35,100,000	$ 40,900,000
Ancillary and other property income	7,500,000	5,700,000	21,700,000	14,800,000
Lease termination fees	2,600,000	500,000	3,900,000	4,100,000
Other miscellaneous		200,000	500,000	2,000,000
Other Operating Income	$ 21,295,000	$ 19,646,000	$ 61,236,000	$ 61,764,000