Fee and Other Income (Details) (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Fee and other income
Management, development, financing and other fee income	$ 11,700,000	$ 12,200,000
Ancillary and other property income	6,200,000	6,900,000
Lease termination fees	500,000	600,000
Other miscellaneous	100,000	100,000
Total fee and other income	$ 18,534,000	$ 19,769,000