Summary of Significant Accounting Policies - Fee and Other Income (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Other Income And Other Expense Disclosure [Line Items]
Management, development, financing and other fee income	$ 43,811	$ 47,539	$ 54,592
Ancillary and other property income	27,665	28,527	20,196
Lease termination fees	6,401	5,897	7,482
Other miscellaneous	384	607	2,123
Total fee and other income	$ 78,261	$ 82,570	$ 84,393