CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Real estate properties, at cost:
Land	$ 1,360,773	$ 1,389,594
Buildings, improvements and equipment	4,775,323	4,909,488
Total real estate properties, gross	6,136,096	6,299,082
Accumulated depreciation	(1,367,868)	(1,370,592)
Total real estate properties, net	4,768,228	4,928,490
Properties held for sale	123,025	7,125
Cash and cash equivalents	8,303	4,882
Restricted cash (FF&E reserve escrow)	50,196	80,621
Other assets, net	183,821	171,168
Total assets	5,133,573	5,192,286
LIABILITIES AND SHAREHOLDERS' EQUITY
Revolving credit facility	149,000	144,000
Senior notes, net of discounts	1,887,891	1,886,356
Convertible senior notes, net of discount	78,823	77,484
Mortgage payable		3,383
Security deposits	106,422	105,859
Accounts payable and other liabilities	103,668	107,297
Due to related persons	3,713	2,912
Dividends payable	4,754	4,754
Total liabilities	2,334,271	2,332,045
Commitments and contingencies
Preferred shares of beneficial interest, no par value, 100,000,000 shares authorized:
Common shares of beneficial interest, $.01 par value; 150,000,000 shares authorized; 123,521,535 and 123,444,235 issued and outstanding, respectively	1,235	1,234
Additional paid in capital	3,463,534	3,462,169
Cumulative net income	2,232,953	2,042,513
Cumulative other comprehensive income	1,605	2,231
Cumulative preferred distributions	(213,281)	(183,401)
Cumulative common distributions	(3,076,883)	(2,854,644)
Total shareholders' equity	2,799,302	2,860,241
Total liabilities and shareholders' equity	5,133,573	5,192,286
Series B
Preferred shares of beneficial interest, no par value, 100,000,000 shares authorized:
Preferred shares	83,306	83,306
Series C
Preferred shares of beneficial interest, no par value, 100,000,000 shares authorized:
Preferred shares	$ 306,833	$ 306,833