CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Real estate properties, at cost:
Land	$ 1,470,513	$ 1,453,399
Buildings, improvements and equipment	5,946,852	5,445,710
Total real estate properties, gross	7,417,365	6,899,109
Accumulated depreciation	(1,757,151)	(1,551,160)
Total real estate properties, net	5,660,214	5,347,949
Cash and cash equivalents	22,500	20,049
Restricted cash (FF&E reserve escrow)	30,873	40,744
Due from related persons	38,064	34,244
Other assets, net	215,893	192,475
Total assets	5,967,544	5,635,461
LIABILITIES AND SHAREHOLDERS' EQUITY
Unsecured revolving credit facility		320,000
Unsecured term loan	400,000	400,000
Senior notes, net of discounts	2,295,527	1,993,880
Convertible senior notes, net of discount	8,478	8,478
Security deposits	27,876	26,577
Accounts payable and other liabilities	130,448	132,032
Due to related persons	13,194	14,032
Dividends payable	5,166	6,664
Total liabilities	2,880,689	2,901,663
Commitments and contingencies
Preferred shares of beneficial interest, no par value, 100,000,000 shares authorized:
Common shares of beneficial interest, $.01 par value; 200,000,000 shares authorized; 149,606,024 and 123,637,424 issued and outstanding, respectively	1,496	1,236
Additional paid in capital	4,109,600	3,458,144
Cumulative net income	2,518,054	2,384,876
Cumulative other comprehensive income	15,952	2,770
Cumulative preferred distributions	(279,985)	(253,426)
Cumulative common distributions	(3,558,369)	(3,301,782)
Total shareholders' equity	3,086,855	2,733,798
Total liabilities and shareholders' equity	5,967,544	5,635,461
Series C
Preferred shares of beneficial interest, no par value, 100,000,000 shares authorized:
Preferred shares		161,873
Series D
Preferred shares of beneficial interest, no par value, 100,000,000 shares authorized:
Preferred shares	$ 280,107	$ 280,107