CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Real estate properties:
Land	$ 623,810	$ 623,756
Buildings and improvements	4,659,525	4,639,869
Total real estate properties, gross	5,283,335	5,263,625
Less accumulated depreciation	(873,157)	(840,760)
Total real estate properties, net	4,410,178	4,422,865
Cash and cash equivalents	32,967	39,233
Restricted cash	10,502	12,514
Deferred financing fees, net	26,810	27,975
Acquired real estate leases and other intangible assets, net	96,469	103,494
Other assets	201,742	158,585
Total assets	4,778,668	4,764,666
LIABILITIES AND SHAREHOLDERS' EQUITY
Unsecured revolving credit facility	145,000	100,000
Senior unsecured notes, net of discount	1,093,658	1,093,337
Secured debt and capital leases	695,668	699,427
Accrued interest	21,899	15,839
Assumed real estate lease obligations, net	11,773	12,528
Other liabilities	69,952	66,546
Total liabilities	2,037,950	1,987,677
Commitments and contingencies
Shareholders' equity:
Common shares of beneficial interest, $.01 par value: 199,700,000 shares authorized, 188,187,580 and 188,167,643 shares issued and outstanding at March 31, 2014 and December 31, 2013, respectively	1,882	1,882
Additional paid in capital	3,498,027	3,497,589
Cumulative net income	1,233,562	1,194,985
Cumulative other comprehensive income	6,511	8,412
Cumulative distributions	(1,999,264)	(1,925,879)
Total shareholders' equity	2,740,718	2,776,989
Total liabilities and shareholders' equity	$ 4,778,668	$ 4,764,666