CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Real estate properties:
Land	$ 243,584	$ 243,611
Buildings and improvements	1,283,094	1,279,343
Total real estate properties, at cost, gross	1,526,678	1,522,954
Accumulated depreciation	(190,581)	(175,052)
Total real estate properties, at cost, net	1,336,097	1,347,902
Assets of discontinued operations		10,278
Acquired real estate leases, net	132,233	144,401
Cash and cash equivalents	3,119	5,255
Restricted cash	1,736	1,553
Rents receivable, net	30,812	28,997
Deferred leasing costs, net	9,191	7,661
Deferred financing costs, net	4,822	5,718
Other assets, net	9,194	10,369
Total assets	1,527,204	1,562,134
LIABILITIES AND SHAREHOLDERS' EQUITY
Unsecured revolving credit facility	25,000	49,500
Unsecured term loan	350,000	350,000
Mortgage notes payable	91,939	93,127
Liabilities of discontinued operations		102
Accounts payable and accrued expenses	18,927	19,106
Due to related persons	2,849	3,719
Assumed real estate lease obligations, net	17,370	19,129
Total liabilities	506,085	534,683
Commitments and contingencies
Shareholders' equity:
Common shares of beneficial interest, $.01 par value: 70,000,000 shares authorized, 54,674,118 and 54,643,888 shares issued and outstanding, respectively	547	547
Additional paid in capital	1,104,803	1,103,982
Cumulative net income	177,223	137,293
Cumulative other comprehensive income	18	99
Cumulative common distributions	(261,472)	(214,470)
Total shareholders' equity	1,021,119	1,027,451
Total liabilities and shareholders' equity	$ 1,527,204	$ 1,562,134