CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Real estate properties:
Land	$ 243,584	$ 244,655
Buildings and improvements	1,281,140	1,288,813
Total real estate properties, at cost, gross	1,524,724	1,533,468
Accumulated depreciation	(182,967)	(175,482)
Total real estate properties, at cost, net	1,341,757	1,357,986
Acquired real estate leases, net	138,273	144,484
Cash and cash equivalents	3,586	5,255
Restricted cash	2,164	1,553
Rents receivable, net	31,011	29,099
Deferred leasing costs, net	8,301	7,661
Deferred financing costs, net	5,271	5,718
Due from related persons	286
Other assets, net	9,321	10,378
Total assets	1,539,970	1,562,134
LIABILITIES AND SHAREHOLDERS' EQUITY
Unsecured revolving credit facility	27,500	49,500
Unsecured term loan	350,000	350,000
Mortgage notes payable	92,526	93,127
Accounts payable and accrued expenses	19,820	19,208
Due to related persons	2,741	3,719
Assumed real estate lease obligations, net	18,196	19,129
Total liabilities	510,783	534,683
Commitments and contingencies
Shareholders' equity:
Common shares of beneficial interest, $.01 par value: 70,000,000 shares authorized, 54,664,118 and 54,643,888 shares issued and outstanding, respectively	547	547
Additional paid in capital	1,104,497	1,103,982
Cumulative net income	162,019	137,293
Cumulative other comprehensive income	91	99
Cumulative common distributions	(237,967)	(214,470)
Total shareholders' equity	1,029,187	1,027,451
Total liabilities and shareholders' equity	$ 1,539,970	$ 1,562,134