Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Rental Property:
Land	$ 109,116	$ 104,656
Buildings	695,119	654,518
Tenant improvements	35,394	34,900
Building and land improvements	24,436	22,153
Less: accumulated depreciation	(52,257)	(46,175)
Total rental property, net	811,808	770,052
Cash and cash equivalents	11,980	19,006
Restricted cash	7,540	5,497
Tenant accounts receivable, net	10,373	9,351
Prepaid expenses and other assets	3,657	1,556
Deferred financing fees, net	5,903	4,704
Leasing commissions, net	2,276	1,674
Goodwill	4,923	4,923
Due from related parties	300	806
Deferred leasing intangibles, net	190,243	187,555
Total assets	1,049,003	1,005,124
Liabilities:
Mortgage notes payable	228,844	229,915
Unsecured credit facility	20,000	99,300
Unsecured term loans	175,000	150,000
Accounts payable, accrued expenses and other liabilities	8,832	12,111
Interest rate swaps	469	480
Tenant prepaid rent and security deposits	6,808	5,686
Dividends and distributions payable	16,122	11,301
Deferred leasing intangibles, net	6,852	6,871
Total liabilities	462,927	515,664
Commitments and contingencies
Equity:
Preferred stock, par value $0.01 per share, 10,000,000 shares authorized, 2,760,000 shares (liquidation preference of $25.00 per share) issued and outstanding at March 31, 2013 and December 31, 2012	69,000	69,000
Common stock, par value $0.01 per share, 100,000,000 shares authorized, 42,221,072 and 35,698,582 shares issued and outstanding at March 31, 2013 and December 31, 2012, respectively	422	357
Additional paid-in capital	524,843	419,643
Common stock dividends in excess of earnings	(75,383)	(61,024)
Accumulated other comprehensive loss	(361)	(371)
Total stockholders' equity	518,521	427,605
Noncontrolling interest	67,555	61,855
Total equity	586,076	489,460
Total liabilities and equity	$ 1,049,003	$ 1,005,124