CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Rental income	$ 41,923	$ 25,940	$ 80,999	$ 49,295
Expenses
Real estate taxes	4,637	2,764	9,094	5,332
Utility expenses	3,540	1,733	7,047	3,410
Other operating expenses	7,076	3,963	13,845	7,520
Depreciation and amortization	9,097	5,401	17,483	10,281
Acquisition related costs	1,009	1,011	1,838	1,855
General and administrative	2,566	1,623	4,909	3,082
Total expenses	27,925	16,495	54,216	31,480
Operating income	13,998	9,445	26,783	17,815
Interest and other income	20	16	35	68
Interest expense (including net amortization of debt premiums and deferred financing fees of $418, $624, $836 and $1,156, respectively)	(3,076)	(1,678)	(5,613)	(3,209)
Equity in earnings (losses) of an investee	46	(23)	83	(52)
Income before income tax expense	10,988	7,760	21,288	14,622
Income tax expense	(56)	(25)	(102)	(36)
Net income	$ 10,932	$ 7,735	$ 21,186	$ 14,586
Weighted average common shares outstanding (in shares)	40,506	31,261	40,503	30,178
Net income per common share (in dollars per share)	$ 0.27	$ 0.25	$ 0.52	$ 0.48