Condensed Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenues:
Rental income	$ 24,820	$ 18,628	$ 48,483	$ 36,190
Interest income	297	177	361	217
Total revenues	25,117	18,805	48,844	36,407
Expenses:
Depreciation and amortization	7,557	6,290	14,860	12,377
Interest	8,148	7,505	15,846	15,103
General and administrative	3,489	2,923	7,810	5,592
Total expenses	19,194	16,718	38,516	33,072
Net income	$ 5,923	$ 2,087	$ 10,328	$ 3,335
Net income per common share, basic (USD per shares)	$ 0.16	$ 0.08	$ 0.28	$ 0.13
Net income per common share, diluted (USD per shares)	$ 0.16	$ 0.08	$ 0.28	$ 0.13
Weighted-average number of common shares outstanding, basic (in shares)	37,147,942	25,154,284	37,092,683	25,140,781
Weighted-average number of common shares outstanding, diluted (in shares)	37,191,687	25,226,179	37,119,005	25,210,575