Condensed Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenues:
Rental income	$ 25,420	$ 21,294	$ 73,903	$ 57,483
Interest income	618	176	979	393
Total revenues	26,038	21,470	74,882	57,876
Expenses:
Depreciation and amortization	7,496	6,850	22,356	19,227
Interest	9,538	7,624	25,384	22,726
General and administrative	3,778	4,652	11,588	10,245
Total expenses	20,812	19,126	59,328	52,198
Net income	$ 5,226	$ 2,344	$ 15,554	$ 5,678
Net income per common share, basic (USD per shares)	$ 0.14	$ 0.07	$ 0.42	$ 0.20
Net income per common share, diluted (USD per shares)	$ 0.14	$ 0.07	$ 0.42	$ 0.20
Weighted-average number of common shares outstanding, basic (in shares)	37,178,162	32,986,657	37,121,384	27,797,411
Weighted-average number of common shares outstanding, diluted (in shares)	37,465,114	33,049,621	37,276,013	27,891,690