Purchase Accounting for Acquisitions of Real Estate (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Total revenue	$ 10,362	[1]	$ 8,407	[1]
Income before discontinued operations	$ 4,452	[1]	$ 3,382	[1]

[1] This unaudited pro forma supplemental information does not purport to be indicative of what the Company operating results would have been had the acquisitions occurred on January 1, 2013 or January 1, 2012 and may not be indicative of future operating results. Various acquisitions were of newly leased or constructed assets and may not have been in service for the full periods shown.