Purchase Accounting for Acquisitions of Real Estate (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011
Total revenue	$ 27,985	[1]	$ 25,985	[1]
Income before discontinued operations	$ 11,612	[1]	$ 12,283	[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, 2012 or January 1, 2011 and may not be indicative of future operating results.