Discontinued Operations (Details Textuals)	3 Months Ended		9 Months Ended
	Sep. 30, 2011 Property Tenants	Sep. 30, 2010 Property Tenants	Sep. 30, 2011 Property Tenants Year sqft	Sep. 30, 2010 Tenants Property
Discontinued Operations (Textuals) [Abstract]
Number of properties sold	1	9	1	9