Real Estate Investments (Schedule of Annualized Rental Income by Major Tenants) (Details)	6 Months Ended
	Jun. 30, 2012
Citizens Bank [Member]
Revenue, Major Customer [Line Items]
Annualized Rental Income	38.20%
John Deere [Member]
Revenue, Major Customer [Line Items]
Annualized Rental Income	13.40%
Home Depot [Member]
Revenue, Major Customer [Line Items]
Annualized Rental Income	12.80%
GSA [Member]
Revenue, Major Customer [Line Items]
Annualized Rental Income	13.00%