Discontinued Operations (Details) (USD $)	6 Months Ended
	Jun. 30, 2012
Summary of disposition activity
Gross Disposition Price	$ 108,500
Retail [Member] | Citizen Bank Branches - 30 Properties [Member]
Summary of disposition activity
Disposal Date	Various
Gross Disposition Price	27,400
Sq Ft	81,451
Retail [Member] | Lakewood Shopping Center I & II [Member]
Summary of disposition activity
Date	Jun. 21, 2012
Gross Disposition Price	31,500
Sq Ft	236,679
Industrial [Member] | Union Venture [Member]
Summary of disposition activity
Date	May 17, 2012
Gross Disposition Price	$ 49,600
Sq Ft	970,168