Subsequent Events (Details) (USD $)	3 Months Ended		9 Months Ended		1 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Oct. 17, 2014 Subsequent Event [Member] Atlanta, GA Industrial Property/Land Parcel Disposition (10/2014) [Member]
Subsequent Event [Line Items]
Purchase price of real estate					$ 11,400,000
Gain on disposition of property	$ 36,238,000	$ 34,000	$ 42,185,000	$ (3,000)	$ 1,700,000