Real Estate Assets (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Dispositions [Abstract]
Gain on disposition of property	$ 1,157,000	$ 0
Building Dispositions [Member]
Dispositions [Abstract]
Number of buildings sold	2
Purchase price of real estate	3,500,000
Gain on disposition of property	400,000
Land Dispositions [Member]
Dispositions [Abstract]
Purchase price of real estate	2,500,000
Gain on disposition of property	$ 800,000