Intangible Assets (Textual) (Details) - Tenant Move-Outs Prior to End of the Lease Term [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Finite Lived Intangible Assets [Line Items]
Intangible Assets Written Off Through Accelerated Amortization	$ 0.5	$ 0.8	$ 1.6
Intangible Liabilities Written Off Through Accelerated Amortization