Risk Management and Use of Derivative Financial Instruments (Textual) (Details) - Customer	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Rental Revenue [Member] \| Customer Concentration Risk [Member]
Derivatives Fair Value [Line Items]
Number of tenant accounted for 10% or more of the Company's rents	0	0	0

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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Balance Type:	na
Period Type:	duration