Related Party Transactions (Amount Recorded in Pursuant to Related Party Arrangment) (Details) (Related Party [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Related Party [Member]
Related Party Transaction [Line Items]
Acquisition fees (general and administrative costs)	$ 8		$ 32
Asset management fees (general and administrative costs)	711		713
Property management fees (property operating expenses)	290		348
Development fees and leasing commissions	411	[1]	164	[1]
Total	$ 1,420		$ 1,257

[1] Generally, capitalized and amortized over the estimated useful life of the associated asset.