Recent Transactions (Acquisitions) (Narrative) (Details) $ in Thousands		6 Months Ended
	Apr. 01, 2015 USD ($) item	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)
Real Estate Properties [Line Items]
Purchase price of property		$ 42,881	$ 41,825
City Square Project [Member]
Real Estate Properties [Line Items]
Number of units | item	365
Purchase price of property	$ 3,100
Contingent consideration	$ 1,250
Minimum project start period	12 months	12 months
Total project costs	$ 91,400