Real Estate Investments (Schedule of Real Estate Properties) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($) property
Business Acquisition [Line Items]
Land		$ 60,590
Buildings, fixtures and improvements		129,140
Total tangible assets		189,730
Acquired intangibles:		12,292
Below-market lease liabilities		(18,618)
Cash paid for acquired real estate investments	$ 0	$ 202,022
Number of properties purchased | property		8
In-place leases [Member]
Business Acquisition [Line Items]
Acquired intangibles:		$ 27,005
Above-market lease assets [Member]
Business Acquisition [Line Items]
Acquired intangibles:		$ 3,905