Real Estate Investments (Assets Acquired) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2016 USD ($) property
Business Acquisition [Line Items]
Land	$ 1,729
Buildings, fixtures and improvements	29,664
Total tangible assets	31,393
Acquired leases	2,851
Above-market ground lease liability	(85)
Below-market lease liabilities	(774)
Cash paid for acquired real estate investments	$ 34,244
Number of properties purchased | property	4
In-place leases
Business Acquisition [Line Items]
Acquired leases	$ 3,162
Weighted-average amortization period	9 years 5 months 18 days
Above-market leases
Business Acquisition [Line Items]
Acquired leases	$ 548
Weighted-average amortization period	9 years 7 months
Above-market ground leases
Business Acquisition [Line Items]
Weighted-average amortization period	48 years 7 months
Below market leases
Business Acquisition [Line Items]
Weighted-average amortization period	9 years 6 months 6 days