Investments in Real Estate - Acquisitions (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Apr. 27, 2016	Mar. 31, 2016	Mar. 31, 2015
Investments [Abstract]
Closing costs		$ 600
Business Acquisition [Line Items]
Land		17,315	$ 748
Building and improvements		128,945	30,086
Below market leasehold interests		1,099	2,350
Above market leases		840	398
In place leases		15,919	2,181
Below market leases		(5,382)	(463)
Above market leasehold interests		(50)	0
Net assets acquired		158,686	35,300
Other, net		3,321	0
Aggregate purchase price		$ 162,007	$ 35,300
Subsequent Event
Business Acquisition [Line Items]
Aggregate purchase price	$ 204,800