Intangibles - Acquired Lease Intangible Amortization (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
In-place leases
Finite-Lived Intangible Assets [Line Items]
Amortization expense related to in-place leases	$ 15,300	$ 4,133	$ 1,252
Above market leases
Finite-Lived Intangible Assets [Line Items]
Decrease of rental income	2,596	530	48
Leasehold interest
Finite-Lived Intangible Assets [Line Items]
Decrease of rental income	59	5	0
Below market in-place lease
Finite-Lived Intangible Assets [Line Items]
Increase of rental income	643	156	0
Above market ground lease
Finite-Lived Intangible Assets [Line Items]
Decrease (increase) of operating expense	16	4	0
Below Market Ground Lease
Finite-Lived Intangible Assets [Line Items]
Decrease (increase) of operating expense	$ 68	$ 0	$ 0