Intangible Assets - Net (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 44,682	$ 43,924
Accumulated Amortization	(13,062)	(11,121)
Intangible assets, net	$ 31,620	32,803
Lease acquisition costs
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Life (Years)	14 years 6 months
Finite-Lived Intangible Assets, Gross	$ 843	483
Accumulated Amortization	(191)	(99)
Intangible assets, net	$ 652	384
Favorable leases
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Life (Years)	29 years 8 months
Finite-Lived Intangible Assets, Gross	$ 35,650	35,116
Accumulated Amortization	(8,168)	(6,568)
Intangible assets, net	$ 27,482	28,548
Assembled occupancy
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Life (Years)	4 months 30 days
Finite-Lived Intangible Assets, Gross	$ 2,786	2,659
Accumulated Amortization	(2,778)	(2,631)
Intangible assets, net	$ 8	28
Trade name
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Life (Years)	30 years
Finite-Lived Intangible Assets, Gross	$ 733	733
Accumulated Amortization	(311)	(293)
Intangible assets, net	$ 422	440
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Life (Years)	18 years 2 months
Finite-Lived Intangible Assets, Gross	$ 4,670	4,933
Accumulated Amortization	(1,614)	(1,530)
Intangible assets, net	$ 3,056	$ 3,403