Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross	$ 46,835		$ 46,835
Additions	269,164	$ 0
Accumulated amortization	(46,317)	(36,855)
Net definite lived intangible assets	269,682	9,980
Identifiable intangible assets – net	$ 284,758	25,056
Remaining useful life	23 years 10 months 24 days
Customer relationships
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross	$ 33,788		33,788
Additions	266,633	0
Accumulated amortization	(38,036)	(30,169)
Net definite lived intangible assets	$ 262,385	$ 3,619
Remaining useful life	24 years 2 months 12 days	9 years 1 month 6 days
Above-market leases
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross			143
Additions	$ 0
Accumulated amortization	(60)	$ (38)
Net definite lived intangible assets	$ 83	$ 105
Remaining useful life	3 years 9 months 18 days	4 years 9 months 18 days
In-place lease
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross			3,778
Additions	$ 0
Accumulated amortization	(1,578)	$ (1,004)
Net definite lived intangible assets	$ 2,200	$ 2,774
Remaining useful life	3 years 9 months 18 days	4 years 9 months 18 days
Below-market leases
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross			9,126
Additions	$ 0
Accumulated amortization	(5,794)	$ (5,644)
Net definite lived intangible assets	$ 3,332	$ 3,482
Remaining useful life	32 years 7 months 6 days	33 years 2 months 12 days
Assembled Workforce
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross	$ 0		0
Additions	908	$ 0
Accumulated amortization	(128)	0
Net definite lived intangible assets	$ 780	0
Remaining useful life	2 years 8 months 12 days
Trade names and trademarks
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross	$ 0		$ 0
Additions	1,623	0
Accumulated amortization	(721)	0
Net definite lived intangible assets	$ 902	0
Remaining useful life	9 months 18 days
Trade Name
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Indefinite lived intangible asset (Trade name)	$ 15,076	$ 15,076