Intangible Assets and Liabilities - Summary of Intangible Amortization (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Amortization recorded against rental income related to above and (below) market leases
Schedule of Finite-Lived Intangible Assets and Liabilities [Line Items]
Amortization of intangible assets and liabilities	$ (491)	$ (62)
Rental expense related to above and (below) market leasehold interests
Schedule of Finite-Lived Intangible Assets and Liabilities [Line Items]
Amortization of intangible assets and liabilities	0	277
Amortization expense related to in place leases and tenant relationships
Schedule of Finite-Lived Intangible Assets and Liabilities [Line Items]
Amortization of intangible assets and liabilities	$ 14,665	$ 17,648