Identified Intangible Assets and Liabilities - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Below Market Leases Net Of Above Market Leases
Finite-Lived Intangible Assets [Line Items]
Increase to rental income	$ 19,830	$ 38,573	$ 46,103
Other Identified Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 8,666	$ 18,018	$ 25,057