Real Estate - Amortization of Intangible Assets and Other Leasing Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule of amortization expense
Above and below market leases, net	$ (2,292)	$ (3,201)	$ (685)
Tenant origination and absorption cost	62,459	69,502	55,464
Ground leasehold amortization (below market)	(291)	(52)	27
Other leasing costs amortization	$ 4,908	$ 3,581	$ 3,557