Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Straight-line rent receivables	$ 70,500	$ 69,500
Prepaid assets	44,300	66,200
Additional long-lived assets, net	22,700	23,500
Accounts Receivable, after Allowance for Credit Loss, Current	13,000	9,700
Ground lease modification, net	9,400	9,900
Equity investments in joint ventures	8,100	8,500
Debt issuance costs, net	5,000	2,200
Project costs	4,600	2,200
Goodwill	3,500	3,487
Customer relationship intangible assets, net	2,500	1,700
Above-market intangible assets, net	1,200	16,800
Interest rate swap assets		200
Other	600	800
Other Assets	$ 185,426	$ 214,697