Corporate Indebtedness - Schedule of Consolidated Interest Expense, Excluding Capitalized Interest (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Interest expense
Interest expense before capitalized interest	$ 185,934	$ 246,848	$ 236,719
Interest on financing leases	8,091	3,243	8,069
Interest capitalized	(75,167)	(55,446)	(34,162)
Interest income	(2,179)	(4,124)	(1,957)
Interest expense, net	$ 116,679	$ 190,521	$ 208,669