Corporate Indebtedness - Schedule of Consolidated Interest Expense, Excluding Capitalized Interest (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Interest expense
Interest expense before capitalized interest	$ 63,607	$ 64,078	$ 185,163	$ 180,550
Interest on financing leases	813	0	2,425	0
Interest capitalized	(15,700)	(8,504)	(38,228)	(22,785)
Interest income	(608)	(406)	(3,563)	(1,070)
Interest expense, net	$ 48,112	$ 55,168	$ 145,797	$ 156,695