Interest and Debt Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Interest and Debt Expense [Abstract]
Interest expense	$ 72,345	$ 98,841	$ 266,597	$ 290,006
Capitalized interest and debt expense	(16,047)	(18,238)	(59,184)	(49,718)
Amortization of deferred financing costs	5,150	8,348	19,527	24,486
Interest and debt expense, Total	$ 61,448	$ 88,951	$ 226,940	$ 264,774