Interest and Debt Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Interest and Debt Expense [Abstract]
Interest expense	$ 335,016	$ 389,136	$ 359,819
Capitalized interest and debt expense	(72,200)	(73,166)	(48,231)
Amortization of deferred financing costs	23,807	31,979	34,066
Interest and debt expense	$ 286,623	$ 347,949	$ 345,654