Interest and Debt Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Interest and Debt Expense [Abstract]
Interest expense	$ 405,169	$ 430,278	$ 444,412
Amortization of deferred financing costs	32,161	45,263	23,673
Capitalized interest and debt expenses	(59,305)	(62,786)	(42,303)
Interest and Debt Expense, Total	$ 378,025	$ 412,755	$ 425,782