Interest and Debt Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Interest and Debt Expense [Abstract]
Interest expense	$ 100,295	$ 95,328
Amortization of deferred financing costs	9,265	7,456
Capitalized interest and debt expense	(9,071)	(11,110)
Interest and Debt Expense, Total	$ 100,489	$ 91,674