Interest and Debt Expense (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Interest Expense Debt [Abstract]
Interest expense	$ 118,252	$ 123,228
Amortization of deferred financing costs	4,812	5,378
Capitalized interest	(13,622)	(8,260)
Interest and Debt Expense, Total	$ 109,442	$ 120,346