Debt (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Interest Expense	$ 57,876	$ 49,317	$ 56,298
Amortization-deferred financing costs	10,548	11,054	8,984
Loss on extinguishment of debt	2,898		5,342
Capitalized interest	(20,577)	(13,074)	(10,302)
Deferred interest	(3,562)	1,658	3,584
Interest rate derivatives, net	(1,106)	(1,090)	2,627
Interest income	(529)	(275)	(1,108)
Interest and other financing costs, net	45,548	47,590	65,425
Parent company
Interest and other financing costs, net	$ 20,559	$ 9,997	$ 542