Interest Expense (Interest Expense Schedule) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Interest Expense [Abstract]
Contractual interest on Convertible Debentures	$ 10,156	$ 10,156	$ 20,312	$ 20,313
Amortization of debt discount on the Convertible Debentures	1,975	1,819	3,910	3,602
Contingent interest to holders of Convertible Debentures	0	100,020	0	100,020
Interest capitalized to Property and equipment, net	(176)	(166)	(564)	(310)
Credit facility and other interest expense	625	27	1,262	51
Total interest expense	$ 12,580	$ 111,856	$ 24,920	$ 123,676