Interest Expense (Narrative) (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]
Interest paid to holders of the Convertible Debentures	$ 0	$ 100,020	$ 0	$ 100,020