Notes Payable, Long Term Debt and Other Obligations Non Cash Interest Expense (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Notes Payable Long Term Debt and Other Obligations [Abstract]
Amortization of debt discount	$ 3,437	$ 2,282
Amortization of deferred finance costs	710	1,417
Gain on 3.875% Variable Interest Senior Convertible Debentures converted	(2)	0
Non-cash Interest Expense	$ 4,145	$ 3,699