| Debt and Debt-Related Parties Schedule of Long Term Debt (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2012 | Dec. 31, 2011 | Mar. 31, 2012
 Senior Notes [Member] | Dec. 31, 2010
 Senior Notes [Member] | Mar. 31, 2012
 Senior Notes [Member]
 Long-term Debt Discount [Member] | Dec. 31, 2010
 Senior Notes [Member]
 Long-term Debt Discount [Member] | Mar. 31, 2012
 Loans Payable [Member]
 2007 Term Loan | Dec. 31, 2010
 Loans Payable [Member]
 2007 Term Loan | Mar. 31, 2012
 Convertible Loans Payable [Member]
 2008 Loans [Member] | Dec. 31, 2010
 Convertible Loans Payable [Member]
 2008 Loans [Member] | Mar. 31, 2012
 Convertible Senior Unsecured Notes [Member] | Dec. 31, 2010
 Convertible Senior Unsecured Notes [Member] | Mar. 31, 2012
 Convertible Senior Unsecured Notes [Member]
 Current Debt Discount [Member] | Dec. 31, 2010
 Convertible Senior Unsecured Notes [Member]
 Current Debt Discount [Member] | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Debt Instrument [Line Items] | ||||||||||||||
| Current debt | $ 204,630 | $ 502,630 | $ 0 | $ 298,000 | $ 204,630 | $ 204,630 | ||||||||
| Debt discount | (21,908) | (23,082) | (5,700) | (9,906) | ||||||||||
| Total current debt, net of discount | 198,893 | 492,724 | ||||||||||||
| Long-term debt (including related parties) | 2,497,793 | 2,497,793 | 2,215,500 | 2,215,500 | 282,293 | 282,293 | ||||||||
| Total long-term debt, (including related parties), net of discount | $ 2,475,885 | $ 2,474,711 |