Financial Instruments Fair Value, by Balance Sheet Grouping (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified |
Dec. 31, 2011
Senior Notes [Member]
2013 Senior Notes [Member]
Carrying Amount [Member]
|
Dec. 31, 2010
Senior Notes [Member]
2013 Senior Notes [Member]
Carrying Amount [Member]
|
Dec. 31, 2011
Senior Notes [Member]
2013 Senior Notes [Member]
Estimated Fair Value [Member]
|
Dec. 31, 2010
Senior Notes [Member]
2013 Senior Notes [Member]
Estimated Fair Value [Member]
|
Dec. 31, 2011
Senior Notes [Member]
2016 Senior Notes [Member]
Carrying Amount [Member]
|
Dec. 31, 2010
Senior Notes [Member]
2016 Senior Notes [Member]
Carrying Amount [Member]
|
Dec. 31, 2011
Senior Notes [Member]
2016 Senior Notes [Member]
Estimated Fair Value [Member]
|
Dec. 31, 2010
Senior Notes [Member]
2016 Senior Notes [Member]
Estimated Fair Value [Member]
|
Jul. 31, 2005
Convertible Senior Unsecured Notes [Member]
|
Dec. 31, 2011
Convertible Senior Unsecured Notes [Member]
Carrying Amount [Member]
|
Dec. 31, 2010
Convertible Senior Unsecured Notes [Member]
Carrying Amount [Member]
|
Dec. 31, 2011
Convertible Senior Unsecured Notes [Member]
Estimated Fair Value [Member]
|
Dec. 31, 2010
Convertible Senior Unsecured Notes [Member]
Estimated Fair Value [Member]
|
Dec. 31, 2011
Loans Payable [Member]
2007 Term Loan
Carrying Amount [Member]
|
Dec. 31, 2010
Loans Payable [Member]
2007 Term Loan
Carrying Amount [Member]
|
Dec. 31, 2011
Loans Payable [Member]
2007 Term Loan
Estimated Fair Value [Member]
|
Dec. 31, 2010
Loans Payable [Member]
2007 Term Loan
Estimated Fair Value [Member]
|
Dec. 31, 2010
Convertible Loans Payable [Member]
2008 Loans [Member]
|
Dec. 31, 2011
Convertible Loans Payable [Member]
2008 Loans [Member]
Carrying Amount [Member]
|
Dec. 31, 2010
Convertible Loans Payable [Member]
2008 Loans [Member]
Carrying Amount [Member]
|
Dec. 31, 2011
Convertible Loans Payable [Member]
2008 Loans [Member]
Estimated Fair Value [Member]
|
Dec. 31, 2010
Convertible Loans Payable [Member]
2008 Loans [Member]
Estimated Fair Value [Member]
|
Dec. 31, 2011
Investor [Member]
Convertible Loans Payable [Member]
2008 Loans [Member]
|
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Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||
Debt, Long-term and Related Party, Combined Amount, Fair Value | $ 550,000 | [1] | $ 550,000 | [1] | $ 555,500 | [1] | $ 541,750 | [1] | $ 1,642,418 | [1] | $ 1,637,723 | [1] | $ 1,650,630 | [1] | $ 1,523,082 | [1] | $ 194,724 | [2] | $ 179,129 | [2] | $ 186,740 | [2] | $ 131,660 | [2] | $ 298,000 | [3] | $ 298,000 | [3] | $ 292,728 | [3] | $ 297,464 | [3] | $ 282,293 | [4] | $ 262,657 | [4] | $ 282,293 | [4] | $ 262,657 | [4] | |||||||||||
Percentage of lenders | 96.60% | ||||||||||||||||||||||||||||||||||||||||||||||||||
Conversion price | $ 35.42 | $ 5.00 | |||||||||||||||||||||||||||||||||||||||||||||||||
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