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Debt (Details) (USD $)
In Thousands, except Per Share data
Jun. 30, 2011
Dec. 31, 2010
Jun. 30, 2011
3.25% Convertible Notes due 2011 [Member]
Dec. 31, 2010
3.25% Convertible Notes due 2011 [Member]
Oct. 31, 2004
3.25% Convertible Notes due 2011 [Member]
Jun. 30, 2011
8.75% Senior Notes due 2015 [Member]
Dec. 31, 2010
8.75% Senior Notes due 2015 [Member]
Mar. 31, 2010
8.75% Senior Notes due 2015 [Member]
Jun. 30, 2011
9.75% Senior Secured Notes due 2015 [Member]
Dec. 31, 2010
9.75% Senior Secured Notes due 2015 [Member]
Aug. 31, 2009
9.75% Senior Secured Notes due 2015 [Member]
Jan. 31, 2011
11.25% Senior Secured Notes due 2013 [Member]
Dec. 31, 2010
11.25% Senior Secured Notes due 2013 [Member]
Oct. 31, 2010
11.25% Senior Secured Notes due 2013 [Member]
Jun. 30, 2009
11.25% Senior Secured Notes due 2013 [Member]
Jun. 30, 2011
13% Senior Notes due 2013 [Member]
Dec. 31, 2010
13% Senior Notes due 2013 [Member]
Jun. 30, 2011
7% Exchangeable Senior Subordinated Notes due 2014 [Member]
Dec. 31, 2010
7% Exchangeable Senior Subordinated Notes due 2014 [Member]
Aug. 31, 2008
7% Exchangeable Senior Subordinated Notes due 2014 [Member]
Jun. 30, 2011
7.625% Senior Notes due 2018 [Member]
Dec. 31, 2010
7.625% Senior Notes due 2018 [Member]
Oct. 31, 2010
7.625% Senior Notes due 2018 [Member]
Debt                                              
Conversion price per share     $ 5.30 $ 5.30 $ 5.30                         $ 1.875 $ 1.875 $ 1.875      
Debt carrying value     $ 23,866 $ 191,979   $ 800,000 $ 800,000   $ 257,000 $ 257,000   $ 36,685 $ 36,685 $ 489,065   $ 778,500 $ 778,500 $ 550,000 $ 550,000   $ 700,000 $ 700,000 $ 489,065
Debt discount     (24) (515)   (11,011) (12,213) 14,000 (9,260) (10,116) 12,708   (1,705)   37,352 (49,965) (59,592) (6,809) (7,620)   (11,488) (12,054)  
Other debt:                                              
Capital leases 4,151 7,229                                          
Total debt 3,024,960 3,217,578                                          
Less: total current maturities non-related party 25,894 195,815                                          
Total long-term 2,999,066 3,021,763                                          
Related party long-term debt 327,296 325,907                                          
Total long-term, excluding related party $ 2,671,770 $ 2,695,856