| 
           Debt (Details) (USD $) 
        In Thousands, except Per Share data, unless otherwise specified  | 
        
           Dec. 31, 2011 
         | 
        
           Dec. 31, 2010 
         | 
        
           Dec. 31, 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] 
         | 
        
           Dec. 31, 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] 
         | 
        
           Dec. 31, 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] 
         | 
        
           Dec. 31, 2011
 
          11.25% Senior Secured Notes due 2013 [Member] 
         | 
        
           Dec. 31, 2010
 
          11.25% Senior Secured Notes due 2013 [Member] 
         | 
        
           Jun. 30, 2009
 
          11.25% Senior Secured Notes due 2013 [Member] 
         | 
        
           Dec. 31, 2011
 
          13% Senior Notes due 2013 [Member] 
         | 
        
           Dec. 31, 2010
 
          13% Senior Notes due 2013 [Member] 
         | 
        
           Dec. 31, 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] 
         | 
        
           Dec. 31, 2011
 
          7.625% Senior Notes due 2018 [Member] 
         | 
        
           Dec. 31, 2010
 
          7.625% Senior Notes due 2018 [Member] 
         | 
      
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Debt | |||||||||||||||||||||
| Conversion price per share | $ 5.30 | $ 5.30 | $ 1.875 | $ 1.875 | |||||||||||||||||
| Debt carrying value | $ 0 | $ 191,979 | $ 800,000 | $ 800,000 | $ 257,000 | $ 257,000 | $ 0 | $ 36,685 | $ 778,500 | $ 778,500 | $ 550,000 | $ 550,000 | $ 700,000 | $ 700,000 | |||||||
| Less: discounts | 0 | (515) | (9,753) | (12,213) | (14,000) | (8,356) | (10,116) | (12,708) | 0 | (1,705) | (37,352) | (39,504) | (59,592) | (5,956) | (7,620) | (10,898) | (12,054) | ||||
| Other debt: | |||||||||||||||||||||
| Capital leases | 2,941 | 7,229 | |||||||||||||||||||
| Total debt | 3,013,974 | 3,217,578 | |||||||||||||||||||
| Less: total current maturities non-related party | 1,623 | 195,815 | |||||||||||||||||||
| Total long-term | 3,012,351 | 3,021,763 | |||||||||||||||||||
| Related party long-term debt | 328,788 | 325,907 | |||||||||||||||||||
| Total long-term, excluding related party | $ 2,683,563 | $ 2,695,856 |