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Consolidating Financial Statements (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2008
ASSETS        
Current Assets $ 1,119,914 $ 1,154,686    
Current assets associated with discontinued operations 4,013 5,918    
Total current assets 1,123,927 1,160,604    
Property, plant and equipment, net 3,004,452 3,092,652 3,404,354  
Goodwill 0 196,680 195,164  
Investments in affiliates 0 0    
Intangible and other assets, net 232,283 282,428    
Intercompany receivables 0 0    
Long-term assets associated with discontinued operations 0 9,172    
Total long-term assets 3,236,735 3,580,932    
Total assets 4,360,662 4,741,536    
LIABILITIES AND EQUITY        
Current Liabilities 663,498 742,649    
Current liabilities associated with discontinued operations 6,383 15,554    
Total current liabilities 669,881 758,203    
Long-term debt 1,773,039 1,897,147    
Intercompany payables 0 0    
Other long-term liabilities 223,560 270,651    
Long-term liabilities associated with discontinued operations 14,140 13,111    
Total liabilities 2,680,620 2,939,112    
Total equity 1,680,042 1,802,424 1,816,859 2,228,077
Total liabilities and equity 4,360,662 4,741,536    
Parent [Member]
        
ASSETS        
Current Assets 93 160    
Current assets associated with discontinued operations 0 0    
Total current assets 93 160    
Property, plant and equipment, net 0 0    
Goodwill   0    
Investments in affiliates 1,813,197 1,998,616    
Intangible and other assets, net 18,389 17,343    
Intercompany receivables 945,401 1,118,405    
Long-term assets associated with discontinued operations 0 0    
Total long-term assets 2,776,987 3,134,364    
Total assets 2,777,080 3,134,524    
LIABILITIES AND EQUITY        
Current Liabilities 11,122 21,320    
Current liabilities associated with discontinued operations 0 0    
Total current liabilities 11,122 21,320    
Long-term debt 1,083,649 1,298,165    
Intercompany payables 0 0    
Other long-term liabilities 2,267 12,615    
Long-term liabilities associated with discontinued operations 0 0    
Total liabilities 1,097,038 1,332,100    
Total equity 1,680,042 1,802,424    
Total liabilities and equity 2,777,080 3,134,524    
Subsidiary Issuer [Member]
        
ASSETS        
Current Assets 0 0    
Current assets associated with discontinued operations 0 0    
Total current assets 0 0    
Property, plant and equipment, net 0 0    
Goodwill   0    
Investments in affiliates 1,774,029 1,991,518    
Intangible and other assets, net 39,168 40,594    
Intercompany receivables 1,068,746 1,207,450    
Long-term assets associated with discontinued operations 0 0    
Total long-term assets 2,881,943 3,239,562    
Total assets 2,881,943 3,239,562    
LIABILITIES AND EQUITY        
Current Liabilities 3,147 3,147    
Current liabilities associated with discontinued operations 0 0    
Total current liabilities 3,147 3,147    
Long-term debt 143,750 143,750    
Intercompany payables 921,849 1,094,049    
Other long-term liabilities 0 0    
Long-term liabilities associated with discontinued operations 0 0    
Total liabilities 1,068,746 1,240,946    
Total equity 1,813,197 1,998,616    
Total liabilities and equity 2,881,943 3,239,562    
Guarantor Subsidiaries [Member]
        
ASSETS        
Current Assets 563,927 559,367    
Current assets associated with discontinued operations 0 0    
Total current assets 563,927 559,367    
Property, plant and equipment, net 1,513,366 1,680,256    
Goodwill   146,876    
Investments in affiliates 1,687,806 1,967,403    
Intangible and other assets, net 78,836 147,513    
Intercompany receivables 99,075 72,714    
Long-term assets associated with discontinued operations 0 0    
Total long-term assets 3,379,083 4,014,762    
Total assets 3,943,010 4,574,129    
LIABILITIES AND EQUITY        
Current Liabilities 353,827 352,409    
Current liabilities associated with discontinued operations 0 0    
Total current liabilities 353,827 352,409    
Long-term debt 0 0    
Intercompany payables 1,705,911 2,096,523    
Other long-term liabilities 109,243 133,679    
Long-term liabilities associated with discontinued operations 0 0    
Total liabilities 2,168,981 2,582,611    
Total equity 1,774,029 1,991,518    
Total liabilities and equity 3,943,010 4,574,129    
Other Subsidiaries [Member]
        
ASSETS        
Current Assets 555,882 595,151    
Current assets associated with discontinued operations 4,013 5,918    
Total current assets 559,895 601,069    
Property, plant and equipment, net 1,491,086 1,412,396    
Goodwill   49,804    
Investments in affiliates 0 0    
Intangible and other assets, net 134,678 115,766    
Intercompany receivables 637,165 889,073    
Long-term assets associated with discontinued operations 0 9,172    
Total long-term assets 2,262,929 2,476,211    
Total assets 2,822,824 3,077,280    
LIABILITIES AND EQUITY        
Current Liabilities 308,320 368,346    
Current liabilities associated with discontinued operations 6,383 15,554    
Total current liabilities 314,703 383,900    
Long-term debt 545,640 455,232    
Intercompany payables 122,627 97,070    
Other long-term liabilities 137,908 160,564    
Long-term liabilities associated with discontinued operations 14,140 13,111    
Total liabilities 1,135,018 1,109,877    
Total equity 1,687,806 1,967,403    
Total liabilities and equity 2,822,824 3,077,280    
Eliminations [Member]
        
ASSETS        
Current Assets 12 8    
Current assets associated with discontinued operations 0 0    
Total current assets 12 8    
Property, plant and equipment, net 0 0    
Goodwill   0    
Investments in affiliates 5,275,032 (5,957,537)    
Intangible and other assets, net (38,788) (38,788)    
Intercompany receivables (2,750,387) (3,287,642)    
Long-term assets associated with discontinued operations 0 0    
Total long-term assets (8,064,207) (9,283,967)    
Total assets (8,064,195) (9,283,959)    
LIABILITIES AND EQUITY        
Current Liabilities (12,918) (2,573)    
Current liabilities associated with discontinued operations 0 0    
Total current liabilities (12,918) (2,573)    
Long-term debt 0 0    
Intercompany payables (2,750,387) (3,287,642)    
Other long-term liabilities (25,858) (36,207)    
Long-term liabilities associated with discontinued operations 0 0    
Total liabilities (2,789,163) (3,326,422)    
Total equity (5,275,032) (5,957,537)    
Total liabilities and equity $ (8,064,195) $ (9,283,959)