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Supplemental Guarantor Financial Information (Details 2) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
ASSETS        
Current assets $ 1,216,222 $ 1,085,263    
Current assets associated with discontinued operations 21,746 38,664    
Total current assets 1,237,968 1,123,927    
Property, plant and equipment, net 2,842,031 2,934,664 3,014,598  
Intangible and other assets, net 174,848 222,851    
Long-term assets associated with discontinued operations   79,220    
Total long-term assets 3,016,879 3,236,735    
Total assets 4,254,847 4,360,662    
LIABILITIES AND EQUITY        
Current liabilities 762,967 653,739    
Current liabilities associated with discontinued operations 11,572 16,142    
Total current liabilities 774,539 669,881    
Long-term debt 1,564,923 1,773,039    
Other long-term liabilities 212,082 223,012    
Long-term liabilities associated with discontinued operations 1,044 14,688    
Total liabilities 2,552,588 2,680,620    
Total equity 1,702,259 1,680,042 1,802,424 1,816,859
Total liabilities and equity 4,254,847 4,360,662    
Parent
        
ASSETS        
Current assets 142 94    
Total current assets 142 94    
Investments in affiliates 1,631,185 1,531,223    
Intangible and other assets, net 33,234 57,556    
Intercompany receivables 704,319 1,092,298    
Total long-term assets 2,368,738 2,681,077    
Total assets 2,368,880 2,681,171    
LIABILITIES AND EQUITY        
Current liabilities 5,844 14,268    
Total current liabilities 5,844 14,268    
Long-term debt 884,423 1,227,399    
Other long-term liabilities   2,268    
Total liabilities 890,267 1,243,935    
Total equity 1,478,613 1,437,236    
Total liabilities and equity 2,368,880 2,681,171    
Guarantor Subsidiaries
        
ASSETS        
Current assets 754,303 562,964    
Total current assets 754,303 562,964    
Property, plant and equipment, net 1,299,797 1,504,399    
Investments in affiliates 1,145,551 1,456,782    
Intangible and other assets, net 37,748 78,835    
Intercompany receivables 83,362 96,378    
Total long-term assets 2,566,458 3,136,394    
Total assets 3,320,761 3,699,358    
LIABILITIES AND EQUITY        
Current liabilities 462,668 352,981    
Total current liabilities 462,668 352,981    
Intercompany payables 1,123,427 1,705,911    
Other long-term liabilities 103,481 109,243    
Total liabilities 1,689,576 2,168,135    
Total equity 1,631,185 1,531,223    
Total liabilities and equity 3,320,761 3,699,358    
Other Subsidiaries
        
ASSETS        
Current assets 461,810 522,193    
Current assets associated with discontinued operations 21,746 38,664    
Total current assets 483,556 560,857    
Property, plant and equipment, net 1,542,234 1,430,265    
Intangible and other assets, net 123,681 125,248    
Intercompany receivables 419,108 637,165    
Long-term assets associated with discontinued operations   79,220    
Total long-term assets 2,085,023 2,271,898    
Total assets 2,568,579 2,832,755    
LIABILITIES AND EQUITY        
Current liabilities 294,529 299,408    
Current liabilities associated with discontinued operations 11,572 16,142    
Total current liabilities 306,101 315,550    
Long-term debt 680,500 545,640    
Intercompany payables 83,362 119,930    
Other long-term liabilities 128,375 137,359    
Long-term liabilities associated with discontinued operations 1,044 14,688    
Total liabilities 1,199,382 1,133,167    
Total equity 1,369,197 1,699,588    
Total liabilities and equity 2,568,579 2,832,755    
Eliminations
        
ASSETS        
Current assets (33) 12    
Total current assets (33) 12    
Investments in affiliates (2,776,736) (2,988,005)    
Intangible and other assets, net (19,815) (38,788)    
Intercompany receivables (1,206,789) (1,825,841)    
Total long-term assets (4,003,340) (4,852,634)    
Total assets (4,003,373) (4,852,622)    
LIABILITIES AND EQUITY        
Current liabilities (74) (12,918)    
Total current liabilities (74) (12,918)    
Intercompany payables (1,206,789) (1,825,841)    
Other long-term liabilities (19,774) (25,858)    
Total liabilities (1,226,637) (1,864,617)    
Total equity (2,776,736) (2,988,005)    
Total liabilities and equity $ (4,003,373) $ (4,852,622)