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ACCOUNTING POLICIES (Details) (USD $)
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Mar. 31, 2012
7.875% senior secured notes [Member]
Dec. 31, 2011
7.875% senior secured notes [Member]
Mar. 31, 2012
5.625% convertible senior subordinated notes [Member]
Dec. 31, 2011
5.625% convertible senior subordinated notes [Member]
Organization And Accounting Policies [Line Items]            
Debt Instrument, Interest Rate, Stated Percentage     7.875%   5.625%  
Senior Notes $ 200,000,000   $ 200,000,000 $ 200,000,000    
Convertible Debt 112,900,000       112,881,000 112,881,000
Debt Instrument, Fair Value Disclosure 213,000,000          
Convertible Debt, Fair Value Disclosures 277,600,000          
Common Stock, Dividends, Per Share, Declared $ 0.005 $ 0.005        
Interest Paid 11,500,000 13,000,000        
Income Taxes Paid $ 10,700,000 $ 100,000