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ACCOUNTING POLICIES (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Organization And Accounting Policies [Line Items]          
Senior Notes $ 400,000   $ 400,000    
Convertible Debt 60,200   60,200    
Debt Instrument, Fair Value Disclosure $ 367,000   $ 367,000    
Common Stock, Dividends, Per Share, Declared $ 0.005 $ 0.005 $ 0.010 $ 0.010  
Senior Secured Notes 6.875 Percent [Member]          
Organization And Accounting Policies [Line Items]          
Debt Instrument, Interest Rate, Stated Percentage 6.875%   6.875%    
Senior Notes $ 400,000   $ 400,000    
5.625% convertible senior subordinated notes [Member]          
Organization And Accounting Policies [Line Items]          
Debt Instrument, Interest Rate, Stated Percentage 5.625%   5.625%    
Convertible Debt $ 60,161   $ 60,161   $ 60,161