Fair Value Measurement (Tables)
6 Months Ended
Jun. 30, 2012
Fair Value Measurement [Abstract]  
Summary of estimated fair value, and related carrying amounts
                                 
    June 30, 2012     December 31, 2011  
(In thousands)   Carrying
Amount
    Estimated
Fair Value
    Carrying
Amount
    Estimated
Fair Value
 

Financial Assets:

                               

Cash and cash equivalents

  $ 78,003     $ 78,003     $ 56,213     $ 56,213  

Accounts receivable

    66,353       66,353       60,543       60,543  
         

Financial Liabilities:

                               

Senior Secured Notes

  $ 193,773     $ 217,913     $ 193,613     $ 220,961  

Accrued interest

    10,588       10,588       10,588       10,588