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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2011
Commitments and Contingencies [Abstract]  
Capital and Operating Leases
                         
    Capital     Operating        
    Leases     Leases     Total  
    (In Thousands)  
2012
  $ 412     $ 5,635     $ 6,047  
2013
    349       4,585       4,934  
2014
    36       3,453       3,489  
2015
          1,554       1,554  
2016
          1,127       1,127  
Thereafter
          3,913       3,913  
 
                 
Total minimum lease payments
    797     $ 20,267     $ 21,064  
 
                   
Less amounts representing interest
    48                  
 
                     
Present value of minimum lease payments included in long-term debt
  $ 749