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Schedule II - Valuation And Qualifying Accounts
 12 Months Ended
Dec. 31, 2011
Schedule II - Valuation And Qualifying Accounts [Abstract]  
Schedule II - Valuation And Qualifying Accounts

SCHEDULE II

VALUATION AND QUALIFYING ACCOUNTS

 

                                 
     Balance  at
Beginning
of Period		      Charged to
Costs and
Expenses		     Deductions/
Write-offs 		     Balance at
End of
Period		  
          
          
     (In thousands)  

Year ended December 31, 2011

                                   

Allowance for doubtful accounts

    $ 97       $ (71 )    $ 5       $ 21   

Year ended December 31, 2010

                                   

Allowance for doubtful accounts

    $ 207       $ (40 )    $ 70       $ 97   

Year ended December 31, 2009

                                   

Allowance for doubtful accounts

    $             436       $             (167 )    $             62       $             207