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

Schedule II-A—Valuation and Qualifying Accounts

Allowance for Doubtful Accounts Receivable (in thousands)

 

                                         
     Balance
at
                      

Fiscal Year Ended

    Beginning
      Additions Charged to     Deductions      Balance at
End of
Period		  
   of
Period		      Costs and
Expenses		      Other       

December 31, 2011

    $ 447         —         $ (107 )      —         $ 340   

December 31, 2010

    $ 636         —         $ (189 )      —         $ 447   

December 31, 2009

    $ 472       $ 164         —          —         $ 636