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Schedule II - Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2013
Valuation And Qualifying Accounts [Abstract]  
Schedule II - Valuation and Qualifying Accounts

MKS INSTRUMENTS, INC.

SCHEDULE II—VALUATION AND QUALIFYING ACCOUNTS

 

            Additions              

Description

   

Balance at
Beginning of
Year

     

Charged to
Costs and
Expenses

    

Charged to
Other Accounts

    

Deductions &
Write-offs

    

Balance at
End of Year

  
     (Dollars in thousands)  

Accounts receivable allowance:

   

Years ended December 31,

            

2013

    $ 2,879       $ 2,564      $ (98 )    $ 2,594      $ 2,751   

2012

    $ 2,516       $ 3,452      $ —      $ 3,089      $ 2,879   

2011

    $ 2,557       $ 3,390      $ —      $ 3,431      $ 2,516   
            Additions              

Description

   

Balance at
Beginning of
Year

     

Charged to
Costs and
Expenses

    

Charged to
Other Accounts

    

  Deductions  

    

Balance at
End of Year

  
     (Dollars in thousands)  

Valuation allowance on deferred tax asset:

   

Years ended December 31,

   

2013

    $ 27,497       $ —      $ —      $ (395 )    $ 27,102   

2012

    $ 26,475       $ (44 )    $ 1,066        —      $ 27,497   

2011

    $ 25,267       $ —      $ 1,208      $ —      $ 26,475