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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

SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS 

 

       Additions              
      Balance at
Beginning
of Period		      Charged/
(Credit)
to Expense		     Charged
to Other
Accounts		     Deductions     Balance at End
of Period		  
     (In thousands of dollars)  

Year ended December 31, 2013

            

Allowance for doubtful accounts

    $ 811       $ (130 )    $ (442 )   $ (109 )   $ 130   

Year ended December 31, 2012

            

Allowance for doubtful accounts

    $ 1,100       $ (314 )    $ 25     $ —     $ 811   

Year ended December 31, 2011:

            

Allowance for doubtful accounts

    $ 1,269       $ (52 )   $ —     $ (117 )   $ 1,100