XML 79 R10.htm IDEA: XBRL DOCUMENT v2.4.0.6
Allowance for Doubtful Accounts
 12 Months Ended
Dec. 31, 2011
Allowance for Doubtful Accounts [Abstract]  
Allowance for Doubtful Accounts

4.    Allowance for Doubtful Accounts

Activity in the allowance for doubtful accounts for the years ended December 31, 2011, 2010 and 2009 was as follows:

 

                         
    2011     2010     2009  
    (In thousands)  

Balance, January 1

   $ 681     $ 372     $ 366  

Provision charged to operations:

                        

Additions to the reserve

     71       309       37  

Collections of previously reserved accounts

     (359 )      —       (31 ) 
   

 

 

    

 

 

    

 

 

  

Total charged (credited) to operations

     (288 )      309       6  

Non-recoverable balances written off

     —       —       —  
   

 

 

    

 

 

    

 

 

  

Balance, December 31

   $ 393     $ 681     $ 372