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Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2011
Summary of Significant Accounting Policies [Abstract]  
Goodwill relates to business acquisitions
                 
    December 31,  
    2011     2010  
    (In Thousands)  
Climate Control
  $ 103     $ 103  
Chemical
    1,621       1,621  
 
           
Total goodwill
  $ 1,724     $ 1,724  
 
           
Shipping and handling costs included in net sales and Selling, General and Administrative Expense
                         
    2011     2010     2009  
    (In Thousands)  
Climate Control:
                       
Shipping and handling costs — SG&A (1)
  $ 8,564     $ 7,706     $ 7,910  
 
                 
Chemical:
                       
Shipping costs — Net sales (2)
  $ 26,179     $ 22,436     $ 15,897  
 
                 
Handling costs — SG&A (1)
  $ 5,024     $ 5,137     $ 5,691  
 
                 
     
(1)  
See discussion above under “Selling, General and Administrative Expense.”
 
(2)  
These costs relate to amounts billed to our customers.
Advertising and promotion of products
                         
    2011     2010     2009  
    (In Thousands)  
Advertising costs
  $ 4,528     $ 5,149     $ 5,915