XML 15 R33.htm IDEA: XBRL DOCUMENT v2.4.0.6
Other Financial Statement Information (Details Textual) (USD $)
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2012
Other Financial Statement Information (Textual) [Abstract]      
Cost of Inventories for certain materials using LIFO method $ 27,800,000   $ 30,200,000
(Benefit) charge to earnings from LIFO inventory changes $ (30,000) $ 200,000