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Other Financial Statement Information - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended 3 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Mar. 31, 2013
Maximum [Member]
Inventory [Line Items]      
Cost of inventories for certain materials using LIFO method $ 25.7 $ 25.1  
(Benefit) charge to earnings from LIFO inventory changes $ 0.1   $ 0.1