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Inventories (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Inventory [Line Items]    
Inventories $ 33,967 $ 40,167
Refrigerant and cylinders
   
Inventory [Line Items]    
Inventories 8,238 9,893
Packaged refrigerants
   
Inventory [Line Items]    
Inventories $ 25,729 $ 30,274