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Goodwill and Other Intangible Assets - Goodwill (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Goodwill [Line Items]        
Impairments of goodwill recognized $ 0 $ 0 $ 0 $ 0
Energy Chemical Technologies [Member]
       
Goodwill [Line Items]        
Goodwill acquired     $ 6,000,000