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Related Party Transactions - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended
Jun. 30, 2015
Sep. 30, 2015
Sep. 30, 2014
Armand Products Company      
Related Party Transaction [Line Items]      
Percentage of ownership interest   50.00% 50.00%
ArmaKleen Company      
Related Party Transaction [Line Items]      
Percentage of ownership interest   50.00% 50.00%
Natronx Technologies LLC      
Related Party Transaction [Line Items]      
Percentage of ownership interest   33.33% 33.33%
Impairment charge on remaining investment $ 17.0