Noncontrolling Interests (Narrative) (Details) (Indura [Member])
6 Months Ended
Mar. 31, 2015
Jul. 02, 2012
Indura [Member]
   
Noncontrolling Interest [Line Items]    
Percentage equity interest purchased   64.80%
Minority interest ownership percentage under put option 30.50%  
Put option exercise period start date Jul. 01, 2015  
Put option exercise period beginning 1 July 2015 2 years  
Current ownership percentage 67.30%