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Contingencies (Details) (Net sales, Major Customers, American Airlines, Inc. ("AAI"))
3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended
Jun. 30, 2013
Jun. 30, 2013
Jun. 30, 2012
Maximum
Jun. 30, 2012
Maximum
Legal Proceedings        
Concentration of risk (as a percent) 9.00% 14.00% 1.00% 6.00%