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Segment Information (Narrative) (Details) | 12 Months Ended
--- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2012
General Electric [Member] | Sales [Member] |  |  |
Percentage of total attributable to major customer | 15.00% | 15.00% | 14.00%
General Electric [Member] | Trade Accounts Receivable [Member] |  |  |
Percentage of total attributable to major customer | 12.00% | 11.00% |
U.S. Government Related [Member] | Sales [Member] |  |  |
Percentage of total attributable to major customer | 17.00% | 21.00% | 18.00%
U.S. Government Related [Member] | Trade Accounts Receivable [Member] |  |  |
Percentage of total attributable to major customer | 2.00% | 4.00% |

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