Accounts Receivable (Schedule Of Accounts Receivable Net Of Allowance For Doubtful Accounts) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Sep. 30, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, Total	$ 102,607	$ 105,449
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, Total	99,083	101,153
U.S. Government and prime contractors [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, Total	$ 3,524	$ 4,296