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Acquisitions (Schedule Of Estimated Fair Value Of The Assets Acquired And Liabilities Assumed In Business Acquisition) (Details) - USD ($) $ in Thousands | Aug. 31, 2015 | Jan. 22, 2015 | Aug. 31, 2014 | Aug. 31, 2013
--- | --- | --- | --- | ---
Business Acquisition [Line Items] |  |  |  |
Goodwill | $ 76,801 |  | $ 37,021 | $ 37,414
Elecsys [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Cash and cash equivalents |  | $ 3,401 |  |
Receivables |  | 2,006 |  |
Inventories |  | 8,467 |  |
Other current assets |  | 1,527 |  |
Property and equipment |  | 6,457 |  |
Intangible assets |  | 24,490 |  |
Goodwill |  | 39,986 |  |
Other long-term assets |  | 41 |  |
Accounts payable and accrued liabilities |  | (2,862) |  |
Current and long-term debt |  | (2,478) |  |
Other long-term liabilities |  | (10,458) |  |
Total cash consideration |  | 70,577 |  |
Total cash consideration, net of cash acquired |  | 67,176 |  |
Total purchase price |  | $ 69,654 |  |

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