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Industry Segment Information (Schedule Of Revenue By Geographical Areas) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Aug. 31, 2015 | May. 31, 2015 | Feb. 28, 2015 | Nov. 30, 2014 | Aug. 31, 2014 | May. 31, 2014 | Feb. 28, 2014 | Nov. 30, 2013 | Aug. 31, 2015 | Aug. 31, 2014 | Aug. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Total Revenues | $ 123,540 | [1] | $ 160,707 | $ 141,089 | $ 134,845 | $ 147,522 | [1] | $ 169,936 | $ 152,804 | $ 147,671 | $ 560,181 | $ 617,933 | $ 690,848
Total Long-Lived Assets | 78,656 |  |  |  |  | 72,457 |  |  |  |  | 78,656 | 72,457 | 65,064
United States [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Total Revenues |  |  |  |  |  |  |  |  |  |  | 350,290 | 377,652 | 428,929
Total Long-Lived Assets | 61,332 |  |  |  |  | 55,378 |  |  |  |  | 61,332 | 55,378 | 53,894
International [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Total Revenues |  |  |  |  |  |  |  |  |  |  | 209,891 | 240,281 | 261,919
Total Long-Lived Assets | $ 17,324 |  |  |  |  | $ 17,079 |  |  |  |  | $ 17,324 | $ 17,079 | $ 11,170
Revenues [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage |  |  |  |  |  |  |  |  |  |  | 100.00% | 100.00% | 100.00%
Revenues [Member] | United States [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage |  |  |  |  |  |  |  |  |  |  | 63.00% | 61.00% | 62.00%
Revenues [Member] | International [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage |  |  |  |  |  |  |  |  |  |  | 37.00% | 39.00% | 38.00%
Long-Lived Tangible Assets [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage |  |  |  |  |  |  |  |  |  |  | 100.00% | 100.00% | 100.00%
Long-Lived Tangible Assets [Member] | United States [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage |  |  |  |  |  |  |  |  |  |  | 78.00% | 76.00% | 83.00%
Long-Lived Tangible Assets [Member] | International [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage |  |  |  |  |  |  |  |  |  |  | 22.00% | 24.00% | 17.00%
[1] | The fourth quarter 2015 results were impacted by a bad debt reserve of $5.0 million on accounts receivable and a reserve of $2.9 million against foreign income tax assets.

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