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Net Earnings Per Share (Tables) | 9 Months Ended
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May 31, 2014
Net Earnings Per Share [Abstract] |
Schedule Of Computation Of Basic And Diluted Net Earnings Per Share |
|  | Three months ended |  | Nine months ended
|  | May 31, |  | May 31, |  | May 31, |  | May 31,
($ and shares in thousands, except per share amounts) |  | 2014 |  | 2013 |  | 2014 |  | 2013
Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net earnings |  | $ | 16,499 |  | $ | 26,063 |  | $ | 40,183 |  | $ | 60,142
Denominator: |  |  |  |  |  |  |  |  |  |  |  |
Weighted average shares outstanding |  |  | 12,843 |  |  | 12,858 |  |  | 12,881 |  |  | 12,819
Diluted effect of stock equivalents |  |  | 46 |  |  | 89 |  |  | 46 |  |  | 75
Weighted average shares outstanding assuming dilution |  |  | 12,889 |  |  | 12,947 |  |  | 12,927 |  |  | 12,894
Basic net earnings per share |  | $ | 1.28 |  | $ | 2.03 |  | $ | 3.12 |  | $ | 4.69
Diluted net earnings per share |  | $ | 1.28 |  | $ | 2.01 |  | $ | 3.11 |  | $ | 4.66
Schedule Of Anti-Dilutive Securities Excluded From Computation Of Earnings Per Share |
|  | Three months ended |  | Nine months ended
|  | May 31, |  | May 31,
Units and options in thousands |  | 2014 |  | 2013 |  | 2014 |  | 2013
Restricted stock units |  | - |  | - |  | 4 |  | 4
Stock options |  | 47 |  | 23 |  | 43 |  | 30
Performance stock units |  | 13 |  | 12 |  | 13 |  | 12

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- Definition Schedule Of Anti-Dilutive Securities Excluded From Computation Of Earnings Per Share [Table Text Block]. + References No definition available. + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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