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Quarterly Results Of Operations (Tables) | 12 Months Ended
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Aug. 31, 2012
Quarterly Results Of Operations [Abstract] |
Schedule of Quarterly Results |
|  | First |  | Second |  | Third |  | Fourth
$ in thousands, except per share amounts |  | Quarter |  | Quarter |  | Quarter |  | Quarter
Year ended August 31, 2012 |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  | $ | 119,205 |  | $ | 132,134 |  | $ | 172,099 |  | $ | 127,817
Cost of operating revenues |  |  | 88,957 |  |  | 95,640 |  |  | 123,071 |  |  | 95,069
Earnings before income taxes |  |  | 4,441 |  |  | 19,427 |  |  | 28,587 |  |  | 12,653
Net earnings |  |  | 2,921 |  |  | 12,774 |  |  | 18,823 |  |  | 8,759
Diluted net earnings per share(1) |  | $ | 0.23 |  | $ | 1.00 |  | $ | 1.47 |  | $ | 0.68
Market price (NYSE) |  |  |  |  |  |  |  |  |  |  |  |
High |  | $ | 63.40 |  | $ | 67.27 |  | $ | 70.13 |  | $ | 74.62
Low |  | $ | 46.03 |  | $ | 49.17 |  | $ | 52.98 |  | $ | 52.68
Year ended August 31, 2011 |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  | $ | 89,166 |  | $ | 120,168 |  | $ | 153,446 |  | $ | 116,110
Cost of operating revenues |  |  | 64,943 |  |  | 86,159 |  |  | 111,947 |  |  | 86,056
Earnings before income taxes |  |  | 6,577 |  |  | 17,001 |  |  | 23,159 |  |  | 9,777
Net earnings |  |  | 4,286 |  |  | 11,325 |  |  | 15,289 |  |  | 5,902
Diluted net earnings per share(1) |  | $ | 0.34 |  | $ | 0.89 |  | $ | 1.20 |  | $ | 0.46
Market price (NYSE) |  |  |  |  |  |  |  |  |  |  |  |
High |  | $ | 66.48 |  | $ | 79.56 |  | $ | 85.87 |  | $ | 73.03
Low |  | $ | 37.22 |  | $ | 58.00 |  | $ | 61.85 |  | $ | 47.68
(1) The quarterly diluted net earnings per share is calculated based on the weighted average shares outstanding assuming dilution for the quarter. There may be rounding differences between the sum of the quarterly diluted net earnings per share amounts and the year-to-date diluted net earnings per share.

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- Definition Tabular disclosure of the quarterly financial data in the annual financial statements. The disclosure includes financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=20225539&loc=d3e1280-108306 + Details
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