Capital Stock (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Feb. 28, 2017 |
Feb. 29, 2016 |
Feb. 28, 2017 |
Feb. 29, 2016 |
|
| Earnings Per Share [Abstract] | ||||
| Net earnings (loss) | $ 5,074 | $ (159,190) | $ 10,039 | $ (143,742) |
| Weighted average common shares outstanding - basic | 59,368 | 58,991 | 59,170 | 59,089 |
| Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities | 778 | 0 | 711 | 0 |
| Diluted | 60,146 | 58,991 | 59,881 | 59,089 |
| Basic | $ 0.09 | $ (2.70) | $ 0.17 | $ (2.43) |
| Diluted | $ 0.08 | $ (2.70) | $ 0.17 | $ (2.43) |
| Anti-dilutive securities from stock based compensation plans (excluded from earnings per share calculation) | 2,011 | 5,146 | 1,987 | 5,146 |
| X | ||||||||||
- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount after tax of income (loss) from continuing operations attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The amount of net income (loss) from continuing operations per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The amount of net income (loss) derived from continuing operations during the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of convertible debt securities using the if-converted method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|