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Earnings (Loss) Per Limited Partner Unit (Tables) | 9 Months Ended
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Jun. 30, 2013
Net Income Allocation and Per Unit Data | The following presents the net income allocation and per unit data using this method for the periods presented:
Basic and Diluted Earnings Per Limited Partner: (in thousands, except per unit data) |  | Three Months Ended June 30, |  |  | Nine Months Ended June 30, |
| 2013 |  |  | 2012 |  |  | 2013 |  |  | 2012 |
Net income (loss) |  | $ | (7,588 | ) |  | $ | (11,789 | ) |  | $ | 43,843 |  |  | $ | 31,624 |
Less General Partners’ interest in net income (loss) |  |  | (41 | ) |  |  | (62 | ) |  |  | 237 |  |  |  | 166 |
Net income (loss) available to limited partners |  |  | (7,547 | ) |  |  | (11,727 | ) |  |  | 43,606 |  |  |  | 31,458 |
Less dilutive impact of theoretical distribution of earnings under FASB ASC 260-10-45-60 |  |  | — |  |  |  | — |  |  |  | 5,623 |  |  |  | 3,141 |
Limited Partner’s interest in net income (loss) under FASB ASC 260-10-45-60 |  | $ | (7,547 | ) |  | $ | (11,727 | ) |  | $ | 37,983 |  |  | $ | 28,317 |
Per unit data: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic and diluted net income (loss) available to limited partners |  | $ | (0.13 | ) |  | $ | (0.19 | ) |  | $ | 0.73 |  |  | $ | 0.51 |
Less dilutive impact of theoretical distribution of earnings under FASB ASC 260-10-45-60 |  |  | — |  |  |  | — |  |  |  | 0.10 |  |  |  | 0.05 |
Limited Partner’s interest in net income (loss) under FASB ASC 260-10-45-60 |  | $ | (0.13 | ) |  | $ | (0.19 | ) |  | $ | 0.63 |  |  | $ | 0.46 |
Weighted average number of Limited Partner units outstanding |  |  | 59,370 |  |  |  | 61,024 |  |  |  | 59,918 |  |  |  | 62,236 |

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- Definition Net income per unit data. + References No definition available. + Details
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