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Earnings Per Limited Partner Unit (Tables) | 6 Months Ended
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Mar. 31, 2015
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:
|  | Three Months Ended |  |  | Six Months Ended |
Basic and Diluted Earnings Per Limited Partner: |  | March 31, |  |  | March 31, |
(in thousands, except per unit data) |  | 2015 |  |  | 2014 |  |  | 2015 |  |  | 2014 |
Net income |  | $ | 75,687 |  |  | $ | 52,216 |  |  | $ | 91,241 |  |  | $ | 71,504 |
Less General Partner’s interest in net income |  |  | 428 |  |  |  | 294 |  |  |  | 516 |  |  |  | 403 |
Net income available to limited partners |  |  | 75,259 |  |  |  | 51,922 |  |  |  | 90,725 |  |  |  | 71,101 |
Less dilutive impact of theoretical distribution of earnings under FASB ASC 260-10-45-60 |  |  | 13,616 |  |  |  | 9,065 |  |  |  | 15,705 |  |  |  | 11,922 |
Limited Partner’s interest in net income under FASB ASC 260-10-45-60 |  | $ | 61,643 |  |  | $ | 42,857 |  |  | $ | 75,020 |  |  | $ | 59,179 |
Per unit data: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic and diluted net income available to limited partners |  | $ | 1.31 |  |  | $ | 0.90 |  |  | $ | 1.58 |  |  | $ | 1.24 |
Less dilutive impact of theoretical distribution of earnings under FASB ASC 260-10-45-60 |  |  | 0.23 |  |  |  | 0.15 |  |  |  | 0.27 |  |  |  | 0.21 |
Limited Partner’s interest in net income under FASB ASC 260-10-45-60 |  | $ | 1.08 |  |  | $ | 0.75 |  |  | $ | 1.31 |  |  | $ | 1.03 |
Weighted average number of Limited Partner units outstanding |  |  | 57,282 |  |  |  | 57,468 |  |  |  | 57,288 |  |  |  | 57,490 |

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