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Public Offerings (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 9 Months Ended |  |  | 0 Months Ended
--- | --- | --- | --- | ---
Jun. 29, 2013 | Jun. 23, 2012 | Aug. 06, 2013 Senior Note Due 2021 [Member] | Aug. 02, 2013 Senior Note Due 2021 [Member] | May 17, 2013 Public Offering [Member] | May 22, 2013 Over Allotment Option [Member]
Sale of Partnership Units [Line Items] |  |  |  |  |  |
Number of common units sold (in units) |  |  |  |  | 2,700 | 405
Price per common unit sold in a public offering (in dollars per unit) |  |  |  |  | $ 48.16 | $ 48.16
Proceeds received from public offering, net | $ 143,444 | $ 0 |  |  | $ 124,684 | $ 18,760
Repayments of borrowings |  |  | $ 23,900 | $ 133,400 |  |

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