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Public Offerings - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
May. 22, 2013 | May. 17, 2013 | Sep. 26, 2015 | Sep. 27, 2014 | Sep. 28, 2013 | Aug. 06, 2013 | Aug. 02, 2013
Sale of Partnership Units [Line Items] |  |  |  |  |  |  |
Number of common units sold (in units) |  | 2,700,000 |  |  |  |  |
Price per common unit sold in a public offering (in dollars per unit) |  | $ 48.16 |  |  |  |  |
Proceeds received from public offering, net |  |  | $ 0 | $ 0 | $ 143,444 |  |
Public Offering [Member] |  |  |  |  |  |  |
Sale of Partnership Units [Line Items] |  |  |  |  |  |  |
Proceeds received from public offering, net |  | $ 124,684 |  |  |  |  |
Over Allotment Option [Member] |  |  |  |  |  |  |
Sale of Partnership Units [Line Items] |  |  |  |  |  |  |
Number of common units sold (in units) | 405,000 |  |  |  |  |  |
Price per common unit sold in a public offering (in dollars per unit) | $ 48.16 |  |  |  |  |  |
Proceeds received from public offering, net | $ 18,760 |  |  |  |  |  |
Senior Note Due 2021 [Member] |  |  |  |  |  |  |
Sale of Partnership Units [Line Items] |  |  |  |  |  |  |
Repayments of borrowings |  |  |  |  |  | $ 23,863 | $ 133,400

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