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Partnership's Repurchase Activities (Parenthetical) (Detail) In Thousands, unless otherwise specified | Jun. 30, 2014 | Sep. 30, 2013
--- | --- | ---
Capital Unit [Line Items] |  |  |
Partnership's common units authorized for repurchase | 6,044 |  |
Private Transaction |  |  |
Capital Unit [Line Items] |  |  |
Partnership's common units authorized for repurchase | 1,150 | [1] | 1,150
[1] | Fiscal year 2013 common unit repurchases include 1.15 million common units acquired in a private transaction.

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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
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- Definition The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant