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Partnership's Repurchase Activities (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2013 | May 31, 2013 | Apr. 30, 2013 | Mar. 31, 2013 | Jan. 31, 2013 | Dec. 31, 2012 | Nov. 30, 2012 | Oct. 31, 2012 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Jun. 30, 2013 | Sep. 30, 2012 | Feb. 28, 2013 | Jul. 31, 2012
Capital Unit [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Units that May Yet Be Purchased Under the Program |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,000 |
Partnership's common units authorized for repurchase in a private transaction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,150 | [1]
Maximum Number of Units that May Yet Be Purchased Under the Program |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,150 |
Total Number of Units Purchased as Part of a Publicly Announced Plan or Program | 1,308 | [1] | 228 |  | 161 |  | 219 |  | 91 |  | 331 |  | 645 |  | 39 |  | 1,697 |  | 310 |  | 1,015 |  | 3,022 |  | 22 |  |  |  |
Average Price Paid per Unit | $ 4.95 | [1],[2] | $ 4.88 | [2] | $ 4.74 | [2] | $ 4.40 | [2] | $ 4.25 | [2] | $ 4.13 | [2] | $ 4.20 | [2] | $ 4.28 | [2] | $ 4.92 | [2] | $ 4.36 | [2] | $ 4.18 | [2] | $ 4.61 | [2] | $ 4.26 | [2] |  |  |
Maximum Number of Units that May Yet Be Purchased Under the Program | 1,106 | [1] | 2,414 |  | 2,642 |  | 2,803 |  | 3,022 |  | 3,113 |  | 3,444 |  | 4,089 |  | 1,106 | [1] | 2,803 |  | 3,113 |  | 1,106 | [1] | 4,128 |  | 3,022 |  |
[1] | June 2013 common unit repurchases include 1.15 million common units acquired in a private transaction.
[2] | Amounts include repurchase costs.

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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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