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Common Unit Repurchase Plans and Retirement - Company's Repurchase Activities (Detail) - $ / shares shares in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended | 131 Months Ended | 132 Months Ended
--- | --- | --- | --- | --- | ---
Nov. 30, 2024 | [2] | Oct. 31, 2024 | Sep. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2023 | Sep. 30, 2024 | May 31, 2023 | Sep. 30, 2023
Repurchase Plan |  |  |  |  |  |  |  |  |  |
Capital Unit [Line Items] |  |  |  |  |  |  |  |  |  |
Total Number of Units Purchased |  |  |  | 187 | 598 | 218 | 13 | 1,016 | 20,500 | 25,422
Average Price Paid per Unit | [1] |  |  | $ 11.02 | $ 10.86 | $ 10.92 | $ 11.27 | $ 10.91 |  | $ 8.82
Maximum Number of Units that May Yet Be Purchased |  |  |  | 1,552 | 1,739 | 2,337 | 2,555 | 1,552 |  | 2,568
Repurchase Plan | Subsequent Event |  |  |  |  |  |  |  |  |  |
Capital Unit [Line Items] |  |  |  |  |  |  |  |  |  |
Total Number of Units Purchased |  | 5 | 3 |  |  |  |  |  |  |
Average Price Paid per Unit | [1] | $ 11.12 | $ 11.25 |  |  |  |  |  |  |
Maximum Number of Units that May Yet Be Purchased |  | 1,544 | 1,549 |  |  |  |  |  |  |
Publicly Announced Plans or Programs As Part of Repurchase Plan |  |  |  |  |  |  |  |  |  |
Capital Unit [Line Items] |  |  |  |  |  |  |  |  |  |
Total Number of Units Purchased |  |  |  | 187 | 598 | 218 | 13 | 1,016 |  | 20,534
Publicly Announced Plans or Programs As Part of Repurchase Plan | Subsequent Event |  |  |  |  |  |  |  |  |  |
Capital Unit [Line Items] |  |  |  |  |  |  |  |  |  |
Total Number of Units Purchased |  | 5 | 3 |  |  |  |  |  |  |
[1] | Amounts include repurchase costs.
[2] | Of the total available for repurchase, approximately 1.2 million are available for repurchase in open market transactions and 0.3 million are available for repurchase in privately-negotiated transactions.

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