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Common Unit Repurchase and Retirement - Company's Repurchase Activities (Detail) - $ / shares shares in Thousands | 1 Months Ended | 3 Months Ended | 72 Months Ended
--- | --- | --- | ---
Apr. 30, 2019 | Mar. 31, 2019 | Feb. 28, 2019 | Jan. 31, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018
Repurchase Plan |  |  |  |  |  |  |  |  |
Capital Unit [Line Items] |  |  |  |  |  |  |  |  |
Total Number of Units Purchased |  |  | 197 | 1,474 |  | 516 | 2,187 | 599 | 7,937
Average Price Paid per Unit | [1] |  | $ 9.74 | $ 9.41 |  | $ 9.39 | $ 9.44 | $ 9.57 | $ 7.11
Maximum Number of Units that May Yet Be Purchased |  |  | 2,573 | 2,770 | [2] | 4,244 | 2,573 | 4,760 | 5,359
Repurchase Plan | Subsequent Event |  |  |  |  |  |  |  |  |
Capital Unit [Line Items] |  |  |  |  |  |  |  |  |
Total Number of Units Purchased |  | 222 |  |  |  |  |  |  |
Average Price Paid per Unit | [1] | $ 9.67 |  |  |  |  |  |  |
Maximum Number of Units that May Yet Be Purchased | [3] | 2,351 |  |  |  |  |  |  |
Publicly Announced Plans or Programs As Part of Repurchase Plan |  |  |  |  |  |  |  |  |
Capital Unit [Line Items] |  |  |  |  |  |  |  |  |
Total Number of Units Purchased |  |  | 197 | 1,474 |  | 516 | 2,187 | 599 | 5,493
Publicly Announced Plans or Programs As Part of Repurchase Plan | Subsequent Event |  |  |  |  |  |  |  |  |
Capital Unit [Line Items] |  |  |  |  |  |  |  |  |
Total Number of Units Purchased |  | 222 |  |  |  |  |  |  |
[1] | Amount includes repurchase costs.
[2] | February 2019 common units repurchased include 1.2 million common units acquired in a private transaction.
[3] | Of the total available for repurchase, approximately 1.1 million are available for repurchase in open market transactions and 1.3 million are available for repurchase in privately-negotiated transactions.

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