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Company's Repurchase Activities (Detail) - $ / shares shares in Thousands | 1 Months Ended | 3 Months Ended | 67 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jul. 31, 2018 | Jun. 30, 2018 | May 31, 2018 | Apr. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Jan. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017
Plan III Common Units Repurchase Program |  |  |  |  |  |  |  |  |  |  |
Capital Unit [Line Items] |  |  |  |  |  |  |  |  |  |  |
Maximum Number of Units that May Yet Be Purchased |  |  | 3,130 | 3,391 | 3,593 | 3,130 | 4,219 | [1] |  | 2,207 | 2,207
Total Number of Units Purchased |  |  | 261 | 202 | 626 | 1,089 | 1,281 |  | 2,700 |  |
Average Price Paid per Unit | [2] |  | $ 9.56 | $ 9.64 | $ 9.71 | $ 9.66 | $ 9.38 |  |  |  |
Plan III Common Units Repurchase Program | Subsequent Event |  |  |  |  |  |  |  |  |  |  |
Capital Unit [Line Items] |  |  |  |  |  |  |  |  |  |  |
Maximum Number of Units that May Yet Be Purchased | [3],[4] | 3,005 |  |  |  |  |  |  |  |  |
Total Number of Units Purchased | [4] | 125 |  |  |  |  |  |  |  |  |
Average Price Paid per Unit | [2],[4] | $ 9.72 |  |  |  |  |  |  |  |  |
Publicly Announced Plans or Programs As Part of Plan III Common Units Repurchase Program |  |  |  |  |  |  |  |  |  |  |
Capital Unit [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total Number of Units Purchased |  |  | 261 | 202 | 626 | 1,089 | 1,281 |  |  |  |
Publicly Announced Plans or Programs As Part of Plan III Common Units Repurchase Program | Subsequent Event |  |  |  |  |  |  |  |  |  |  |
Capital Unit [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total Number of Units Purchased | [4] | 125 |  |  |  |  |  |  |  |  |
[1] | In February 2018, the Board authorized an increase in the number of Common Units available for repurchase from 2.2 million to 5.5 million.
[2] | Amount includes repurchase costs.
[3] | Of the total available for repurchase, $0.5 million are available for repurchase in open market transactions and $2.5 million are available for repurchase in privately-negotiated transactions.
[4] | See Note 14 - Subsequent Events.

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