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Partners' Capital and Distributions - Schedule of Distributions Declared and Paid (Detail) | 6 Months Ended
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Jun. 30, 2021 $ / shares
First Quarter 2020 |  |
Distribution Made To Limited Partner [Line Items] |  |
Record Date | May 04, 2020 |
Distribution Date | May 14, 2020 |
Distribution per Class A share | $ 0.4310 |
Second Quarter 2020 |  |
Distribution Made To Limited Partner [Line Items] |  |
Record Date | Aug. 06, 2020 |
Distribution Date | Aug. 14, 2020 |
Distribution per Class A share | $ 0.4363 |
Third Quarter 2020 |  |
Distribution Made To Limited Partner [Line Items] |  |
Record Date | Nov. 05, 2020 |
Distribution Date | Nov. 13, 2020 |
Distribution per Class A share | $ 0.4417 |
Fourth Quarter 2020 |  |
Distribution Made To Limited Partner [Line Items] |  |
Record Date | Feb. 04, 2021 |
Distribution Date | Feb. 12, 2021 |
Distribution per Class A share | $ 0.4471 |
First Quarter 2021 |  |
Distribution Made To Limited Partner [Line Items] |  |
Record Date | May 03, 2021 |
Distribution Date | May 13, 2021 |
Distribution per Class A share | $ 0.4526 |
Second Quarter 2021 |  |
Distribution Made To Limited Partner [Line Items] |  |
Record Date | Aug. 09, 2021 | [1]
Distribution Date | Aug. 13, 2021 | [1]
Distribution per Class A share | $ 0.5042 | [1]
[1] | For more information, see Note 14, Subsequent Events.

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