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Equity and Distributions, Distributions (Details) - $ / shares | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2019 | Dec. 31, 2018
Distributions to Partners [Abstract] |  |  |  |
Quarterly increase in cash distribution per unit (in dollars per unit) |  |  | $ 0.0025 |
Forecasted rate of annual increase of distributions per unit |  |  | 2.30% |
Quarterly percentage increase in distribution per unit | 2.30% |  |  |
Cash Distribution [Member] |  |  |  |
Distributions to Partners [Abstract] |  |  |  |
Distribution Per Common Unit (in dollars per unit) | $ 0.4425 | $ 0.4325 | $ 1.7650 | $ 1.7250

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