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Subsequent Events - Distribution Declaration (Details) - $ / shares
3 Months Ended
May 12, 2020
Feb. 12, 2020
Nov. 12, 2019
Aug. 13, 2019
May 14, 2019
Mar. 31, 2020
Mar. 31, 2019
Subsequent Event [Line Items]              
Distribution Made to Limited Partner, Distributions Paid, Per Unit   $ 0.885 $ 0.880 $ 0.850 $ 0.820    
Cash distributions per limited partner unit (in dollars per share)           $ 0.890 $ 0.820
Subsequent Event              
Subsequent Event [Line Items]              
Distribution Made to Limited Partner, Distributions Paid, Per Unit $ 0.890