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Net Income Per Limited Partner Unit - Reconciliation of Net Income and Weighted-Average Units Used in Computing Basic and Diluted Net Income Per Limited Partner Unit (Parenthetical) (Details) - shares
12 Months Ended
Dec. 31, 2020
Dec. 31, 2018
Earnings Per Share [Abstract]    
Antidilutive securities excluded from computation of earnings per share, amount 13,364 19,075