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Statement of Changes in Partners' Capital (Parenthetical) - shares
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Statement of Changes in Partners' Capital      
Addition of partnership shares 50,000 28,750,000 100,000
Redemption of partnership unit shares (6,500,000) (19,750,000) (550,000)