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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 3,600,000 46,200,000 950,000
Redemption of partnership shares (19,850,000) (23,150,000) (1,750,000)