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Condensed Statement of Changes in Partners' Capital - USD ($)
Total
General Partner [Member]
Limited Partners [Member]
Net income (loss) $ 16,489,055    
Net asset value, beginning of period at Dec. 31, 2015 $ 8.69    
Net asset value, end of period at Sep. 30, 2016 $ 8.33    
Balances at Dec. 31, 2016 $ 537,810,802 $ 0 $ 537,810,802
Addition of partnership shares 1,219,305,781 0 1,219,305,781
Redemption of partnership shares (1,081,074,804) 0 (1,081,074,804)
Net income (loss) (152,131,287) 0 (152,131,287)
Balances at Sep. 30, 2017 $ 523,910,492 $ 0 $ 523,910,492
Net asset value, beginning of period at Dec. 31, 2016 $ 9.29    
Net asset value, end of period at Sep. 30, 2017 $ 6.54