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Financial Highlights
9 Months Ended
Sep. 30, 2011
General and Financial Highlights [Abstract] 
Financial Highlights
2.   Financial Highlights:
Changes in the net asset value per unit for the three and nine months ended September 30, 2011 and 2010 were as follows:
                                 
    Three Months Ended     Nine Months Ended  
    September 30,     September 30,  
    2011     2010     2011     2010  
Net realized and unrealized gains (losses) *
  $ (57.22 )   $ 22.50     $ (131.67 )   $ (23.57 )
Interest income
    0.03       0.27       0.27       0.64  
Expenses **
    (6.11 )     (9.60 )     (22.24 )     (26.07 )
 
                       
Increase (decrease) for the period
    (63.30 )     13.17       (153.64 )     (49.00 )
Net asset value per unit, beginning of period
    970.35       1,009.44       1,060.69       1,071.61  
 
                       
Net asset value per unit, end of period
  $ 907.05     $ 1,022.61     $ 907.05     $ 1,022.61  
 
                       
*   Includes Partnership brokerage fees and clearing fees allocated from the Master.
 
**   Excludes Partnership brokerage fees and clearing fees allocated from the Master.
                                 
    Three Months Ended     Nine Months Ended  
    September 30,     September 30,  
    2011     2010     2011     2010  
Ratios to average net assets:***
                               
Net investment income (loss) before allocation to Special Limited Partner****
    (7.7 )%     (8.6 )%     (8.1 )%     (8.2 )%
 
                       
Operating expenses
    7.7 %     8.7 %     8.2 %     8.3 %
Allocation to Special Limited Partner
    — %     — %     — %     — %
 
                       
Total expenses
    7.7 %     8.7 %     8.2 %     8.3 %
 
                       
 
                               
Total return:
                               
Total return before allocation to Special Limited Partner
    (6.5 )%     1.3 %     (14.5 )%     (4.6 )%
Allocation to Special Limited Partner
    — %     — %     — %     — %
                       
Total return after allocation to Special Limited Partner
    (6.5 )%     1.3 %     (14.5 )%     (4.6 )%
 
                       
***   Annualized (except for allocation to Special Limited Partner, if applicable).
 
****   Interest income allocated from the Master less total expenses.
The above ratios may vary for individual investors based on the timing of capital transactions during the period. Additionally, these ratios are calculated for the limited partner class using the limited partners’ share of income, expenses and average net assets.
Financial Highlights of the Master:
                                 
    Three Months Ended     Nine Months Ended  
    September 30,     September 30,  
    2011     2010     2011     2010  
Net realized and unrealized gains (losses) *
  $ (81.20 )   $ 54.65     $ (168.81 )   $ 19.86  
Interest income
    0.05       0.43       0.46       1.01  
Expenses **
    (0.25 )     (0.12 )     (0.64 )     (0.80 )
 
                       
Increase (decrease) for the period
    (81.40 )     54.96       (168.99 )     20.07  
Distribution of interest income to feeder funds
    (0.05 )     (0.43 )     (0.46 )     (1.01 )
Net asset value per unit, beginning of period
    1,667.09       1,604.94       1,755.09       1,640.41  
 
                       
Net asset value per unit, end of period
  $ 1,585.64     $ 1,659.47     $ 1,585.64     $ 1,659.47  
 
                       
*   Includes clearing fees.
 
**   Excludes clearing fees.
                                 
    Three Months Ended     Nine Months Ended  
    September 30,     September 30,  
    2011     2010     2011     2010  
Ratios to average net assets:***
                               
Net investment income (loss)****
    (0.6 )%     (0.2 )%     (0.5 )%     (0.3 )%
 
                       
Operating expenses
    0.6 %     0.3 %     0.5 %     0.3 %
 
                       
Total return
    (4.9 )%     3.4 %     (9.6 )%     1.2 %
 
                       
***   Annualized.
 
****   Interest income less total expenses.
The above ratios may vary for individual investors based on the timing of capital transactions during the period. Additionally, these ratios are calculated for the limited partner class using the limited partners’ share of income, expenses and average net assets.