Statements of Changes in Partners' Capital (USD $)
Total
Limited Partners
General Partner
Begining Balances at Dec. 31, 2010 $ 67,294,584 $ 67,294,584 $ 0
Net asset value, beginning of year at Dec. 31, 2010 $ 42.06    
Addition of partnership units 350,000 in 2012, 1,550,000 in 2011 and 1,900,000 in 2010 90,155,234 90,155,234   
Redemption of partnership units 500,000 in 2012, 2,050,000 in 2011 and 1,900,000 in 2010 (94,034,712) (94,034,712) 0
Net income 13,971,992 13,971,992 0
Ending Balances at Dec. 31, 2011 77,387,098 77,387,098 0
Net asset value, end of year at Dec. 31, 2011 $ 48.37    
Addition of partnership units 350,000 in 2012, 1,550,000 in 2011 and 1,900,000 in 2010 87,043,567 87,043,567 0
Redemption of partnership units 500,000 in 2012, 2,050,000 in 2011 and 1,900,000 in 2010 (114,382,329) (114,382,329) 0
Net income 14,177,152 14,177,152 0
Ending Balances at Dec. 31, 2012 64,225,488 64,225,488 0
Net asset value, end of year at Dec. 31, 2012 $ 58.39    
Addition of partnership units 350,000 in 2012, 1,550,000 in 2011 and 1,900,000 in 2010 19,597,900 19,597,900 0
Redemption of partnership units 500,000 in 2012, 2,050,000 in 2011 and 1,900,000 in 2010 (29,886,964) (29,886,964) 0
Net income 2,960,747 2,960,747 0
Ending Balances at Dec. 31, 2013 $ 56,897,171 $ 56,897,171 $ 0
Net asset value, end of year at Dec. 31, 2013 $ 59.89