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CONSOLIDATED STATEMENTS OF CHANGES IN PARTNERS' CAPITAL (USD $)
Total
USD ($)
Subtotal
Class A
USD ($)
Class B
USD ($)
General Partnership
USD ($)
Treasury Units
Balance at Dec. 31, 2009$ (21,332,823) $ (17,069,520)$ (4,050,138)$ (213,165) 
Balance (in units outstanding) at Dec. 31, 2009132,346     
Balance (in units issued) at Dec. 31, 2009 180,225144,18034,2431,80247,879
Increase (Decrease) in Partners' Capital      
Distribution to Partners(2,767,209) (2,213,767)(525,770)(27,672) 
Stock Buyback(540,911) (432,920)(102,591)(5,400) 
Stock Buyback (in units)(862)    862
Net Income (Loss)(1,378,896) (1,103,118)(261,990)(13,789) 
Balance at Sep. 30, 2010(26,019,840) (20,819,325)(4,940,489)(260,026) 
Balance (in units outstanding) at Sep. 30, 2010131,484     
Balance (in units issued) at Sep. 30, 2010 180,225144,18034,2431,80248,741
Balance at Dec. 31, 2010(26,920,567) (21,539,906)(5,111,628)(269,033) 
Balance (in units outstanding) at Dec. 31, 2010131,484     
Balance (in units issued) at Dec. 31, 2010 180,225144,18034,2431,80248,741
Increase (Decrease) in Partners' Capital      
Distribution to Partners(2,761,176) (2,208,941)(524,623)(27,612) 
Net Income (Loss)8,723,020 6,978,4161,657,37487,230 
Balance at Sep. 30, 2011$ (20,958,723) $ (16,770,431)$ (3,978,877)$ (209,415) 
Balance (in units outstanding) at Sep. 30, 2011131,484     
Balance (in units issued) at Sep. 30, 2011 180,225144,18034,2431,80248,741