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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, 2010 $ (26,920,567)   $ (21,539,906) $ (5,111,628) $ (269,033)  
Balance (in units) at Dec. 31, 2010 131,484 180,225 144,180 34,243 1,802 48,741
Increase (Decrease) in Partners' Capital            
Distributions to Partners (2,761,176)   (2,208,941) (524,623) (27,612)  
Net Income 8,722,708   6,978,166 1,657,315 87,227  
Balance at Sep. 30, 2011 (20,959,035)   (16,770,681) (3,978,936) (209,418)  
Balance (in units) at Sep. 30, 2011 131,484 180,225 144,180 34,243 1,802 48,741
Balance at Dec. 31, 2011 (21,310,852)   (17,052,134) (4,045,783) (212,935)  
Balance (in units) at Dec. 31, 2011 131,484 180,225 144,180 34,243 1,802 48,741
Increase (Decrease) in Partners' Capital            
Distributions to Partners (2,952,515)   (2,362,012) (560,978) (29,525)  
Stock Buyback (610,294)   (488,627) (115,584) (6,083)  
Stock Buyback (in units) (708)         708
Net Income 2,448,669   1,958,935 465,247 24,487  
Balance at Sep. 30, 2012 $ (22,424,993)   $ (17,943,838) $ (4,257,098) $ (224,057)  
Balance (in units) at Sep. 30, 2012 130,776 180,225 144,180 34,243 1,802 49,449