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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, 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            
Distribution to Partners (986,134)   (788,907) (187,365) (9,862)  
Net Income 626,953   501,562 119,121 6,270  
Balance at Mar. 31, 2012 (21,670,033)   (17,339,479) (4,114,027) (216,527)  
Balance (in units) at Mar. 31, 2012 131,484 180,225 144,180 34,243 1,802 48,741
Balance at Dec. 31, 2012 (22,515,678)   (18,017,082) (4,273,666) (224,929)  
Balance (in units) at Dec. 31, 2012 130,444 180,225 144,180 34,243 1,802 49,781
Increase (Decrease) in Partners' Capital            
Distribution to Partners (975,298)   (780,238) (185,307) (9,753)  
Stock Buyback (399,487)   (321,240) (74,335) (3,912)  
Stock Buyback (in units) (404)         404
Net Income 901,625   721,299 171,309 9,016  
Balance at Mar. 31, 2013 $ (22,988,837)   $ (18,397,261) $ (4,361,999) $ (229,578)  
Balance (in units) at Mar. 31, 2013 130,040 180,225 144,180 34,243 1,802 50,185