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CONSOLIDATED STATEMENTS OF CHANGES IN PARTNERS' CAPITAL - USD ($) | Subtotal | Limited Partner Treasury Units Class B | Limited Partner Class A | Limited Partner Class B | General Partnership Treasury Units | General Partnership | Treasury Units | Total
--- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2012 |  |  | $ (18,017,082) | $ (4,273,666) |  | $ (224,929) |  | $ (22,515,677)
Balance (in units) at Dec. 31, 2012 | 180,225 |  | 144,180 | 34,243 |  | 1,802 | 49,781 | 130,444
Increase (Decrease) in Partners' Capital |  |  |  |  |  |  |  |
Distribution to Partners |  |  | $ (3,114,930) | $ (739,796) |  | $ (38,936) |  | $ (3,893,662)
Stock Buyback |  |  | (877,623) | (206,137) |  | (10,849) |  | $ (1,094,609)
Stock Buyback (in units) |  |  |  |  |  |  | 957 | (957)
Net income |  |  | 4,524,308 | 1,074,523 |  | 56,554 |  | $ 5,655,385
Balance at Dec. 31, 2013 |  |  | $ (17,485,327) | $ (4,145,076) |  | $ (218,160) |  | $ (21,848,563)
Balance (in units) at Dec. 31, 2013 | 180,225 |  | 144,180 | 34,243 |  | 1,802 | 50,738 | 129,487
Increase (Decrease) in Partners' Capital |  |  |  |  |  |  |  |
Distribution to Partners |  |  | $ (3,086,709) | $ (733,093) |  | $ (38,584) |  | $ (3,858,386)
Stock Buyback |  |  | (2,158,332) | (500,888) |  | (26,363) |  | $ (2,685,583)
Stock Buyback (in units) |  | 349 |  |  | 18 |  | 1,834 | (1,834)
Net income |  |  | 819,880 | 194,722 |  | 10,248 |  | $ 1,024,850
Balance at Dec. 31, 2014 |  |  | $ (21,910,488) | $ (5,184,335) |  | $ (272,859) |  | $ (27,367,682)
Balance (in units) at Dec. 31, 2014 | 180,225 |  | 144,180 | 34,243 |  | 1,802 | 52,572 | 127,653
Increase (Decrease) in Partners' Capital |  |  |  |  |  |  |  |
Distribution to Partners |  |  | $ (3,028,706) | $ (719,318) |  | $ (37,859) |  | $ (3,785,883)
Stock Buyback |  |  | (2,752,393) | (643,682) |  | (33,878) |  | $ (3,429,953)
Stock Buyback (in units) |  | 433 |  |  | 23 |  | 2,279 | (2,279)
Net income |  |  | 3,018,052 | 716,787 |  | 37,726 |  | $ 3,772,565
Balance at Dec. 31, 2015 |  |  | $ (24,673,535) | $ (5,830,548) |  | $ (306,870) |  | $ (30,810,953)
Balance (in units) at Dec. 31, 2015 | 180,225 |  | 144,180 | 34,243 |  | 1,802 | 54,851 | 125,374

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