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