CONSOLIDATED STATEMENTS OF CHANGES IN PARTNERS' CAPITAL - USD ($)	Subtotal	General Partnership	Treasury Units	Class A	Class B	Total
Balance at Dec. 31, 2014		$ (272,859)		$ (21,910,488)	$ (5,184,335)	$ (27,367,682)
Balance (in units) at Dec. 31, 2014	180,225	1,802	52,572	144,180	34,243	127,653
Increase (Decrease) in Partners' Capital
Distribution to Partners		$ (37,859)		$ (3,028,706)	$ (719,318)	$ (3,785,883)
Stock Buyback		(33,878)		(2,752,393)	(643,682)	$ (3,429,953)
Stock Buyback (in units)			(2,279)			(2,279)
Net income		37,726		3,018,052	716,787	$ 3,772,565
Balance at Dec. 31, 2015		$ (306,870)		$ (24,673,535)	$ (5,830,548)	$ (30,810,953)
Balance (in units) at Dec. 31, 2015	180,225	1,802	54,851	144,180	34,243	125,374
Increase (Decrease) in Partners' Capital
Distribution to Partners		$ (67,297)		$ (5,383,743)	$ (1,278,639)	$ (6,729,679)
Stock Buyback		(16,181)		(1,311,328)	(307,436)	$ (1,634,945)
Stock Buyback (in units)			(965)			(965)
Net income		49,508		3,960,682	940,662	$ 4,950,852
Balance at Dec. 31, 2016		$ (340,840)		$ (27,407,924)	$ (6,475,961)	$ (34,224,726)
Balance (in units) at Dec. 31, 2016	180,225	1,802	55,816	144,180	34,243	124,409
Increase (Decrease) in Partners' Capital
Gain (Loss) on Disposition of Oil and Gas and Timber Property						$ 104,443
Distribution to Partners		$ (79,858)		$ (6,388,668)	$ (1,517,309)	(7,985,835)
Stock Buyback		(426)		(34,038)	(8,084)	$ (42,548)
Stock Buyback (in units)			(23)			(23)
Net income		69,379		5,550,345	1,318,207	$ 6,937,931
Balance at Dec. 31, 2017		$ (351,745)		$ (28,280,285)	$ (6,683,147)	$ (35,315,177)
Balance (in units) at Dec. 31, 2017	180,225	1,802	55,839	144,180	34,243	124,386