Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Timber and roads, accumulated depletion	$ 84,809	$ 82,094
Buildings and equipment, accumulated depreciation	$ 6,139	$ 6,012
General partners' capital, units issued	60	60
General partners' capital, units outstanding	60	60
Limited partners' capital, units issued	4,308	4,299
Limited partners' capital, units outstanding	4,308	4,299