Reporting Segments and Related Information - Reconciliation of Revenues, Segment Profits (Losses) and Net Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues
Equity in unconsolidated joint ventures, net	$ 9,202	$ 4,504	$ 16,575
Gain on sale of real estate	0	1,331	0
Investment income	57	884	1,239
Total revenues and other income	64,872	44,549	67,337
Segment Profits (Losses)
Gain on sale of real estate	0	1,331	0
Other income (loss)	164	110	(1,824)
Corporate expenses	(55,873)	(44,577)	(50,954)
Income before income taxes	9,163	82	14,559
Operating Segments
Revenues
Revenues	55,613	37,830	49,523
Segment Profits (Losses)
Segment profits	9,583	2,683	7,930
Operating Segments | Real estate - commercial/industrial
Revenues
Revenues	19,476	9,536	16,792
Equity in unconsolidated joint ventures, net	9,202	4,504	16,575
Segment Profits (Losses)
Segment profits	7,523	2,414	3,831
Corporate expenses	(11,953)	(7,122)	(12,961)
Operating Segments | Real estate - resort/residential
Segment Profits (Losses)
Segment profits	(1,723)	(1,612)	(2,247)
Corporate expenses	(1,723)	(1,612)	(2,247)
Operating Segments | Mineral resources
Revenues
Revenues	20,987	10,736	9,791
Segment Profits (Losses)
Segment profits	7,428	4,322	3,973
Corporate expenses	(13,559)	(6,414)	(5,818)
Operating Segments | Farming
Revenues
Revenues	11,039	13,866	19,331
Segment Profits (Losses)
Segment profits	(3,077)	(1,237)	4,080
Corporate expenses	(14,116)	(15,103)	(15,251)
Operating Segments | Ranch operations
Revenues
Revenues	4,111	3,692	3,609
Segment Profits (Losses)
Segment profits	(568)	(1,204)	(1,707)
Corporate expenses	(4,679)	(4,896)	(5,316)
Corporate expenses
Segment Profits (Losses)
Corporate expenses	$ (9,843)	$ (9,430)	$ (9,361)