Segment Information - Information by Business Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Segments
Revenues	$ 32,856	$ 23,676	$ 84,426	$ 93,974
Consolidated income (loss) before income taxes	8,829	1,861	25,132	34,850
Total assets	898,026		898,026		$ 870,962
Operating Segments | Residential real estate
Segments
Revenues	10,963	1,959	28,150	37,749
Consolidated income (loss) before income taxes	4,102	(368)	9,910	26,048
Total assets	136,469		136,469		125,642
Operating Segments | Residential real estate | Real estate - Impact fees | Mattamy - RiverTown sale
Segments
Revenues				23,100
Operating Segments | Hospitality
Segments
Revenues	14,042	12,565	37,107	33,285
Consolidated income (loss) before income taxes	2,779	1,747	7,285	3,615
Total assets	84,877		84,877		70,746
Operating Segments | Commercial leasing and sales
Segments
Revenues	5,942	6,225	13,694	12,720
Consolidated income (loss) before income taxes	3,291	609	5,610	329
Total assets	222,692		222,692		182,658
Operating Segments | Forestry
Segments
Revenues	1,574	2,627	4,582	7,415
Consolidated income (loss) before income taxes	1,168	2,072	3,473	5,830
Total assets	20,842		20,842		20,189
Other
Segments
Revenues	335	300	893	2,805
Consolidated income (loss) before income taxes	(2,511)	$ (2,199)	(1,146)	(972)
Total assets	$ 433,146		$ 433,146		$ 471,727
Other | Mitigation bank credit
Segments
Revenues				$ 2,200