Segment Information - Information by Business Segment (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segments
Revenues		$ 42,660	$ 32,856	$ 35,546	$ 16,023	$ 16,301	$ 23,676	$ 50,434	$ 19,865	$ 127,085	$ 110,276	$ 100,038
Cost of revenue										64,086	51,317	67,194
Other operating and corporate expenses										21,389	20,557	20,382
Depreciation, depletion and amortization										10,287	8,998	8,885
Investment income, net										10,714	12,150	35,410
Interest expense										12,302	11,840	12,145
Sale of vacation rental management, net												9,800
Income before equity in loss from unconsolidated affiliates and income taxes										36,185	30,866	41,355
Equity in loss from unconsolidated affiliates										(77)
Capital expenditures										114,286	45,196	39,880
Total assets		909,233				870,962				909,233	870,962
Interest income from investments in SPEs										8,190	8,197	8,201
Interest expense from Senior Notes issued by SPE										(8,801)	(8,788)	(8,777)
PCR Rentals Sale | Disposed of by Sale
Segments
Sale of vacation rental management, net	$ 9,800
Mattamy - RiverTown sale
Segments
Revenues								$ 23,100
Residential real estate
Segments
Equity in loss from unconsolidated affiliates										(71)
Hospitality | PCR Rentals Sale | Disposed of by Sale
Segments
Sale of vacation rental management, net												9,800
Commercial leasing and sales
Segments
Equity in loss from unconsolidated affiliates										(6)
Operating Segments | Residential real estate
Segments
Revenues										41,586	43,266	22,248
Cost of revenue										20,492	10,215	12,971
Other operating and corporate expenses										4,873	4,717	4,329
Depreciation, depletion and amortization										283	288	363
Interest expense										717	867	1,164
Income before equity in loss from unconsolidated affiliates and income taxes										15,144	26,919	3,683
Capital expenditures										28,639	15,865	8,407
Total assets		139,349				127,999				139,349	127,999
Operating Segments | Residential real estate | Mattamy - RiverTown sale | Real estate - Impact fees
Segments
Revenues											23,100
Operating Segments | Hospitality
Segments
Revenues										45,720	39,576	54,319
Cost of revenue										33,924	33,385	47,300
Other operating and corporate expenses										838	533	462
Depreciation, depletion and amortization										4,579	3,640	4,049
Sale of vacation rental management, net												9,800
Income before equity in loss from unconsolidated affiliates and income taxes										6,574	1,817	12,664
Capital expenditures										15,923	7,400	4,918
Total assets		89,570				68,389				89,570	68,389
Operating Segments | Commercial leasing and sales
Segments
Revenues										22,458	16,485	14,510
Cost of revenue										8,549	6,397	5,979
Other operating and corporate expenses										3,052	3,183	3,444
Depreciation, depletion and amortization										4,939	4,411	3,729
Interest expense										2,739	2,180	2,200
Income before equity in loss from unconsolidated affiliates and income taxes										6,632	(121)	(836)
Capital expenditures										67,254	20,483	25,248
Total assets		232,715				182,658				232,715	182,658
Operating Segments | Forestry
Segments
Revenues										16,365	8,135	8,443
Cost of revenue										1,044	1,097	903
Other operating and corporate expenses										427	384	396
Depreciation, depletion and amortization										314	514	575
Income before equity in loss from unconsolidated affiliates and income taxes										14,607	6,222	6,586
Capital expenditures										1,965	1,069	1,100
Total assets		21,221				20,189				21,221	20,189
Operating Segments | Residential real estate and other
Segments
Investment income, net										184	320	89
Other
Segments
Revenues										956	2,814	518
Cost of revenue										77	223	41
Other operating and corporate expenses										12,199	11,740	11,751
Depreciation, depletion and amortization										172	145	169
Interest expense										8,846	8,793	8,781
Income before equity in loss from unconsolidated affiliates and income taxes										(6,772)	(3,971)	19,258
Capital expenditures										505	379	207
Total assets		$ 426,378				$ 471,727				426,378	471,727
Interest expense from Senior Notes issued by SPE										(8,800)	(8,800)	(8,800)
Other | Mitigation bank credit
Segments
Revenues											2,200
Corporate
Segments
Investment income, net										10,530	11,830	35,321
Interest income from investments in SPEs										$ 8,200	$ 8,200	$ 8,200