Schedule III (Consolidated) - Real Estate and Accumulated Depreciation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Schedule III, Real Estate
Encumbrances	$ 92,529
Initial Cost to Company, Land & Improvements	161,211
Initial Cost to Company, Buildings & Improvements	173,982
Costs Capitalized Subsequent to Acquisition or Construction	169,839
Land & Land Improvements	330,320
Buildings and Improvements	174,712
Total	505,032	$ 418,494	$ 404,376	$ 381,969
Accumulated Depreciation	74,256
Aggregate cost of real estate owned for federal income tax purposes	503,800
Residential developments
Schedule III, Real Estate
Encumbrances	2,362
Initial Cost to Company, Land & Improvements	45,445
Initial Cost to Company, Buildings & Improvements	13,595
Costs Capitalized Subsequent to Acquisition or Construction	68,329
Land & Land Improvements	121,268
Buildings and Improvements	6,101
Total	127,369
Accumulated Depreciation	$ 4,542
Depreciation Life (in years)	25 years
Residential developments | Minimum
Schedule III, Real Estate
Depreciation Life (in years)	5 years
WaterColor Inn
Schedule III, Real Estate
Initial Cost to Company, Land & Improvements	$ 2,362
Initial Cost to Company, Buildings & Improvements	15,149
Costs Capitalized Subsequent to Acquisition or Construction	9,303
Land & Land Improvements	2,832
Buildings and Improvements	23,982
Total	26,814
Accumulated Depreciation	$ 10,409
WaterColor Inn | Minimum
Schedule III, Real Estate
Depreciation Life (in years)	10 years
WaterColor Inn | Maximum
Schedule III, Real Estate
Depreciation Life (in years)	40 years
Pier Park Hospitality
Schedule III, Real Estate
Encumbrances	$ 2,637
Costs Capitalized Subsequent to Acquisition or Construction	7,139
Land & Land Improvements	7,139
Total	7,139
Clubs and golf courses
Schedule III, Real Estate
Initial Cost to Company, Land & Improvements	34,608
Initial Cost to Company, Buildings & Improvements	20,132
Costs Capitalized Subsequent to Acquisition or Construction	3,799
Land & Land Improvements	39,638
Buildings and Improvements	18,901
Total	58,539
Accumulated Depreciation	$ 22,031
Clubs and golf courses | Minimum
Schedule III, Real Estate
Depreciation Life (in years)	10 years
Clubs and golf courses | Maximum
Schedule III, Real Estate
Depreciation Life (in years)	25 years
Marinas
Schedule III, Real Estate
Initial Cost to Company, Land & Improvements	$ 5,350
Initial Cost to Company, Buildings & Improvements	2,652
Costs Capitalized Subsequent to Acquisition or Construction	443
Land & Land Improvements	5,784
Buildings and Improvements	2,661
Total	8,445
Accumulated Depreciation	$ 1,651
Marinas | Minimum
Schedule III, Real Estate
Depreciation Life (in years)	10 years
Marinas | Maximum
Schedule III, Real Estate
Depreciation Life (in years)	25 years
Other Hospitality
Schedule III, Real Estate
Encumbrances	$ 1,574
Initial Cost to Company, Buildings & Improvements	5,470
Costs Capitalized Subsequent to Acquisition or Construction	660
Land & Land Improvements	572
Buildings and Improvements	5,558
Total	6,130
Accumulated Depreciation	$ 2,131
Other Hospitality | Minimum
Schedule III, Real Estate
Depreciation Life (in years)	10 years
Other Hospitality | Maximum
Schedule III, Real Estate
Depreciation Life (in years)	30 years
Pier Park North JV
Schedule III, Real Estate
Encumbrances	$ 45,134
Initial Cost to Company, Land & Improvements	13,711
Initial Cost to Company, Buildings & Improvements	35,243
Costs Capitalized Subsequent to Acquisition or Construction	3,115
Land & Land Improvements	13,711
Buildings and Improvements	38,358
Total	52,069
Accumulated Depreciation	$ 9,364
Pier Park North JV | Minimum
Schedule III, Real Estate
Depreciation Life (in years)	15 years
Pier Park North JV | Maximum
Schedule III, Real Estate
Depreciation Life (in years)	39 years
Town centers
Schedule III, Real Estate
Initial Cost to Company, Land & Improvements	$ 713
Initial Cost to Company, Buildings & Improvements	21,887
Costs Capitalized Subsequent to Acquisition or Construction	(2,136)
Land & Land Improvements	789
Buildings and Improvements	19,675
Total	20,464
Accumulated Depreciation	$ 15,974
Town centers | Minimum
Schedule III, Real Estate
Depreciation Life (in years)	10 years
Town centers | Maximum
Schedule III, Real Estate
Depreciation Life (in years)	25 years
VentureCrossings
Schedule III, Real Estate
Initial Cost to Company, Land & Improvements	$ 5,792
Initial Cost to Company, Buildings & Improvements	24,490
Costs Capitalized Subsequent to Acquisition or Construction	3,486
Land & Land Improvements	9,828
Buildings and Improvements	23,940
Total	33,768
Accumulated Depreciation	$ 4,330
VentureCrossings | Minimum
Schedule III, Real Estate
Depreciation Life (in years)	10 years
VentureCrossings | Maximum
Schedule III, Real Estate
Depreciation Life (in years)	39 years
Watersound Origins Crossings
Schedule III, Real Estate
Encumbrances	$ 2,414
Initial Cost to Company, Land & Improvements	21
Costs Capitalized Subsequent to Acquisition or Construction	7,584
Land & Land Improvements	7,605
Total	7,605
Pier Park Crossings
Schedule III, Real Estate
Encumbrances	33,523
Initial Cost to Company, Land & Improvements	6,886
Initial Cost to Company, Buildings & Improvements	22,501
Costs Capitalized Subsequent to Acquisition or Construction	4,823
Land & Land Improvements	11,708
Buildings and Improvements	22,502
Total	34,210
Accumulated Depreciation	$ 317
Depreciation Life (in years)	39 years
Pier Park Crossings | Minimum
Schedule III, Real Estate
Depreciation Life (in years)	20 years
Pier Park Crossings Phase II
Schedule III, Real Estate
Initial Cost to Company, Land & Improvements	$ 361
Costs Capitalized Subsequent to Acquisition or Construction	1,820
Land & Land Improvements	2,181
Total	2,181
Watercrest
Schedule III, Real Estate
Initial Cost to Company, Land & Improvements	894
Costs Capitalized Subsequent to Acquisition or Construction	8,724
Land & Land Improvements	9,618
Total	9,618
Other Commercial leasing and sales
Schedule III, Real Estate
Encumbrances	2,907
Initial Cost to Company, Land & Improvements	3,540
Initial Cost to Company, Buildings & Improvements	11,057
Costs Capitalized Subsequent to Acquisition or Construction	14,343
Land & Land Improvements	17,712
Buildings and Improvements	11,228
Total	28,940
Accumulated Depreciation	$ 1,355
Other Commercial leasing and sales | Minimum
Schedule III, Real Estate
Depreciation Life (in years)	10 years
Other Commercial leasing and sales | Maximum
Schedule III, Real Estate
Depreciation Life (in years)	39 years
Commercial developments
Schedule III, Real Estate
Encumbrances	$ 1,978
Initial Cost to Company, Land & Improvements	34,816
Costs Capitalized Subsequent to Acquisition or Construction	21,175
Land & Land Improvements	55,991
Total	55,991
Accumulated Depreciation	$ 73
Depreciation Life (in years)	5 years
Timberlands
Schedule III, Real Estate
Initial Cost to Company, Land & Improvements	$ 6,627
Initial Cost to Company, Buildings & Improvements	1,806
Costs Capitalized Subsequent to Acquisition or Construction	12,755
Land & Land Improvements	19,382
Buildings and Improvements	1,806
Total	21,188
Accumulated Depreciation	$ 2,045
Timberlands | Minimum
Schedule III, Real Estate
Depreciation Life (in years)	5 years
Timberlands | Maximum
Schedule III, Real Estate
Depreciation Life (in years)	30 years
Unimproved land
Schedule III, Real Estate
Initial Cost to Company, Land & Improvements	$ 85
Costs Capitalized Subsequent to Acquisition or Construction	4,477
Land & Land Improvements	4,562
Total	4,562
Accumulated Depreciation	$ 34
Unimproved land | Minimum
Schedule III, Real Estate
Depreciation Life (in years)	15 years
Unimproved land | Maximum
Schedule III, Real Estate
Depreciation Life (in years)	20 years