Schedule III (Consolidated) - Real Estate and Accumulated Depreciation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Schedule III, Real Estate
Encumbrances	$ 69,374
Initial Cost to Company, Land & Improvements	155,821
Initial Cost to Company, Buildings & Improvements	147,710
Costs Capitalized Subsequent to Acquisition or Construction	114,963
Land & Land Improvements	273,764
Buildings and Improvements	144,730
Total	418,494	$ 404,376	$ 381,969	$ 377,668
Accumulated Depreciation	67,500
Aggregate cost of real estate owned for federal income tax purposes	432,700
Residential developments
Schedule III, Real Estate
Encumbrances	1,471
Initial Cost to Company, Land & Improvements	48,430
Initial Cost to Company, Buildings & Improvements	10,954
Costs Capitalized Subsequent to Acquisition or Construction	53,283
Land & Land Improvements	111,207
Buildings and Improvements	1,460
Total	112,667
Accumulated Depreciation	$ 2,044
Residential developments | Minimum
Schedule III, Real Estate
Depreciation Life (in years)	5 years
Residential developments | Maximum
Schedule III, Real Estate
Depreciation Life (in years)	25 years
WaterColor Inn
Schedule III, Real Estate
Initial Cost to Company, Land & Improvements	$ 2,237
Initial Cost to Company, Buildings & Improvements	15,790
Costs Capitalized Subsequent to Acquisition or Construction	6,778
Land & Land Improvements	3,259
Buildings and Improvements	21,546
Total	24,805
Accumulated Depreciation	$ 9,591
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
Clubs and golf courses
Schedule III, Real Estate
Initial Cost to Company, Land & Improvements	$ 34,227
Initial Cost to Company, Buildings & Improvements	16,272
Costs Capitalized Subsequent to Acquisition or Construction	3,105
Land & Land Improvements	37,137
Buildings and Improvements	16,467
Total	53,604
Accumulated Depreciation	$ 20,623
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	$ 5,351
Initial Cost to Company, Buildings & Improvements	2,540
Costs Capitalized Subsequent to Acquisition or Construction	329
Land & Land Improvements	5,559
Buildings and Improvements	2,661
Total	8,220
Accumulated Depreciation	$ 1,517
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
Initial Cost to Company, Buildings & Improvements	$ 10,054
Costs Capitalized Subsequent to Acquisition or Construction	89
Buildings and Improvements	10,143
Total	10,143
Accumulated Depreciation	$ 4,232
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
Schedule III, Real Estate
Encumbrances	$ 45,977
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	$ 7,643
Pier Park North | Minimum
Schedule III, Real Estate
Depreciation Life (in years)	15 years
Pier Park North | 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	(2,138)
Land & Land Improvements	787
Buildings and Improvements	19,675
Total	20,462
Accumulated Depreciation	$ 15,424
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	$ 5,791
Initial Cost to Company, Buildings & Improvements	24,490
Costs Capitalized Subsequent to Acquisition or Construction	(2,566)
Land & Land Improvements	3,775
Buildings and Improvements	23,940
Total	27,715
Accumulated Depreciation	$ 3,433
VentureCrossings | Minimum
Schedule III, Real Estate
Depreciation Life (in years)	10 years
VentureCrossings | Maximum
Schedule III, Real Estate
Depreciation Life (in years)	39 years
Pier Park Crossings
Schedule III, Real Estate
Encumbrances	$ 14,285
Initial Cost to Company, Land & Improvements	705
Costs Capitalized Subsequent to Acquisition or Construction	13,092
Land & Land Improvements	13,796
Total	13,796
Other commercial
Schedule III, Real Estate
Encumbrances	2,788
Initial Cost to Company, Land & Improvements	2,962
Initial Cost to Company, Buildings & Improvements	8,684
Costs Capitalized Subsequent to Acquisition or Construction	2,970
Land & Land Improvements	5,933
Buildings and Improvements	8,684
Total	14,617
Accumulated Depreciation	$ 913
Other commercial | Minimum
Schedule III, Real Estate
Depreciation Life (in years)	10 years
Other commercial | Maximum
Schedule III, Real Estate
Depreciation Life (in years)	39 years
Commercial developments
Schedule III, Real Estate
Encumbrances	$ 4,853
Initial Cost to Company, Land & Improvements	34,922
Costs Capitalized Subsequent to Acquisition or Construction	21,018
Land & Land Improvements	55,940
Total	55,940
Accumulated Depreciation	$ 66
Depreciation Life (in years)	5 years
Timber property
Schedule III, Real Estate
Initial Cost to Company, Land & Improvements	$ 6,687
Initial Cost to Company, Buildings & Improvements	1,796
Costs Capitalized Subsequent to Acquisition or Construction	11,282
Land & Land Improvements	17,969
Buildings and Improvements	1,796
Total	19,765
Accumulated Depreciation	$ 1,983
Timber property | Minimum
Schedule III, Real Estate
Depreciation Life (in years)	5 years
Timber property | 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	4,606
Land & Land Improvements	4,691
Total	4,691
Accumulated Depreciation	$ 31
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