Real Estate and Accumulated Depreciation (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	6,516,000
Initial Cost to Company, Land	154,320,000
Initial Cost to Company, Buildings & Improvements	131,678,000
Costs Capitalized Subsequent to Acquisition or Construction	93,946,000
Land & Land Improvements	252,769,000
Buildings and Improvements	127,175,000
Total	379,944,000	436,264,000	418,197,000	429,431,000
Accumulated Depreciation	58,132,000	53,496,000
SEC Schedule III, Real Estate, Federal Income Tax Basis	544,000,000
Residential development
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,459,000
Initial Cost to Company, Land	43,153,000
Initial Cost to Company, Buildings & Improvements	0
Costs Capitalized Subsequent to Acquisition or Construction	59,258,000
Land & Land Improvements	102,411,000
Buildings and Improvements	0
Total	102,411,000
Accumulated Depreciation	0
Commercial development
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,057,000
Initial Cost to Company, Land	45,701,000
Initial Cost to Company, Buildings & Improvements	0
Costs Capitalized Subsequent to Acquisition or Construction	13,704,000
Land & Land Improvements	59,405,000
Buildings and Improvements	0
Total	59,405,000
Accumulated Depreciation	0
WaterColor Inn
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company, Land	1,202,000
Initial Cost to Company, Buildings & Improvements	14,000,000
Costs Capitalized Subsequent to Acquisition or Construction	5,124,000
Land & Land Improvements	1,558,000
Buildings and Improvements	18,768,000
Total	20,326,000
Accumulated Depreciation	6,831,000
WaterColor Inn | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Depreciation Life	10 years
WaterColor Inn | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Depreciation Life	40 years
Clubs and golf courses
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company, Land	38,447,000
Initial Cost to Company, Buildings & Improvements	24,053,000
Costs Capitalized Subsequent to Acquisition or Construction	(4,268,000)
Land & Land Improvements	34,653,000
Buildings and Improvements	23,579,000
Total	58,232,000
Accumulated Depreciation	22,961,000
Clubs and golf courses | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Depreciation Life	10 years
Clubs and golf courses | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Depreciation Life	25 years
Marinas
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company, Land	6,252,000
Initial Cost to Company, Buildings & Improvements	9,619,000
Costs Capitalized Subsequent to Acquisition or Construction	10,000
Land & Land Improvements	6,218,000
Buildings and Improvements	9,663,000
Total	15,881,000
Accumulated Depreciation	3,544,000
Marinas | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Depreciation Life	10 years
Marinas | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Depreciation Life	25 years
Other
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company, Land	0
Initial Cost to Company, Buildings & Improvements	34,469,000
Costs Capitalized Subsequent to Acquisition or Construction	(18,771,000)
Land & Land Improvements	0
Buildings and Improvements	15,698,000
Total	15,698,000
Accumulated Depreciation	6,203,000
Other | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Depreciation Life	10 years
Other | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Depreciation Life	30 years
Pier Park North
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company, Land	2,641,000
Initial Cost to Company, Buildings & Improvements	0
Costs Capitalized Subsequent to Acquisition or Construction	42,085,000
Land & Land Improvements	16,801,000
Buildings and Improvements	27,925,000
Total	44,726,000
Accumulated Depreciation	1,017,000
Pier Park North | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Depreciation Life	15 years
Pier Park North | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Depreciation Life	40 years
Towncenters
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company, Land	777,000
Initial Cost to Company, Buildings & Improvements	30,904,000
Costs Capitalized Subsequent to Acquisition or Construction	(12,205,000)
Land & Land Improvements	784,000
Buildings and Improvements	18,692,000
Total	19,476,000
Accumulated Depreciation	12,127,000
Towncenters | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Depreciation Life	10 years
Towncenters | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Depreciation Life	25 years
VentureCrossings
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company, Land	1,566,000
Initial Cost to Company, Buildings & Improvements	7,899,000
Costs Capitalized Subsequent to Acquisition or Construction	0
Land & Land Improvements	1,566,000
Buildings and Improvements	7,899,000
Total	9,465,000
Accumulated Depreciation	985,000
VentureCrossings | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Depreciation Life	10 years
VentureCrossings | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Depreciation Life	25 years
Other
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company, Land	7,999,000
Initial Cost to Company, Buildings & Improvements	8,862,000
Costs Capitalized Subsequent to Acquisition or Construction	(7,145,000)
Land & Land Improvements	7,051,000
Buildings and Improvements	2,665,000
Total	9,716,000
Accumulated Depreciation	2,508,000
Other | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Depreciation Life	10 years
Other | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Depreciation Life	25 years
Timberlands
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company, Land	6,582,000
Initial Cost to Company, Buildings & Improvements	1,872,000
Costs Capitalized Subsequent to Acquisition or Construction	10,385,000
Land & Land Improvements	16,553,000
Buildings and Improvements	2,286,000
Total	18,839,000
Accumulated Depreciation	1,956,000
Unimproved land
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company, Land	0
Initial Cost to Company, Buildings & Improvements	0
Costs Capitalized Subsequent to Acquisition or Construction	5,769,000
Land & Land Improvements	5,769,000
Buildings and Improvements	0
Total	5,769,000
Accumulated Depreciation	0