Investment in Real Estate - Real Estate by Property Type and Segment (Details) $ in Thousands	Mar. 31, 2019 USD ($) item	Dec. 31, 2018 USD ($)
Real estate properties
Investment in real estate, net	$ 364,715	$ 350,994
Development property
Real estate properties
Investment in real estate, net	199,898	186,818
Development property \| Corporate
Real estate properties
Investment in real estate, net	2,557	2,497
Development property \| Residential real estate \| Operating Segments
Real estate properties
Investment in real estate, net	$ 110,819	105,323
Development property \| Hospitality
Real estate properties
Number of gulf-front vacation homes under construction \| item	2
Development property \| Hospitality \| Operating Segments
Real estate properties
Investment in real estate, net	$ 5,429	3,726
Development property \| Commercial leasing and sales \| Operating Segments
Real estate properties
Investment in real estate, net	78,949	73,128
Development property \| Forestry \| Operating Segments
Real estate properties
Investment in real estate, net	2,144	2,144
Operating property
Real estate properties
Investment in real estate	233,770	231,676
Less: Accumulated depreciation	68,953	67,500
Investment in real estate, net	164,817	164,176
Operating property \| Other
Real estate properties
Investment in real estate	50	50
Operating property \| Residential real estate \| Operating Segments
Real estate properties
Investment in real estate	7,344	7,344
Operating property \| Hospitality \| Operating Segments
Real estate properties
Investment in real estate	93,046	93,046
Operating property \| Commercial leasing and sales \| Operating Segments
Real estate properties
Investment in real estate	113,189	111,471
Operating property \| Forestry \| Operating Segments
Real estate properties
Investment in real estate	$ 20,141	$ 19,765

Number of gulf-front vacation homes under construction.

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- Definition

The cumulative amount of depreciation for real estate property held for investment purposes.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.1(3))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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- Definition

Amount of real estate investment property which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.1(d))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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- Definition

Amount of real estate investment property, net of accumulated depreciation, which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.1(d))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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