Investments in Real Estate - Real Estate by Property Type and Segment (Details) - USD ($)	3 Months Ended
Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Real Estate Properties [Line Items]
Development property	$ 172,769,000		$ 164,849,000
Operating property	217,969,000		217,120,000
Less: Accumulated depreciation	68,641,000		67,349,000
Total operating property, net	149,328,000		149,771,000
Investment in real estate, net	322,097,000		314,620,000
Capitalized indirect costs incurred	100,000.0	$ 0
Residential real estate
Real Estate Properties [Line Items]
Development property	103,919,000		101,292,000
Operating property	8,138,000		8,097,000
Commercial real estate
Real Estate Properties [Line Items]
Development property	56,118,000		56,073,000
Resorts and leisure
Real Estate Properties [Line Items]
Development property	855,000		263,000
Operating property	105,818,000		107,029,000
Leasing operations
Real Estate Properties [Line Items]
Development property	6,916,000		2,291,000
Operating property	83,891,000		82,336,000
Forestry
Real Estate Properties [Line Items]
Development property	2,491,000		2,492,000
Operating property	20,072,000		19,608,000
Other
Real Estate Properties [Line Items]
Operating property	50,000		50,000
Corporate
Real Estate Properties [Line Items]
Development property	$ 2,470,000		$ 2,438,000

Income-Producing Depreciable Operating Property

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- Definition

Income Producing Depreciable Operating Property, Net of Accumulated Depreciation

+ References

No definition available.

+ Details

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- Definition

Real Estate Inventory, Capitalized Indirect Costs Incurred

+ References

No definition available.

+ Details

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- Definition

The current amount of expenditures for a real estate project that has not yet been completed.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.10)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Phase
-URI http://asc.fasb.org/extlink&oid=49177889

+ Details

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- Definition

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

+ References

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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

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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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