| **Investment in Real Estate - Real Estate by Property Type and Segment (Details) (USD $)** | 3 Months Ended | 6 Months Ended |         |
|--------------------------------------------------------------------------------------------|----------------|----------------|---------|
||
| **Real Estate Properties [Line Items]**                                                    |           |                |    |   |  |   |   |  |
| Operating property                                                                         | $ 211,889,000  |                |    | $ 211,889,000 |  |   | $ 211,000,000 |  |
| Development property                                                                       | 212,791,000    |                |    | 212,791,000 |  |   | 202,073,000 |  |
| Investment property                                                                        | 5,116,000      |                |    | 5,116,000 |  |   | 5,124,000 |  |
| Investment in unconsolidated affiliates                                                    | 2,195,000      | [1]            |    | 2,195,000 | [1] |   | 2,222,000 | [1],[2] |
| Total real estate investments                                                              | 431,991,000    |                |    | 431,991,000 |  |   | 420,419,000 |  |
| Less: Accumulated depreciation                                                             | 52,236,000     |                |    | 52,236,000 |  |   | 49,772,000 |  |
| Investment in real estate                                                                  | 379,755,000    |                |    | 379,755,000 |  |   | 370,647,000 |  |
| Capitalized indirect costs incurred                                                        | 100,000        |                | 100,000 | 100,000 |  | 100,000 |   |  |
| Asset impairment charges                                                                   | 0              |                | 0       | 0 |  | 0 |   |  |
| Residential Real Estate                                                                    |           |                |    |   |  |   |   |  |
| **Real Estate Properties [Line Items]**                                                    |           |                |    |   |  |   |   |  |
| Operating property                                                                         | 2,786,000      |                |    | 2,786,000 |  |   | 2,792,000 |  |
| Development property                                                                       | 135,991,000    |                |    | 135,991,000 |  |   | 133,835,000 |  |
| Commercial Real Estate                                                                     |           |                |    |   |  |   |   |  |
| **Real Estate Properties [Line Items]**                                                    |           |                |    |   |  |   |   |  |
| Development property                                                                       | 57,977,000     |                |    | 57,977,000 |  |   | 59,851,000 |  |
| Investment property                                                                        | 700,000        |                |    | 700,000 |  |   | 700,000 |  |
| Resorts, leisure and leasing operations                                                    |           |                |    |   |  |   |   |  |
| **Real Estate Properties [Line Items]**                                                    |           |                |    |   |  |   |   |  |
| Operating property                                                                         | 153,162,000    |                |    | 153,162,000 |  |   | 152,906,000 |  |
| Development property                                                                       | 10,781,000     |                |    | 10,781,000 |  |   | 351,000 |  |
| Investment property                                                                        | 255,000        |                |    | 255,000 |  |   | 255,000 |  |
| Forestry                                                                                   |           |                |    |   |  |   |   |  |
| **Real Estate Properties [Line Items]**                                                    |           |                |    |   |  |   |   |  |
| Operating property                                                                         | 55,757,000     |                |    | 55,757,000 |  |   | 54,984,000 |  |
| Investment property                                                                        | 953,000        |                |    | 953,000 |  |   | 953,000 |  |
| Rural land                                                                                 |           |                |    |   |  |   |   |  |
| **Real Estate Properties [Line Items]**                                                    |           |                |    |   |  |   |   |  |
| Operating property                                                                         | 139,000        |                |    | 139,000 |  |   | 139,000 |  |
| Development property                                                                       | 5,767,000      |                |    | 5,767,000 |  |   | 5,768,000 |  |
| Corporate                                                                                  |           |                |    |   |  |   |   |  |
| **Real Estate Properties [Line Items]**                                                    |           |                |    |   |  |   |   |  |
| Development property                                                                       | 2,275,000      |                |    | 2,275,000 |  |   | 2,268,000 |  |
| Other                                                                                      |           |                |    |   |  |   |   |  |
| **Real Estate Properties [Line Items]**                                                    |           |                |    |   |  |   |   |  |
| Operating property                                                                         | 45,000         |                |    | 45,000 |  |   | 179,000 |  |
| Investment property                                                                        | $ 3,208,000    |                |    | $ 3,208,000 |  |   | $ 3,216,000 |  |
|                                                                                            |
| [1]Recorded in the Company’s resorts, leisure and leasing operations' segment.[2]   |

| X                                                                                                                                                                                                                                                                              |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Income-Producing Depreciable Operating Property
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                  |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Real Estate Inventory, Capitalized Indirect Costs Incurred
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2420-110228Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 144 -Paragraph 45, 46, 47 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - 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
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The cumulative amount of depreciation for real estate property held for investment purposes.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - 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
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - 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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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of real estate owned for income production and capital accretion potential, not otherwise specified in the existing taxonomy. Such real estate excludes that which is occupied or used in the business, for entertainment purposes, or held in inventory for specific purposes.
+ 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 210.7-03.1(d)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The carrying amount of investments in unconsolidated real estate and other joint ventures not separately presented. This includes direct and indirect investments.
+ 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 210.7-03.1(d)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910
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| X                                                                                                                                                                 |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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