Real Estate by Property Type and Segment (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Real Estate Properties [Line Items]
Operating property	$ 205,108	$ 199,890
Development property	208,261	224,418
Investment property	5,124	5,124
Total real estate investments	420,712	431,691
Less: accumulated depreciation	(47,923)	(44,489)
Investments in real estate	372,789	387,202
Residential real estate
Real Estate Properties [Line Items]
Operating property	136,144	136,563
Development property	147,619	157,245
Commercial real estate
Real Estate Properties [Line Items]
Operating property	14,684	4,691
Development property	52,617	57,600
Investment property	700	700
Rural land sales
Real Estate Properties [Line Items]
Operating property	139	139
Development property	8,025	9,573
Forestry
Real Estate Properties [Line Items]
Operating property	53,731	58,087
Investment property	953	953
Other
Real Estate Properties [Line Items]
Operating property	410	410
Investment property	3,471	3,471
Investment in unconsolidated affiliates
Real Estate Properties [Line Items]
Residential real estate	$ 2,219	$ 2,259

Income-Producing Depreciable Operating Property

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- Definition

Investment in unconsolidated real estate affiliates.

+ 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

+ Details

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- Definition

The cumulative amount of depreciation for real estate property held for investment 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(3))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 7

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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

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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

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

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