Real Estate by Property Type and Segment (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Real Estate Properties [Line Items]
Operating property	$ 211,000	$ 199,890
Development property	202,073	224,418
Investment property	5,124	5,124
Resorts, leisure and leasing operations	2,222	2,259
Total real estate investments	420,419	431,691
Less: Accumulated depreciation	49,772	44,489
Investment in real estate	370,647	387,202
Residential Real Estate
Real Estate Properties [Line Items]
Operating property	2,792	3,274
Development property	133,835	150,175
Commercial Real Estate
Real Estate Properties [Line Items]
Operating property		4,691
Development property	59,851	63,469
Investment property	700	700
Resorts, leisure and leasing operations
Real Estate Properties [Line Items]
Operating property	152,906	133,289
Development property	351	1,201
Investment property	255	255
Rural land
Real Estate Properties [Line Items]
Operating property	139	139
Development property	5,768	7,410
Forestry
Real Estate Properties [Line Items]
Operating property	54,984	58,087
Investment property	953	953
Other
Real Estate Properties [Line Items]
Operating property	179	410
Investment property	3,216	3,216
Corporate
Real Estate Properties [Line Items]
Development property	$ 2,268	$ 2,163

Income-Producing Depreciable Operating Property

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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.

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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.

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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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- Definition

The carrying amount of investments in unconsolidated real estate and other joint ventures not separately presented. This includes direct and indirect investments.

+ References

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