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Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified | 6 Months Ended
--- | ---
Jun. 30, 2012 | Jun. 30, 2011
Revenue components of commercial/industrial real estate segment |  |
Revenue of commercial/industrial real estate segment | $ 12,556 | $ 9,392
Commercial leases [Member] |  |
Revenue components of commercial/industrial real estate segment |  |
Revenue of commercial/industrial real estate segment | 2,918 | 2,616
Oil and Gas [Member] |  |
Revenue components of commercial/industrial real estate segment |  |
Revenue of commercial/industrial real estate segment | 7,183 | 4,084
Mineral revenue [Member] |  |
Revenue components of commercial/industrial real estate segment |  |
Revenue of commercial/industrial real estate segment | 642 | 561
Grazing leases [Member] |  |
Revenue components of commercial/industrial real estate segment |  |
Revenue of commercial/industrial real estate segment | 587 | 564
Land Sale [Member] |  |
Revenue components of commercial/industrial real estate segment |  |
Revenue of commercial/industrial real estate segment | 648 |
All other land management ancillary services [Member] |  |
Revenue components of commercial/industrial real estate segment |  |
Revenue of commercial/industrial real estate segment | $ 578 | $ 1,567

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- Definition Amount of total revenue for the reportable segments, including revenue from external customers, transactions with other operating segments of the same entity, and (gross) interest revenue. All considered to be "operating revenue" for purposes of the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a),(b),(c) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8736-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph a, b, c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. + Details
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