Disclosures About Fair Value (Details) Fair Value of Assets on a Nonrecurring Basis - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Intangible water assets, loss	$ (269)	$ (2,282)
Oil and gas wells, loss	(1,816)
Real estate, loss	(274)	(2,865)
Real estate	5,960
Real estate, loss	(923)
Investment in unconsolidated affiliate, loss	(20,696)	(1,078)
Real Estate Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Tangible water asset and other assets, Loss		(3,509)
Real estate, loss		(2,900)
Corporate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Oil and gas wells, loss		(4,428)
Fair Value, Measurements, Nonrecurring \| Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Intangible water assets	3,023	3,638
Tangible water asset and other assets		0
Oil and gas wells	2,542	1,730
Real estate	3,400	1,357
Investment in unconsolidated affiliate	$ 2,163	$ 15,858

Equity Method and Cost Method Investments

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Real Estate, Fair Value

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Real Estate, Fair Value

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The loss (gain) resulting from the write-down of the carrying value of assets classified as a disposal group, but one which is not further classified as a discontinued operation, to fair value less cost to sell. A (gain) results from a subsequent increase in fair value less cost to sell, but not in excess of the cumulative loss previously recognized. For example, the write-down of a disposal group subject to a plan of sale, which was not sold in the current period, to its held-for-sale value. The loss (gain) is included in income from continuing operations before income taxes in the income statement.

+ References

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This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment.

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Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

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The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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The charge against earnings in the period to reduce the carrying amount of real property to fair value.

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Carrying amount as of the balance sheet date of investments in land and buildings held for sale, excluding real estate considered to be inventory of the entity.

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