Disclosures About Fair Value - Fair Value Measurements on a Non-Recurring Basis (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Sep. 30, 2015	Dec. 31, 2014
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Loss on intangible assets		$ (2,282)
Loss on tangible water and other assets		(3,509)
Loss on oil and gas wells	$ (1,816)	(4,428)
Loss on real estate	(274)	(2,865)
Loss on real estate and development costs	(1,875)
Loss on investments in unconsolidated affiliates equity securities held at cost	(20,696)	(1,078)
Fair Value, Measurements, Nonrecurring \| Fair Value, Inputs, Level 3
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Intangible water assets		3,638
Tangible water and other assets		0
Oil and gas wells	2,542	1,730
Real estate	3,400	1,357
Real estate and development costs	1,326
Investment in unconsolidated affiliates equity securities held at cost	$ 2,163	$ 15,858

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The amount of the gain (loss) recognized by the parent and included in its attributable portion of net income for the period due to deconsolidation of a subsidiary or derecognition of a group of assets. The gain (loss) recognized and included in the net income attributable to the parent for the period is generally computed as the difference between: (a) the aggregate of: (1) the fair value of any consideration received; (2) the fair value of any retained noncontrolling investment in the former subsidiary at the date the subsidiary was deconsolidated; and (3) the carrying amount of any noncontrolling interest in the former subsidiary (including any accumulated other comprehensive income attributable to the noncontrolling interest) at the date the subsidiary was deconsolidated and (b) the carrying amount of the former subsidiary's assets and liabilities.

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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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